Eaton Bussmann Series User manual

Manual MN019001EN Effective November 2015
Supersedes September 2014
Bussmann series
PV Combiner box
Contents
Important. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Signal words used in this manual . . . . . . . . . 3
Skilled worker definitions . . . . . . . . . . . . . . . . . 3
Electrically instructed person . . . . . . . . . . . . . 3
Electrically skilled person . . . . . . . . . . . . . . . . 3
Skills of qualified persons . . . . . . . . . . . . . . . . . 3
Competent person . . . . . . . . . . . . . . . . . . . . . 3
Safety precautions. . . . . . . . . . . . . . . . . . . . . . . 3
Anatomy of an Eaton’s Bussmann series
combiner box. . . . . . . . . . . . . . . . . . . . . . . . . . . 4
The PV combiner box . . . . . . . . . . . . . . . . . . . . 6
Product description . . . . . . . . . . . . . . . . . . . . 6
Supplied components . . . . . . . . . . . . . . . . . . 7
Maintaining the IP rating . . . . . . . . . . . . . . . . 8
Handle operation . . . . . . . . . . . . . . . . . . . . . . 8
Safety Instructions. . . . . . . . . . . . . . . . . . . . . . . 9
Electric shock . . . . . . . . . . . . . . . . . . . . . . . . . 9
Burn hazards . . . . . . . . . . . . . . . . . . . . . . . . . 9
Damage to the Eaton’s Bussmann series
combiner box . . . . . . . . . . . . . . . . . . . . . . . . . 9
Product warning labels. . . . . . . . . . . . . . . . . . 9
Service and maintenance. . . . . . . . . . . . . . . . 9
Interlocking door and switch . . . . . . . . . . . . 10
Installation instructions . . . . . . . . . . . . . . . . . . 11
Unpacking and inspection . . . . . . . . . . . . . . 11
Electrical connections . . . . . . . . . . . . . . . . . 11
Mounting . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Monitoring solutions . . . . . . . . . . . . . . . . . . . . 14
8 string monitoring units . . . . . . . . . . . . . . . 15
16 string monitoring units . . . . . . . . . . . . . . 16
24 string monitoring units . . . . . . . . . . . . . . 17
Monitoring unit configurations . . . . . . . . . . 19
Optional external connection port . . . . . . . . 19
Replaceable parts . . . . . . . . . . . . . . . . . . . . . . 20
Fuses . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
SPD modules . . . . . . . . . . . . . . . . . . . . . . . 20
Service items . . . . . . . . . . . . . . . . . . . . . . . . 20

2
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
mDANGER!
HAZARDOUS VOLTAGE—WILL CAUSE SEVERE INJURY OR DEATH.
WORKING ON OR NEAR ENERGIZED CIRCUITS POSES A SERIOUS RISK
OF ELECTRICAL SHOCK. DE-ENERGIZE ALL CIRCUITS BEFORE INSTALL-
ING OR SERVICING THIS EQUIPMENT AND FOLLOW ALL PRESCRIBED
SAFETY PROCEDURES.
Important
These procedures do not claim to cover all possible details or
variations encountered with the combiner box. Nor do they provide
for all possible conditions that may be encountered. If further
information is desired or needed to address any particular issue
not covered in this document, contact your Eaton representative.
The information in this document does not relieve the user from
exercising good judgment, nor from using sound safety practices.
ote:N Because Eaton has a policy of continuous product improvement, we
reserve the right to change design specifications without notice. Should
a conflict arise between the general information in this document and the
contents of drawings or supplementary material, or both, the latter shall
take precedence. For the latest version of this Instruction Leaflet, download
“Instruction Leaflet” from the Eaton’s Bussmann series website at: www.
eaton.com/bussmannseries.
The contents of this Instruction Leaflet are not part of, nor do
they modify, any prior or existing agreement, commitment or
relationship. The Eaton terms and conditions of sale constitute the
entire obligation of Eaton. The warranty in the terms and condi-
tions of sale is the sole warranty of Eaton. Any statements in this
document do not create new warranties or modify any existing
warranty.
This manual contains important instructions for all Eaton’s
Bussmann series combiner box models that must be followed
during the installation and use of the combiner boxes.
The combiner boxes are designed and tested according to
IEC61439-1 & 2 and international safety requirements, but as with
all electrical and electronic equipment, certain precautions must
be observed when installing the combiner boxes.
In the instance where a combiner box is supplied without a
disconnect switch, additional precautions must be taken to ensure
that the unit is isolated from all other components in the PV
system, and that there is no danger present to anyone working on
the unit. The combiner box is then opened at the users risk.
To reduce the risk of personal injury and to ensure the safe installa-
tion and operation of the combiner boxes, you must carefully read
and follow all instructions and warnings in this Technical Manual.

3
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
Introduction
Copyright © 2015 Eaton. All rights reserved. No part of this document
may be reproduced, stored on a retrieval system, in any form or by
any means, electronic, mechanical, photographic, magnetic or other-
wise, without the prior written permission of Eaton.
Eaton makes no representations, express or implied, with respect
to this documentation or any of the equipment and/or software it
may describe, including (with no limitation) any implied warranties
of utility, merchantability, or fitness for any particular purpose.
All such warranties are expressly disclaimed. Eaton is not liable
for any indirect, accidental, or consequential damages under any
circumstances.
The exclusion of implied warranties may not apply in all cases
under some statutes, and thus the above exclusion may not apply.
Specifications are subject to change without notice. Every attempt
has been made to make this document complete, accurate and
up-to-date. Users are cautioned, however, that Eaton reserves the
right to make changes without notice and shall not be responsible
for any damages, caused by reliance on the material presented,
including, but not limited to, omissions, typographical errors, arith-
metical errors or listing errors in the content material.
Signal words used in this manual
The signal words “DANGER,” “WARNING,” “CAUTION” and
“NOTICE” (along with their assigned symbol) throughout this
manual indicate the degree of hazard the user may encounter.
These symbols and words are defined as:
mDANGER
INDICATES A HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, WILL
RESULT IN DEATH OR SERIOUS INJURY.
mWARNING
INDICATES A HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, COULD
RESULT IN DEATH OR SERIOUS INJURY.
mCAUTION
INDICATES A HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, COULD
RESULT IN MINOR OR MODERATE INJURY.
NOTICE
INDICATES A HAZARDOUS SITUATION WHICH, IF NOT AVOIDED, COULD
RESULT IN PROPERTY DAMAGE.
Skilled worker definitions
The following definitions apply as electrically instructed, skilled or
competent people. Where in this manual an instructed, skilled or
competent person is referred to, it is intended that they meet the
description provided below for that definition.
Electrically instructed person
Person adequately advised or supervised by electrically skilled
persons to enable him or her to perceive risks and to avoid
hazards which electricity can create.
Electrically skilled person
Person with relevant education and experience to enable him or her
to perceive risks and to avoid hazards which electricity can create.
Skills of qualified persons
A skilled person must possess the following:
• Knowledge of the subject equipment and the hazards involved
with their application, use, administration and maintenance
• Training and authorization to de-energise, clear, ground and tag
circuits and equipment in accordance with established safety
practices
• Training in the proper care and use of personal protective equip-
ment such as rubber gloves, hard hat, safety glasses or face
shields. Arc-flashing clothing, etc. in accordance with estab-
lished safety practices
• Trained to render first aid
• Has received safety training to recognise and avoid the
hazards involved
• The skills and knowledge pertaining to the construction and
operation of this equipment and its installation
Competent person
Person having appropriate training, skill, knowledge and experi-
ence to prevent danger or injury arising from work within the
scope of the Regulations.
Safety precautions
It is assumed the combiner box user will follow standard safety
precautions for working in an electrical environment. For more
information on safety precautions and procedures, consult the
following sources:
International Electrotechnical Commission (IEC): www.iec.ch.
Safety according to the International Electrotechnical Commission
(IEC): http://www.iec.ch/about/values/safety.htm
National Fire Protection Association (NFPA): www.nfpa.org.

4
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
Anatomy of an Eaton’s Bussmann series combiner box

5
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com

6
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
The PV combiner box
Eaton has introduced a new line of monitored combiner boxes
designed for use with all module and inverter combinations.
Combiner box features include:
• Designed and tested to the requirements of IEC 61439-1 and 2.
• Compact, low-cost and highly flexible design.
• Easy to connect input and output cabling via MC4 connectors or
IP65 rated glands.
• Available in IP65 rated fibre-glass reinforced polyester (GRP),
IP65 powder-coated galvanised steel enclosures and IP65 rated
stainless steel in a range of sizes.
• Internals are “touch safe” to IP20.
• Design options include integrated load disconnects, monitoring
solutions, surge protection devices, self-powered or externally
powered solutions and wireless communication.
• External wired modbus connection port.
Product description
For specific details regarding your combiner box design, please
see the documentation included in your order. This should provide
a detailed assembly layout and wiring diagram.
The product description is demonstrated through the Part Number
Breakdown and Rating Plate. Please ensure that careful attention
is paid to the information that is represented on the rating plate to
ensure that you are aware of the specifications of your individual
combiner box design.
Standard configurable products
Part numbers for projects outside the standard configurable prod-
ucts will be determined by an individual project part number.
Cenn-xxAyypsh-vmm
Product series = C (combiner box)
Enclosure type (e):
G = GRP
T = GRP with transparent polycarbonate window
M = Painted steel enclosure
S = Stainless steel
Number of strings (nn):
Any number of strings, 01, 02 ... 12, 13 etc. maximum 24 strings
Fuse current rating (xxA):
01A, 02A, 03A, 04A, 05A, 06A, 08A, 10A, 12A, 15A, 20A, 25A, 32A
System voltage (yy):
06 = 600 VDC
08 = 800 VDC
10 = 1,000 VDC
12 = 1,200 VDC
15 = 1,500 VDC
String protection type (p) Indicated fuse holders:
P = Positive only fuse protection
N = Negative only fuse protection
B = Both positive and negative fuse protection
String protection type (p) Non-indicating fuse holders:
Q = Positive only fuse protection
M = Negative only fuse protection
C = Both positive & negative fuse protection
Switch disconnect (s):
D = Disconnect switch
F = Fixed, no disconnect switch
Cenn-xxAyypsh-vmm
PV string input / output connection type (h)
G = Bottom entry glands / standard output glands
M = Bottom entry MC4s / standard output glands
S = Left and right side entry glands / standard output glands
T = Left and right side entry MC4s / standard output glands
U = Bottom entry glands / armoured output glands
W = Bottom entry MC4s / armoured output glands
X = Left and right side entry glands / armoured output glands
Y = Left and right side entry MC4s / armoured output glands
Over voltage protection (SPD) (v):
A = No SPD
B = T1 PV SPD
C = T2 PV SPD
D = T2 PV SPD with remote
E = T1 PV SPD + T2 TN 240VAC SPD with remote*
F = T1 PV SPD + T2 TT 240VAC SPD with remote*
G = T1 PV SPD + T2 TN 240VAC SPD with remote +
C2/D1 modbus SPD*
H = T1 PV SPD + T2 TT 240VAC SPD with remote +
C2/D1 modbus SPD*
J = T1 PV SPD + C2/D1 modbus SPD*
K = T2 PV SPD with remote + T2 TN 240VAC SPD with remote*
L = T2 PV SPD with remote + T2 TT 240VAC SPD with remote*
M = T2 PV SPD with remote + T2 TN 240VAC SPD with remote + C2/D1
modbus SPD*
N = T2 PV SPD with remote + T2 TT 240VAC SPD with remote + C2/D1
Modbus SPD*
*P = T2 PV SPD with remote + C2/D1 modbus SPD*
Q = T1/T2 PV SPD
R = T1/T2 PV SPD with remote *
S = T1/T2 PV SPD with remote + T2 TN 240VAC SPD with remote *
T = T1/T2 PV SPD with remote + T2 TT 240VAC SPD with remote *
U = T1/T2 PV SPD with remote + T2 TN 240VAC SPD with remote + C2/D1
Modbus SPD *
V = T1/T2 PV SPD with remote + T2 TT 240VAC SPD with remote + C2/D1
Modbus SPD *
W = T1/T2 PV SPD with remote + C2/D1 Modbus SPD *
Monitoring system (mm):
M1 = Shunt monitoring unit with 240VAC power supply – wired modbus
M2 = Shunt monitoring unit with no power supply – wired modbus
M3 = Shunt monitoring unit with PV power (self powered) – with modbus
Z1 = Shunt monitoring unit with 240VAC power supply – wireless zigbee
Z2 = Shunt monitoring unit with no power supply – wireless Zigbee
Z3 = Shunt monitoring unit with PV power (self powered) – wireless zigbee
W1 = Shunt monitoring unit with 240VAC power supply – industrial wireless
(EL-245U-E-A-EU)
W2 = Shunt monitoring unit with no power supply – industrial wireless
(EL-245U-E-A-EU)
W3 = Shunt monitoring unit with PV power (self powered) – industrial wire-
less (EL-245U-E-A-EU)

7
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
Cenn-xxAyypsh-vmm
*Monitored combiner box only
Custom designs
Where customer requirements fall outside the structure options,
the existing process of assigning a project number will be used
with the part number becoming the following:
CBnn-xxACBnnnnn
Product Series = CB (combiner box special)
Number of strings (nn):
Any number of strings, 01, 02 ... 12, 13 etc. Maximum 24 strings
Fuse current rating (xxA):
01A, 02A, 03A, 04A, 05A, 06A, 08A, 10A, 12A, 15A, 20A, 25A, 32A
Project number (CBnnnnn)
Number assigned by applications engineering or product management
Rating plate
A rating plate is supplied with each combiner box, and details the
following information –
DATE
SOLAR COMBINER BOX
TYPE: ĞŶŶͲdždžLJLJƉƐŚͲǀŵŵ
Number of Strings: XX
Rated Breaking Capacity of Fuse 50kA DC
Max Fuse Per String In = XXA
Integrated Disconnect Current Rating XXXA
Ue = XXXX VDC
Unique ID No. = XXXXXXXXXXX
IEC60364-7-712 IEC60439-1
QTY: 1
PLANT ADDRESS
COUNTRY OF ORIGIN
CONTACT DETAILS
Details shown in red are variable for each product. The top right
corner of the label states the details of the plant and country of
origin of the combiner box. Rating plate details are correct at time
of print.
Supplied components
The following are included in every combiner box order as stan-
dard. The parts contained within the combiner box unit will vary
dependent upon the request and design. Where the design of a
component may vary dependent on enclosure size, a suitable item
will have been included for the individual combiner box design
Supplied components
Ref# Item Quantity Notes
1 Combiner box unit 1 Design may vary dependent on
enclosure size
2 Wall mounting
brackets 4
3 Enclosure key 1 Design may vary dependent on
enclosure size. Not included in
designs with transparent covers
4Technical manual 1 Specific to the part supplied
5 GA layout and wiring
diagrams 1
6 Technical
specification 1 Specific to the part supplied
Combiner box unit. Internal components will vary based upon
individual requirements
Figure 1. Wall mounting brackets: left: 1050 x 850 enclosures,
right: all other sizes
Enclosure key top: design a (1050 x 850 x 350 enclosures) bottom:
design b (all other enclosures without screw top covers)

8
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
NOTICE
Maintaining the IP rating
Eaton’s Bussmann series combiner box is IP 65 rated, please do
not tamper with or change any of the seals, IP68 rated glands,
IP66 rated breather drain or IP67 rated MC4 connectors where
these are installed. If MC4 connectors are installed, the IP rating is
lowered to IP20 whilst disconnected. Therefore, these must only
be disconnected when necessary.
Eaton assumes no liability for lack of ingress protection due
to disconnected MC4 connectors after initial installation.
Any door or cover used has an IP65 seal in order to maintain the
IP ingress of the box. This seal must not be damaged or altered
in anyway. If an external switch disconnect handle is fitted, it has
been done so with an IP65 rated seal. Do not remove or replace
the switch handle as this will compromise the IP rating of the
combiner box.
Please ensure that the enclosure edge is clear of obstruction
before closing the door or cover.
Where P55 rated vents and or air filters are present in the product
please regularly check and maintain any seals and filters to ensure
correct IP rating and necessary airflow.
It is the end user responsibility to determine the necessary
frequency to check and maintain any IP rating seals and/or air
filters dependant on the environment in which the product is
installed. Eaton assumes no liability for the lack of appropriate
user maintenance measures.
IP65 rated seals
IP55 rated Air Filter present on side of the enclosure
mDANGER!
Handle operation
The switch handle may be either contained internally or externally
to the enclosure.
When the switch handle is located within the enclosure (inter-
nally), a key is required to unlock and open the enclosure door or
cover. All internal conductive parts are shielded so that the switch
can be safely turned off with minimal risk to the operator. These
shields must not be removed or tampered with, and are rated to
IP20. Failure to adhere to this warning could cause an accident
resulting in serious injury or death. It is a requirement that all live
internals are shielded for safety purposes.
Where an external handle is present, an interlocking system is in
place so that the enclosure cannot be opened whilst the combiner
box is on. Any attempts to override this system are done so at the
users own risk, as per interlocking door and switch, page 10.
The handle must be in the off position before the combiner box may
be opened, using the supplied key. The handle is off in the vertical
position, and the horizontal position when the system is on.
Figure 2. Switch handle positions

9
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
mDANGER!
Safety Instructions
Electric shock
Eaton’s Bussmann series combiner box operates at extremely high
voltages and its internal components are live. Whilst every effort
has been made to ensure the internals are completely shielded
and IP20 touch safe, work must only be carried out on the
combiner box if the switch disconnect is in the OFF position and
the combiner box is no longer under load. Even then work must
only be carried out by an electrically skilled person. Please be
aware that during daylight hours, even whilst disconnected from
load, 1000VDC potential may be present within the combiner box.
Operating a damaged combiner box may cause fatal injury from
electric shock.
• Ensure the combiner box receives regular maintenance.
• Ensure that any safety equipment is accessible at all times,
ensure that it is in good working condition on a regular basis.
In the event of a ground fault, assume that grounded PV plants
are still live. Ensure no voltage is present before touching the
combiner box components.
mCAUTION!
Burn hazards
The combiner box and its components can become hot during
operation.
• Please ensure personal safety protection is worn at all times
when working on the combiner box.
NOTICE
Damage to the Eaton’s Bussmann series combiner box
To ensure that the combiner box is not damaged by untrained
personnel:
• Ensure the combiner box is locked and the keys removed and
stored in a safe place.
Electrostatic discharge
Electrostatic discharge can destroy the sensitive electronic compo-
nents within the Eaton’s Bussmann series combiner box.
• Observation of the ESD safety regulations and wearing protec-
tive gloves will prevent damage.
• Conduct any electrostatic charges away from the electronic
components before touching them. This is done by touching the
unpainted, grounded parts of the enclosure.
mWARNING!
Product warning labels
Hazard and warning labels are applied internally and externally to
the combiner box. On the outside of the combiner box, a vinyl
or sticky back ‘Danger – High Voltage’ label is applied. Internally,
labels are used to state the hazard presented by the live parts
of the combiner box. This label is highly visible on all shrouding
within the combiner box.
The word ‘Danger’ is defined as a “hazardous situation which, if
not avoided, will result in death or serious injury.” This indicates
the level of hazard which could be encountered, should the main-
tenance engineer fail to adhere to these warnings. These labels
are typically applied to areas which are IP20 “touch safe”, but also
experience high voltages and currents. Failure to adhere to these
warnings could therefore result in death or serious injury.
Example warning labels
mDANGER!
Service and maintenance
During any service or maintenance of the Eaton’s Bussmann
series combiner box all safety instructions, notices, and warning
labels must be observed and followed at all times. Any work
carried out must only be carried out by an electrically skilled
person, following local laws and regulations. As a minimum the
following steps should be followed:
1. Where present the combiner box switch disconnector should be in the OFF
position.
2. If no combiner box switch disconnector is present then steps must be taken
to safely isolate the combiner box from any system load. Ensure all system
switch disconnectors are in the OFF position. Ensure the inverter or inverters
are ether off or isolated from the combiner box.
3. Follow all necessary ‘Tag out, Lock out’ safety procedures.
4. DO NOT OPEN FUSE HOLDERS UNDER LOAD.
5. Use appropriate and calibrated test equipment to safely ensure current is
zero and confirm the combiner box is fully isolated from any system load.
6. ONLY when the combiner box is 100% isolated can the fuse holders be
opened.
7. Open ALL fuse holders to remove voltage potential from within the combiner
box.
8. Complete any maintenance or service continuing to observe all safety
instructions, notices and warning labels.
9. Do not remove or alter any safety covers installed within the combiner box.
10. ONLY when any maintenance or service is complete and ensuring the
combiner box is still 100% isolated can the fuse holders be closed.
11. Follow all necessary ‘Tag out, Lock out’, safety procedures and system
re-energisation procedures before re-connecting the combiner box to the
system load.
12. Finally ensure all safety covers, doors and locks are closed and secure.

10
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
mWARNING!
Interlocking door and switch
The combiner box is designed to be disconnected from load
before allowing the door to be opened. Failure to disconnect the
switch prior to opening the combiner box could result in death
or serious injury. The door must only be opened using the key
provided once the switch has been turned to the off position.
Figure 3. Switch handle positions
A lockout/tagout feature is present for the combiner box and
should be used as per the image below.
Figure 4. Fitting of lockout/tagout padlock
The interlock may be overridden using the feature on the handle
as per the image on the left. This will allow the combiner box to
be opened whilst the internal electrical components are still live.
Therefore this feature should only be used at your own risk.
Defeating the interlock
in ON position
Figure 5. Overriding the interlock

11
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
Installation instructions
Please be advised that the unit may weigh up to 75kg. Please take
extra precaution when unpacking.
NOTICE
Unpacking and inspection
All Eaton’s Bussmann series combiner boxes are thoroughly
checked before they are packed and shipped. Although they are
shipped in sturdy packaging, damage can still occur during ship-
ping and delivery. It is important to carefully inspect the shipping
container and contents prior to installation. If you detect any
external damage after unpacking, report the damage immediately
to Eaton and the shipping company that delivered the unit.
If you require assistance in dealing with a damaged unit, please
contact Eaton on [phone].
Electrical connections
Bottom entry
Example bottom end view of a combiner box fitted with MC4
connectors. Positioning on this face may vary dependent on
individual design. If the design was fitted with glands, these would
occupy the same area as the MC4 Connectors shown in the
diagram. Positive and negative inputs and outputs will be marked
accordingly on the outside of the combiner box.
End view
Connection points for bottom entry
Position Item Notes
A IP65 rated breather drain Relieves internal condensation
B MC4 connectors or IP65
rated glands To connect PV string cables
C Output connection IP65
rated glands For customer output cables
D IP65 rated ancillary connec-
tion glands One gland per connection where appli- cable. May be used for wired communi-
cation entry points, PV DC earthing and
AC mains PSU where required.
Side entry
Example side entry view of a combiner box fitted with cable
glands. Positioning on this face may vary dependent on individual
design. If the design was fitted with MC4 connectors, these
would occupy the same area as the glands shown in the diagram.
mCAUTION!
Connection points for side entry
Position Item Notes
A IP65 Rated Breather Drain Relieves internal condensation
B MC4 Connectors or IP65
Rated Glands To connect PV string cables
C Output Connection IP65
Rated Glands For customer output cables
D IP65 Rated Ancillary
Connection Glands One gland per connection where appli- cable. May be used for wired communi-
cation entry points, PV DC Earthing and
AC Mains PSU where required.
Wiring preparation for gland inputs
In order to install PV cable where glands are specified, PV cable
must be stripped for a distance defined by the component of which
it is to be connected. This length is specified in the table below.
Component Wire strip length (mm)
10x38 modular fuse holder (up to and including 20A
fuse rating) 9
14x51 modular fuse holder (25A, 32A fuse rating) 12
Once the cable has been stripped to the required length, it
may then be inserted through the gland and into the associated
modular fuse holder. The modular fuse holder must then be tight-
ened to the required torque specified on page 12 – Torque values.
MC4 connectors
Where a connection must be made use MC4 connectors, it must
be noted that the male connectors are mounted on the negative
input side and female connectors on the positive input side. This is
to match the PV panel MC4 output cables.

12
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
mCAUTION!
Torque values
The following torque ratings must be applied to the assembly where
the stated components are used. If this is not adhered to, cabling
may become loose or remove itself from the connected component,
causing potential injury and damage to the combiner box.
Component Torque
value
(Nm)
Screw
thread
diameter
Max.
Cable
diameter
Tool required
MFH
10x38 indicating/non-
indicating 3 M6 4mm² PH2 screw driver
14x51 indicating/non-
indicating 4 M6 6mm² PH2 screw driver
DC switch (cage terminals not for use with aluminum cable)
Input cage terminals
(500A switch) 45 N/A 300mm² M20 allen key
Input cage terminals
(315 - 400A switch) 45 N/A 240mm² M20 allen key
Input cage terminals
(200 - 250A switch) 25 N/A 185mm² M16 allen key
Input cage terminals (up
to 160A switch) 14 N/A 95mm² M12 allen key
Cable lug (no cage ter-
minals supplied) 43 N/A N/A M17
External connection
Mains AC live 0.75 M3 4mm² 0.5 x 0.3
Mains AC neutral 0.75 M3 4mm² 0.5 x 0.3
Mains AC earthing
terminal 0.75 M3 4mm² 0.5 x 0.3
Modbus A & B 0.75 M3 4mm² 0.5 x 0.3
PV DC earthing
terminal 3 M5 4mm² 0.5 x 6
NOTICE
PV string connections
Gland input
Insert the PV string cable into the combiner box through the gland
as shown in the image below.
Connecting PV strings into glands
Ensure the cable meets either the 10 x 38 modular fuse holders
or the 14 x 51 modular fuse holders, and is fully inserted so that
no bare cable core is exposed. Tighten the modular fuse holders
using adequate torque as stated in the table in Torque values,
above.
NOTICE
MC4 connections
Positive (+) strings
Insert the positive (+) MC4 connectors. Insert into negative (-)
connectors and push together until you hear an audible tactile
click. The MC4 connector should not become loose, or wobble.
Connecting PV strings + MC4 connectors
Negative (-) Strings
Insert the Negative (-) MC4 connectors. Insert into Positive (+)
connectors and push together until you hear an audible tactile
click. The MC4 Connector should not become loose, or wobble.
Connecting PV strings - MC4 connectors
Ancillary cable connections
Insert the ancillary cable into the combiner box through the gland
as shown in the image below.
Connecting ancillary cables into glands
Your combiner box contains a bank of up to five terminal blocks
which are used to connect an AC power supply (where applicable)
and the modbus communication connections (monitored solutions
only). A typical bank is shown in the image below. Please check
your unique combiner box labelling to ensure that the correct
connections are made to the correct, corresponding terminal.
Ancillary cable terminal blocks

13
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
mWARNING!
Mounting
The box may be wall or stand mounted using a set of mounting
brackets designed for the selected enclosure. These are supplied
with the required screws in every combiner box, and must be
used if the box is to be wall or stand mounted. If the combiner
box has an external door, the enclosure must be mounted so that
the hinges are in the vertical plane.
Mounting brackets
The following guidelines should be adhered to when mounting
your combiner box. Mounting the combiner box is done so at
your own risk.
• Ensure the combiner box is mounted so that the connection
face is facing downwards.
• Do not mount the combiner box in an inclined position.
• Only the supplied mounting brackets may be used.
• Ensure there at least 2 people available to mount the combiner
box – it may weigh up to 75kg.
• Before installing the combiner box, ensure that none of the
exterior cable glands or plugs have been damaged in transit. If
this is the case, please contact Eaton [email protected]..
Mounting location requirements
The following guidelines should be adhered to when mounting
your combiner box. Mounting the combiner box is done so at your
own risk, as is customer selection of a mounting location.
• The mounting location should be in a well-ventilated area and
should not be a living area or office.
• The mounting locations should be safely accessible at all times
to aid any required servicing.
• No escape routes should be blocked as a result of the mounting.
• The location should be load bearing and suitable for both the
weight and the dimensions of the combiner box.
• The mounting location must not be exposed to direct sun light.
Take wall properties into account when mounting the combiner box.
1. Mark the position of the drill holes on the wall or stand.
2. Drill holes on the marked positions.
3. If necessary, insert the screw anchors.
4. Attach the mounting brackets with the screw supplied.
5. Fasten the combiner box to the wall or stand using suitable screws and
washers.
mCAUTION!
Mounting the combiner box
The combiner box may be wall or stand mounted using the supplied
kit. Different size combiner boxes have mounting brackets which are
applied in different manners, as per the diagrams below.
For external dimensions 1050 x 850 sized combiner boxes –
For all other sizes of combiner boxes -
Figure 6. Fitting mounting brackets

14
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
Monitoring solutions
The following chapter details specific operations and program-
ming parameters of the monitoring system contained within the
combiner box. This chapter contains the list of interface parameters,
the list of available registers with the relevant functions and the
explanation of the advantages and disadvantages of particular
functions.
After applying the supply voltage for about 5 seconds, the manufac-
turer information, then the module name and the software version,
e.g. Eaton, are displayed. Next, the main screen appears.
Figure 7. Example display screen
Press the button near the LCD display to view the available infor-
mation on the display. Each press of the button switches to the
display of the next current up to the current in the eighth string;
then further system parameters will be displayed whenever you
press the button: The display does not jump back to the main
screen, the last viewed screen remains displayed. Please note that
in EcoMode the backlight is turned off.
Connecting multiple interfaces
Cables
Use twisted-wire cables, with a screen if possible. Connect all bus
devices as a chain, one behind the other. For the chain configura-
tion the modules have doubled, internally linked through-connec-
tions (top and bottom): You use one bus connection as input, the
other as output to the next bus device. The order of top or bottom
is unimportant here.
Bus wiring for RS-485 or Modbus
Connect the screen of the bus cable flat with screen termi-
nals (no point contact). We recommend that the screens are
only earthed at one point and between the modules are only
connected one to the other.
Bus termination
To prevent signal reflections on the interface lines each section
(bus segment) must be terminated at its physical start and end
with a certain resistance. To do this, a terminating resistance is
connected between the bus lines A and B. The line A is then
connected via a pull-up resistor to +5 V and line B is connected via
a pull-down resistor to 0 V. This cascade of three resistors ensures
interference-free data transmission and defined potentials (voltage
levels) when no data is being transmitted over the bus (the inter-
face). The Type S1 string monitoring units PVCBM-GRI6 already
have these resistors built in. You activate the resistors via both DIP
switches; in this way both bus lines are connected to the resis-
tance circuit: Push the switches in the diagram on the right
upwards. The DIP switches must always be both actuated, i.e.
both set to on or both set to off.
DIP swTitches for activating the bus termination resistances;
current setting: OFF (down, default setting).

15
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
8 string monitoring units
Interface parameters
The type S1 string monitoring module PVCBM-GR8 supports the
modbus RTU protocol with the following interface parameters:
Baud rate 19.2 …115.2 Kb/s
Format 8n1, 8e1 or 8o1
Maximum cable length 1.2km
Unit Load 1/8
Byte order MSbit-LSBit
Word order LSByte-MSByte
Address range 1 – 247
Max. frame length 256 bytes
The following function codes are supported:
03 Read contents of a holding register
04 Read contents of an input register
06 Write contents of a R/W register (preset single register)
For reading the registers it holds:
Address basis Function code
for reading Function code for writing
Input register 30001 0x04 -
Holding register 40001 0x03 0x06
List of registers and functions
Abbreviations used Explanation
UINT16 Data type unsigned integer. 16 bit
UINT32 Data type unsigned integer. 32 bit
Float32 Data type float, 32 bit
R Only read access possible (read only)
R/W Read and write access possible (read/write)
Register
(integer) Data type Channel (descrip- tion) Possible values Unit R/W
0000 UINT16 Digital input 01 (Main
switch) 0: OFF 1: ON R
0001 UINT16 Digital input 02 (1000V
DC surge protection 0: NOK 1: OK R
0003 UINT16 Digital input 03 0, 1 R
0004, 0005 Float32 Current I1-20.00 … +20.00 A R
0006, 0007 Float32 Current I2-20.00 … +20.00 A R
0008, 0009 Float32 Current I3-20.00 … +20.00 A R
0010, 0011 Float32 Current I4-20.00 … +20.00 A R
0012, 0013 Float32 Current I5-20.00 … +20.00 A R
0014, 0015 Float32 Current I6-20.00 … +20.00 A R
0016, 0017 Float32 Current I7-20.00 … +20.00 A R
0018, 0019 Float32 Current I8-20.00 … +20.00 A R
0020, 0021 Float 32 Voltage 0 … 1000.0 V R
0028, 0029 Float32 Power 0 … 160000 W R
0036, 0037 Float32 Temperature 1 -40.0 … +160.0 °C R
0038, 0039 Float32 Temperature 2 -40.0 … +160.0 °C R
0042, 0043 Float32 Total current -160.00 … +160.00 A R
0044, 0045 UINT32 Date of the firmware 0xDDMMYYYY
Example:
0x040507DB
04.05.2011
R
0046, 0047 UINT32 Software version 0xBBBBMMNN
Example:
0x12510102
V1.02.1251
R
0048 UINT16 Error code 1: OK
≠1: NOK R
Register
(integer) Data type Channel (descrip- tion) Possible values Unit R/W
0059 UINT16 Sync ID1) User code of reg.
0302 R
0060, 0061 Float32 Sync_current I11) -20.00 … +20.00 A R
0062, 0063 Float32 Sync_current I2-20.00 … +20.00 A R
0064, 0065 Float32 Sync_current I3-20.00 … +20.00 A R
0066, 0067 Float32 Sync_current I4-20.00 … +20.00 A R
0068, 0069 Float32 Sync_current I5-20.00 … +20.00 A R
0070, 0071 Float32 Sync_current I6-20.00 … +20.00 A R
0072, 0073 Float32 Sync_current I7-20.00 … +20.00 A R
0074, 0075 Float32 Sync_current I8-20.00 … +20.00 A R
0076, 0077 Float32 Sync_voltage 0 … 1000.0 V R
0078, 0079 Float32 Sync_power 0 … 160000 W R
0080, 0081 Float32 Sync_temperature 1 -40.0 … +160.0 °C R
0082, 0083 Float32 Sync_temperature 2 -40.0 … +160.0 °C R
0084, 0085 Float32 Sync_total_current -160.00 … +160.00 A R
0099 UINT16 Relay status 0: OFF
1: ON R/W
0200 UINT16 Device ID e.g. 2005 R
0202 UINT16 Serial number low e.g. 14148 R
0203 UINT16 Serial number high e.g. 4 R
0205 UINT16 Modbus address 1 … 254 R/W
0206 UINT16 Type of current mea-
surement1) 0: OFF (Factory
setting)
1: Fast, 20ms
0208 UINT16 Response delay in ms3) 0 … 250 R/W
0300 UINT16 EcoMode4) 0: OFF (Factory
setting)
1: ON
R/W
0302 UINT16 Sync register1) User code
Write: Trigger sync R/W
Setting Specified value (decimal)
No parity (8n1) 0 … 5
Even parity (8e1) 100 … 105
Odd parity (8o1) 200 … 205
1200Bd 0 | 100 | 200
2400Bd 1 | 101 | 201
4800Bd 2 | 102 | 202
9600Bd 3 | 103 | 203
19.2kBd 4 | 104 | 204
38.4kBd 5 | 105 | 205

16
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
16 string monitoring units
Interface parameters
The type S1 string monitoring module PVCBM-GR16 supports the
modbus RTU protocol with the following interface parameters:
Baud rate 1200 to 38400 Bd
Format 8n1, 8e1 or 8o1
Max. cable length 1.2km
Unit load 1/8
Byte order MSBit-LSBit
Word order LSByte-MSByte
Address range 1 – 247
Max. frame length 256 Bytes
The following are supported as function codes:
03 Read contents of a holding register
04 Read contents of an input register
06 Write contents of a R/W register (preset single register)
Address basis Function code
for reading Function code for writing
Input register 30001 0x04 -
Holding register 40001 0x03 0x06
List of registers and functions
Abbreviations used Explanation
UINT16 Data type unsigned integer. 16 bit
UINT32 Data type unsigned integer. 32 bit
Float32 Data type floating, 32 bit
R Only read access possible (read only)
R/W Read and write access possible (read/write)
Register
(integer) Data type Channel (descrip- tion) Possible values Unit R/W
0000 UINT16 Digital input 01 (main
switch) 0: OFF 1: ON R
0001 UINT16 Digital input 02 (1000V DC overvoltage pro-
tection
0: NOK
1: OK R
0003 UINT16 Digital input 03 0, 1 R
0004, 0005 Float32 Current I1-30.00 … +30.00 A R
0006, 0007 Float32 Current I2-30.00 … +30.00 A R
0008, 0009 Float32 Current I3-30.00 … +30.00 A R
0010, 0011 Float32 Current I4-30.00 … +30.00 A R
0012, 0013 Float32 Current I5-30.00 … +30.00 A R
0014, 0015 Float32 Current I6-30.00 … +30.00 A R
0016, 0017 Float32 Current I7-30.00 … +30.00 A R
0018, 0019 Float32 Current I8-30.00 … +30.00 A R
0020, 0021 Float 32 Current I9-30.00 … +30.00 A R
0022, 0023 Float32 Current I10 -30.00 … +30.00 A R
0024, 0025 Float32 Current I11 -30.00 … +30.00 A R
0026, 0027 Float32 Current I12 -30.00 … +30.00 A R
0028, 0029 Float32 Current I13 -30.00 … +30.00 A R
0030, 0031 Float32 Current I14 -30.00 … +30.00 A R
0032, 0033 Float32 Current I15 -30.00 … +30.00 A R
0034, 0035 Float32 Current I16 -30.00 … +30.00 A R
0036, 0037 Float32 Summed current -480.00 … +480.00 A R
0038, 0039 Float32 Voltage 0 … 1000.0 V R
0040, 0041 Float32 Power 0 … 480.000 W R
0042, 0043 Float32 Temperature 1 -40.0 … +160.0 °C R
0044, 0045 Float32 Temperature 2 -40.0 … +160.0 °C R
0050, 0051 UINT32 Firmware date
0xDDMMYYYY
Example:
0x040507DB
04.05.2011
R
Register
(integer) Data type Channel (descrip- tion) Possible values Unit R/W
0052, 0053 UINT32 Software version
0xBBBBMMNN
Example:
0x12510102
V1.02.1251
R
0054 UINT16 Error code 1: OK
≠1: NOK R
0055 UINT16 Calibration status 1: OK 2: Busy
>2: Error number R
0059 UINT16 Sync ID1) User code of Reg.
0302 R
0060, 0061 Float32 Sync_current I11) -30.00 … +30.00 A R
0062, 0063 Float32 Sync_current I2-30.00 … +30.00 A R
0064, 0065 Float32 Sync_current I3-30.00 … +30.00 A R
0066, 0067 Float32 Sync_current I4-30.00 … +30.00 A R
0068, 0069 Float32 Sync_current I5-30.00 … +30.00 A R
0070, 0071 Float32 Sync_current I6-30.00 … +30.00 A R
0072, 0073 Float32 Sync_current I7-30.00 … +30.00 A R
0074, 0075 Float32 Sync_current I8-30.00 … +30.00 A R
0076, 0077 Float32 Sync_current I9-30.00 … +30.00 A R
0078, 0079 Float32 Sync_current I10 -30.00 … +30.00 A R
0080, 0081 Float32 Sync_current I11 -30.00 … +30.00 A R
0082, 0083 Float32 Sync_current I12 -30.00 … +30.00 A R
0084, 0085 Float32 Sync_current I13 -30.00 … +30.00 A R
0086, 0087 Float32 Sync_current I14 -30.00 … +30.00 A R
0088, 0089 Float32 Sync_current I15 -30.00 … +30.00 A R
0090, 0091 Float32 Sync_current I16 -30.00 … +30.00 A R
0092, 0093 Float32 Sync_summed_current -480 … +480 A R
0094, 0095 Float32 Sync_voltage 0 … 1000.0 V R
0096, 0097 Float32 Sync_power 0 … 480.000 W R
0098, 0099 Float32 Sync_temperature 1 -40.0 … +160.0 °C R
0100, 0101 Float32 Sync_temperature 2 -40.0 … +160.0 °C R
0200 UINT16 Device identification e.g. 2006 R
0202 UINT16 Serial number low e.g. 14148 R
0203 UINT16 Serial number high e.g. 4 R
0205 UINT16 Modbus address 1 … 254 R/W
0208 UINT16 Response delay in ms3) 0 … 250 R/W
0209 UINT16 Baud rate and parity For values refer to
table on Page… R/W
0300 UINT16 EcoMode4) 0: OFF (Factory
setting)
1: ON R/W
0302 UINT16 Sync register1) User code
Write: Trigger sync R/W
Setting Specified value (decimal)
No parity (8n1) 0 … 5
Even parity (8e1) 100 … 105
Odd parity (8o1) 200 … 205
1200 Bd 0 | 100 | 200
2400 Bd 1 | 101 | 201
4800 Bd 2 | 102 | 202
9600 Bd 3 | 103 | 203
19.2 kBd 4 | 104 | 204
38.4 kBd 5 | 105 | 205
For even parity and a baud rate of 9600 Bd enter 103 as the value.
The number of stop bits cannot be changed (always 1). The factory
setting is: no parity, 19.2 kBd

17
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
24 string monitoring units
Interface parameters
The type S1 string monitoring module PVCBM-GR24 supports the
modbus RTU protocol with the following interface parameters:
Baud rate 1200 to 38400 Bd
Format 8n1, 8e1 or 8o1
Max. cable length 1.2km
Unit load 1/8
Byte order MSBit-LSBit
Word order LSByte-MSByte
Address range 1 – 247
Max. frame length 256 Bytes
The following are supported as function codes:
03 Read contents of a holding register
04 Read contents of an input register
06 Write contents of a R/W register (preset single register)
For reading the registers the following therefore arises:
Address basis Function code
for reading Function code for writing
Input register 30001 0x04 -
Holding register 40001 0x03 0x06
List of registers and functions
Abbreviations used Explanation
UINT16 Data type unsigned integer. 16 bit
UINT32 Data type unsigned integer. 32 bit
Float32 Data type floating, 32 bit
R Only read access possible (read only)
R/W Read and write access possible (read/write)
Register
(integer) Data type Channel (descrip- tion) Possible values Unit R/W
0000 UINT16 Digital input 01
(main switch) 0: OFF 1: ON R
0001 UINT16 Digital input 02
(1000V DC overvolt-
age protection
0: NOK
1: OK R
0003 UINT16 Digital input 03 0, 1 R
0004,0005 Float32 Current I1-30.00 … +30.00 A R
0006, 0007 Float32 Current I2-30.00 … +30.00 A R
0008, 0009 Float32 Current I3-30.00 … +30.00 A R
0010, 0011 Float32 Current I4-30.00 … +30.00 A R
0012, 0013 Float32 Current I5-30.00 … +30.00 A R
0014, 0015 Float32 Current I6-30.00 … +30.00 A R
0016, 0017 Float32 Current I7-30.00 … +30.00 A R
0018, 0019 Float32 Current I8-30.00 … +30.00 A R
0020, 0021 Float 32 Current I9-30.00 … +30.00 A R
0022, 0023 Float32 Current I10 -30.00 … +30.00 A R
0024, 0025 Float32 Current I11 -30.00 … +30.00 A R
0026, 0027 Float32 Current I12 -30.00 … +30.00 A R
0028, 0029 Float32 Current I13 -30.00 … +30.00 A R
0030, 0031 Float32 Current I14 -30.00 … +30.00 A R
0032, 0033 Float32 Current I15 -30.00 … +30.00 A R
0034, 0035 Float32 Current I16 -30.00 … +30.00 A R
0036, 0037 Float32 Current I17 -30.00 … +30.00 A R
0038, 0039 Float32 Current I18 -30.00 … +30.00 A R
0040, 0041 Float32 Current I19 -30.00 … +30.00 A R
0042, 0043 Float32 Current I20 -30.00 … +30.00 A R
0044, 0045 Float32 Current I21 -30.00 … +30.00 A R
0046, 0047 Float32 Current I22 -30.00 … +30.00 A R
0048, 0049 Float32 Current I23 -30.00 … +30.00 A R
Register
(integer) Data type Channel (descrip- tion) Possible values Unit R/W
0050, 0051 Float32 Current I24 -30.00 … +30.00 A R
0052, 0053 Float32 Summed current -480.00 … +480.00 A R
0054, 0055 Float32 Voltage 0 … 1000.0 V R
0056, 0057 Float32 Power 0 … 480,000 W R
0058, 0059 Float32 Temperature 1 -40.0 … +160.0 °C R
0060, 0061 Float32 Temperature 2 -40.0 … +160.0 °C R
0062, 0063 UINT32 Firmware date 0xDDMMYYYY
Example:
0x040507DB
04.05.2011
R
0064, 0065 UINT32 Software version 0xBBBBMMNN
Example:
0x12510102
V1.02.1251
R
0066 UINT16 Error code 1: OK
≠1: NOK R
0067 UINT16 Calibration status 1: OK
2: Busy
>2: Error number
R
0069 UINT16 Sync ID1) User code of Reg.
0302 R
0070, 0071 Float32 Sync_current I11) -30.00 … +30.00 A R
0072, 0073 Float32 Sync_current I2-30.00 … +30.00 A R
0074, 0075 Float32 Sync_current I3-30.00 … +30.00 A R
0076, 0077 Float32 Sync_current I4-30.00 … +30.00 A R
0078, 0079 Float32 Sync_current I5-30.00 … +30.00 A R
0080, 0081 Float32 Sync_current I6-30.00 … +30.00 A R
0082, 0083 Float32 Sync_current I7-30.00 … +30.00 A R
0084, 0085 Float32 Sync_current I8-30.00 … +30.00 A R
0086, 0087 Float32 Sync_current I9-30.00 … +30.00 A R
0088, 0089 Float32 Sync_current I10 -30.00 … +30.00 A R
0090, 0091 Float32 Sync_current I11 -30.00 … +30.00 A R
0092, 0093 Float32 Sync_current I12 -30.00 … +30.00 A R
0094, 0095 Float32 Sync_current I13 -30.00 … +30.00 A R
0096, 0097 Float32 Sync_current I14 -30.00 … +30.00 A R
0098, 0099 Float32 Sync_current I15 -30.00 … +30.00 A R
0100, 0101 Float32 Sync_current I16 -30.00 … +30.00 A R
0102, 0103 Float32 Sync_current I17 -30.00 … +30.00 A R
0104, 0105 Float32 Sync_current I18 -30.00 … +30.00 A R
0106, 0107 Float32 Sync_current I19 -30.00 … +30.00 A R
0108, 0109 Float32 Sync_current I20 -30.00 … +30.00 A R
0110, 0111 Float32 Sync_current I21 -30.00 … +30.00 A R
0112, 0113 Float32 Sync_current I22 -30.00 … +30.00 A R
0114, 0115 Float32 Sync_current I23 -30.00 … +30.00 A R
0116, 0117 Float32 Sync_current I24 -30.00 … +30.00 A R
0118, 0119 Float32 Sync_summed_cur-
rent -480 … +480 A R
0120, 0121 Float32 Sync_voltage 0 … 1000.0 V R
0122, 0123 Float32 Sync_power 0 … 480.000 W R
0124, 0125 Float32 Sync_temperature 1 -40.0 … +160.0 °C R
0126, 0127 Float32 Sync_temperature 2 -40.0 … +160.0 °C R
0149 UINT16 Relay output 0: OFF
1: ON R/W
0200 UINT16 Device identification 2008 (124)
2007 (208)
2006 (116)
2005 (108)
R
0202 UINT16 Serial number low e.g. 14148 R
0203 UINT16 Serial number high e.g. 4 R
0205 UINT16 Modbus address 1 … 254 R/W
0206 UINT16 Configuration for
current measurement
register2)
0: default
1: fast R/W

18
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
Register
(integer) Data type Channel (descrip- tion) Possible values Unit R/W
0208 UINT16 Response delay in
ms3) 0 … 250 R/W
0209 UINT16 Baud rate and parity For values refer to
table below R/W
0300 UINT16 EcoMode4) 0: OFF (Factory set-
ting) 1: ON R/W
0302 UINT16 Sync register1) User code Write:
Trigger sync R/W
Setting Specified value (decimal)
No parity (8n1) 0 … 5
Even parity (8e1) 100 … 105
Odd parity (8o1) 200 … 205
1200Bd 0 | 100 | 200
2400Bd 1 | 101 | 201
4800Bd 2 | 102 | 202
9600Bd 3 | 103 | 203
19.2kBd 4 | 104 | 204
38.4kBd 5 | 105 | 205
For even parity and a baud rate of 9600 Bd enter 103 as the value.
The number of stop bits cannot be changed (always 1). The factory
setting is: no parity, 19.2 kBd
Advanced configuration options
To adapt the type S1 string monitoring module optimally to your
needs, you can use several parameters to control the behavior.
The following table provides an overview of the available options.
Mode Property Explanation Register
Measurement modes
Default Low noise, good noise suppression The values are written into the registers every second. Due to the longer measurement
time, however, the response time of the modbus communication is about 20ms. 206 = 0
Fast High measuring rates The values are written into the registers every 100ms. 206 = 1
Operating modes
Default Fast measuring value update The type S1 string monitoring module is permanently and fully operational. Power con-
sumption 1.4W. 300 = 0
Eco Minimal power consumption, power sup-
ply possible from PV system The metrological part is turned on only once per minute to perform the measurement and write the values into the registers. The display backlight is switched off. The communica-
tion part is permanently active. Power consumption 0.1W.
300 = 1
Data collection modes
Default Simple communication With several type S1 string monitoring modules on one bus, the data are collected
sequentially, i.e. with a time lag. -
Sync Synchronous measured values from all
modules in the system In the synchronized mode, the controller sends a broadcast value to all modules (register 302) these store the current measured values simultaneously in special registers. Then
the values are transmitted sequentially. Thus, all values will be collected simultaneously
even in large systems.
302
Delay
Default Short response times Requests from the bus master will be answered as quickly as possible. -
Delayed Adaptation to PLC reaction time Requests from the bus master will be answered only after the specified time. 208
You can carry out the measurement of the input currents and the
total voltage in two different ways:
1. In the default setting all the inputs are measured over about one
second (1000 ms) and this value is transferred to the registers.
Due to this relatively long measuring time, over which averaging
of the individual measurements of the ND converter occurs, the
noise content in the signal is low and you obtain good interfer-
ence suppression.
2. In the Fast mode (register 206 = 1) measurement takes place
only over about 100 ms (milliseconds). This means that you
obtain a high sample rate or refresh rate and the reaction time
on the Modbus interface (Response delay, refer also to Section
5.4.4) is reduced from approx. 20 ms to approx. 5 to 8 ms .

19
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
Monitoring unit configurations
EcoMode
Activating the EcoMode (register 300 = 1) enables you to drasti-
cally reduce the type S1 string monitoring module power demand:
from approx. 0.9 W to only 0.2 W.
To do this the measurement section in the type S1 string monitoring
module is switched off completely after each measurement and
also the display illumination. Every minute the measurement section
is activated for a new measurement and then switched off again.
The module communication section (modbus interface) is however
always active, i.e. the measurements can be read out any time. New
measurements are however only produced once per minute.
Synchronization of modules (data acquisition modes)
A problem with larger solar power systems arises due to the
serial transmission of data and the limited transmission speed of
the modbus link: The values of each PV string are normally inter-
rogated individually and sequentially. Consequently a time offset
arises between the data of the first (t1) and the last PV string (tn),
which can be in the range of several seconds. The measurements
are therefore not acquired synchronously and cannot be directly
compared. (With the type S1 string monitoring modules all PV
strings are acquired simultaneously within a module.)
The type S1 string monitoring modules offer you the possibility of
preventing this time delay in that you send a special command
simultaneously to all modules (broadcast) to “freeze” the current
measurements of all PV strings of all modules simultaneously.
Then you can interrogate and transmit these values consecutively
from all type S1 string monitoring modules. Although the data
here arrive at the controller with a time offset, the values them-
selves have been acquired simultaneously and synchronously.
Time offset due to serial communication in standard PV systems
Synchronous aquisition of all measurements of all PV strings with
type S1 string monitoring modules
Procedure
1. Send a broadcast message by writing a value in register 302 (sync register)
via the modbus address 0 (broadcast address). Thus, in each module, the
actual measured values are written into the (internal) registers 60 to 101 and
the broadcast value is transferred to register 59.
2. Now read out sequentially from all modules the measured values of the
individual strings from registers 60 to 101 and the value of register 302 from
register 59.
Since the modules transfer the measured values of the individual
strings simultaneously into the sync registers 60 to 101, this method
delivers synchronously acquired measurements of all PV strings.
Using the response delay
Depending on the measurement mode for the current and voltage
measurements the response time for a query (request) through the
modbus interface is between 5 and 20 milliseconds. You can use
register 208 to extend the time up to the response if this is too
fast for the modbus master used and, therefore, there is a risk that
responses are not recognized, because they were already available
on the bus shortly after the request. Specify the additionally desired
delay in milliseconds in register 208 as a numerical value.
Optional external connection port
Your Eaton’s Bussmann series combiner box is maybe fitted with
an external 9 pin male D-Sub connection port, to interrogate
modbus A and B commands at your convenience without opening
the enclosure. This connector is IP65 rated, achieved using a seal
around the inside edge of the connector. When the connector is
not in use, the IP65 rated cover must be replaced on the socket to
both protect it and maintain the ingress rating.
Optional external connection port
The pins of the connector are mapped as below –
Pin configuration for optional external connection port
Optional wireless communications
Your Eaton’s Bussmann series combiner box may be fitted with
either a Eaton’s Bussmann series industrial wireless or zigbee
wireless communications unit, enabling remote connection to
the combiner box without the need for additional communication
wiring. Please refer to the specific wireless instruction manuals
relevant to the type of wireless unit installed in your combiner
box.

20
Technical Data MN019001EN
Effective November 2015
Bussmann series
PV Combiner box
EATON www.eaton.com
NOTICE
Replaceable parts
Fuses
Eaton recommends replacing blown PV Fuses with Eaton’s
Bussmann series PV Fuse links. Fuse links must be of the same
rating as that which is being replaced, and must be for the same
system voltage. A complete list of Eaton’s Bussmann series PV
fuse links for 600VDC and 1000VDC systems is shown below.
System
Voltage
Fuse
Size
Current
Rating
Part No. Description
1000 VDC
10 x 38
1A PV-1A10F 10x38 1000VDC 1A gPV Fuse
2A PV-2A10F 10x38 1000VDC 2A gPV Fuse
3A PV-3A10F 10x38 1000VDC 3A gPV Fuse
3.5A PV-3-5A10F 10x38 1000VDC 3.5A gPV Fuse
5A PV-5A10F 10x38 1000VDC 5A gPV Fuse
6A PV-6A10F 10x38 1000VDC 6A gPV Fuse
8A PV-8A10F 10x38 1000VDC 8A gPV Fuse
10A PV-10A10F 10x38 1000VDC 10A gPV Fuse
12A PV-12A10F 10x38 1000VDC 12A gPV Fuse
15A PV-15A10F 10x38 1000VDC 15A gPV Fuse
20A PV-20A10F 10x38 1000VDC 20A gPV Fuse
14 x 51 25A PV-25A14F 14x51 1000VDC 25A gPV Fuse
32A PV-32A14F 14x51 1000VDC 32A gPV Fuse
600 VDC 10 x 38
4A PVM-4 10x38 600VDC 4A gPV Fuse
5A PVM-5 10x38 600VDC 5A gPV Fuse
6A PVM-6 10x38 600VDC 6A gPV Fuse
7A PVM-7 10x38 600VDC 7A gPV Fuse
8A PVM-8 10x38 600VDC 8A gPV Fuse
9A PVM-9 10x38 600VDC 9A gPV Fuse
10A PVM-10 10x38 600VDC 10A gPV Fuse
12A PVM-12 10x38 600VDC 12A gPV Fuse
15A PVM-15 10x38 600VDC 15A gPV Fuse
20A PVM-20 10x38 600VDC 20A gPV Fuse
25A PVM-25 10x38 600VDC 25A gPV Fuse
30A PVM-30 10x38 600VDC 30A gPV Fuse
SPD modules
Your Eaton’s Bussmann series combiner box may contain a
number of surge protection devices (SPD) to protect against
damaging over voltage conditions. There are three types of SPD
available for your combiner box, PV T1, PV T1/T2, PV T2; IEC mains
T2 and Modbus RS-485 communications C2/D1. Each type of
SPD is designed to safely shunt damaging overvoltage surges
to ground, minimising the risk of harm to the equipment and
personnel.
Each SPD consists of a base and module. When a voltage surge
occurs, Eaton’s SPDs are designed so that only the module needs
to be replaced. Replacement module part numbers are as per the
table below.
BSPS31000PV PV SPD, T1, 1000V DC
Replacement module N/A
SPPVT12-06-2-PE
SPPVT12-06-2-PE-AX
PV SPD, T1/T2, 600V DC (-AX with remote)
Replacement module SPPVT12-06
SPPVT12-10-2-PE
SPPVT12-10-2-PE-AX
PV SPD, T1/T2, 1000V DC (-AX with remote)
Replacement module SPPVT12-10
SPPVT2-06-2-PE
SPPVT2-06-2-PE-AX
PV SPD, T2, 600V DC (-AX with remote),
Iscpv = 160A
Replacement module SPPVT2-06
SPPVT2-10-2-PE
SPPVT2-10-2-PE-AX
PV SPD, T2, 1000V DC (-AX with remote),
Iscpv = 160A
Replacement module SPPVT2-10
SPPVT2H-06-2-PE
SPPVT2H-06-2-PE-AX
PV SPD, T2, 600V DC (-AX with remote),
Iscpv = 1000A
Replacement module SPPVT2H-06
SPPVT2H-10-2-PE
SPPVT2H-10-2-PE-AX
PV SPD, T2, 1000V DC (-AX with remote),
Iscpv = 1000A
Replacement module SPPVT2H-10
SPCT2-280-2 IEC T2, 230V AC, 2 Pole
Replacement module SPCT2-280
SPCT2-280-1-NPE IEC T2, 230V AC, 1 Pole + 1 NPE Pole
Replacement module SPCT2-280
SPCT2-NPE60
BSPD5DINLHF RS-485 SPD for date communications
Replacement module N/A
PV T2 SPD
IEC T2 2-pole SPD
Service items
In addition to fuses and SPD modules, there are service items for
which replacements are available from Eaton. These include –
• IP68 rated glands (input and output)
• IP66 rated breather drains
• IP65 rated cover for external communications port
• Combiner box key
If you require any of these components please contact Eaton on
[phone], with your product number and unique ID
number ready.