Riello UPS MASTER HE User manual

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User Manual
MASTER HE 300 ÷ 800 kVA three phase output

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RPS SpA
Viale Europa 7
37045 Legnago (VR) Italy
www.riello-ups.com

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Thank you for choosing our product.
RPS S.p.A. is highly specialized in the development and production of uninterruptible power supplies (UPS).
The UPSs of this series are high quality products, carefully designed and manufactured to ensure optimum
performance.
Symbols used in the manual
In this manual, some operations are shown by graphic symbols to alert the reader to the dangerous nature of the
operations:
Possibility of serious injury or substantial damage to the device, unless adequate
precautionary countermeasures are taken.
This symbol indicates some important information which must be read with care.
It is recommended to read this part of the manual.
Protective equipment to be worn
No maintenance operations must be carried out on the device without wearing the Personal Protective Equipment
(PPE) described below.
Personnel involved in the installation or maintenance of the equipment must not wear clothes with wide sleeves or
laces, belts, bracelets or other items that may be dangerous, especially if they are metallic. Long hair must be tied in
such a way as to ensure that it is not a hazard.
The following signs show the protective equipment that should be worn. The various items of PPE must be selected
and sized according to the nature of the hazard (particularly electrical) posed by the equipment.
Accident prevention footwear
Use: always
Protective eyewear
Use: always
Protective clothing
Use: always
Helmet
Use: When there are suspended loads
Work gloves
Use: always

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Definition of “operator” and “specialized technician”
The professional figure responsible for accessing the equipment for ordinary maintenance purposes is defined with
the term operator.
This definition covers personnel that know the operating and maintenance procedures for the equipment, and that
have been:
1. trained to operate in accordance with the safety standards relating to the dangers that may arise where
electrical voltage is present;
2. trained to use Personal Protective Equipment and to carry out basic first aid.
The professional figure responsible for the installation and start-up of the equipment, and for any extraordinary
maintenance, is defined with the term specialized technician.
This definition covers personnel that, in addition to the requirements listed above for a general operator, must also:
1. have been suitably trained by the manufacturers or their representative.
2. be aware of installation, assembly, repair and service procedures, and have a specific technical
qualification.
3. must have a background of technical training, or specific training relating to the procedures for the safe use
and maintenance of the equipment.
Emergency interventions
The following information is of a general nature.
First aid interventions
Company regulations and traditional procedures should be followed for any first aid intervention that may be
required.
Firefighting measures
1. Do not use water to put out a fire, but only fire extinguishers that are suitable for use
with electrical and electronic equipment.
2. If exposed to heat or fire, some products may release toxic fumes into the atmosphere.
Always use a respirator when extinguishing a fire.

0MNMHEM30RUENUB 00 pag. 5 / 57
GENERAL PRECAUTIONS
This manual contains detailed instructions for the use, installation and start-up of the MASTER HE . Read
the manual carefully before installation. For information on using the MASTER HE , the manual should be
kept close at hand and consulted before carrying out any operation on the device.
This device has been designed and manufactured in accordance with the standards for the product, for normal
use and for all uses that may reasonably be expected. It may under no circumstances be used for any purposes
other than those envisaged, or in any other ways than those described in this manual. Any interventions should
be carried out in accordance with the criteria and the time-frames described in this manual.
PRECAUTIONS AND SAFETY REGULATIONS
Refer to the “Safety and Compliance Manual” supplied with the UPS (0MNA141_NE).
ENVIRONMENTAL PROTECTION
In the development of its products, the company devotes abundant resources to analysing the
environmental aspects.
All our products pursue the objectives defined in the environmental management system developed by
the company in compliance with applicable standards.
No hazardous materials such as CFCs, HCFCs or asbestos are used in this product.
When evaluating packaging, the choice of material has been made favouring recyclable materials.
For correct disposal, please separate and identify the type of material of which the packaging is made in the table
below. Dispose of all material in compliance with applicable standards in the country in which the product is used.
DESCRIPTION
MATERIAL
Pallet
Wood
(FOR)
Package box
Corrugated cardboard
(PAP)
Protective bag
High density polyethylene
(PE-HD)
Bubble wrap
Low density polyethylene
(PE-HD)
DISPOSING OF THE PRODUCT
The UPS contain electronic cards and batteries which are considered TOXIC and HAZARDOUS waste. When the
product reaches the end of its operating life, dispose of it in accordance with applicable local legislation.
Disposing of the product correctly contributes to respecting the environment and personal health.
The reproduction of any part of this manual, in whole or in part, is forbidden without the prior consent of the
manufacturer. In order to make improvements, the RPS S.p.A. reserves the right to modify the product described at
any moment and without notice.

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This page is left blank intentionally

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CONTENTS
1. PRELIMINARY OPERATIONS ...............................................................................9
1.1 Removing the packaging and positioning the device......................................................9
1.2 Storage............................................................................................................................9
1.3 Handling.........................................................................................................................9
2. INSTALLATION ENVIRONMENT.........................................................................10
2.1 Ambient conditions:......................................................................................................10
2.2 Dimensions of the premises..........................................................................................10
2.3 Cooling of the premises................................................................................................11
2.4 Air change for battery premises ...................................................................................11
3. MASTER HE IN SINGLE CONFIGURATION....................................................12
3.1 Set-up of the electrical system......................................................................................12
3.1.1 Input.................................................................................................................................................12
3.1.2 Selectivity.........................................................................................................................................13
3.1.3 Battery..............................................................................................................................................14
3.1.4 neutral conductor.............................................................................................................................14
3.1.5 Differential (RCD) ...........................................................................................................................15
3.1.6 Backfeed protection .........................................................................................................................16
3.1.7 Emergency power off device (EPO).................................................................................................16
3.2 Mains, load and battery connections............................................................................17
3.3 Connection of signals and remote commands..............................................................19
3.3.1 EPO connector (emergency power off control) ...............................................................................19
3.3.2 REMOTE COMMANDS AND ALARMS ..........................................................................................19
3.3.3 RS232...............................................................................................................................................20
3.3.1 Parallel (optional)............................................................................................................................21
3.3.2 SLOTS 2-1........................................................................................................................................21
3.3.3 REMOTE ALARMS (2 optional cards) ............................................................................................22
3.3.4 MODEM (optional).........................................................................................................................22
3.3.5 MULTI I / O (optional) ................................................................................................................22
3.3.6 REMOTE PANEL (OPTIONAL) ......................................................................................................22
3.3.7 Dual Bus System –UGS (optional)..................................................................................................22
3.3.8 SWOUT and SWMB aux - External temperature sensor (optional).................................................23
3.4 Start-up procedure........................................................................................................26
3.4.1 Battery operation check ...................................................................................................................27
3.5 Operating modes...........................................................................................................28
3.5.1 On - line - factory setting -..............................................................................................................28
3.5.2 Standby-on / Smart active................................................................................................................28
3.5.3 Standby-off (with mains present the load is not powered) ..............................................................29
3.5.4 Stabilizer (operation in on-line mode without battery)...................................................................29
3.5.5 Frequency converter (from 50 to 60Hz or vice versa) .....................................................................29
3.6 Personalizations ...........................................................................................................30
3.7 Procedure to transfer the load from UPS onto maintenance bypass..........................30
3.8 UPS and load shutdown ...............................................................................................31
3.9 Block diagram...............................................................................................................32
3.10 Components of the block diagrams ..............................................................................33

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4. MASTER HE IN PARALLEL CONFIGURATION................................................36
4.1 Introduction..................................................................................................................36
4.2 Electrical system set-up................................................................................................37
4.2.1 Input................................................................................................................................................. 37
4.2.2 Differential....................................................................................................................................... 37
4.2.3 Emergency power off device (EPO)................................................................................................. 37
4.2.4 External maintenance bypass. ...................................................................................................... 38
4.3 Mains, load and battery connections. ..........................................................................39
4.3.1 UPS AC input / output power connection........................................................................................ 39
4.3.2 Power connections battery side....................................................................................................... 40
4.4 Connection of signals...................................................................................................42
4.5 Start-up procedure ....................................................................................................... 44
4.6 Operating modes ..........................................................................................................45
4.7 bypass for maintenance................................................................................................ 47
5. MAINTENANCE ................................................................................................51
6. GENERAL CHARACTERISTICS...........................................................................53
7. APPENDIX A-REMOTE COMMANDS AND ALARMS CARD -................................56

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1. Preliminary operations
1.1 Removing the packaging and positioning the device
On delivery, the packaging must be inspected to ensure that it is whole and that it has not been crushed or dented.
Check in particular that neither of the two impact resistant devices on the packaging is red; if one of them is red,
follow the instructions on the packaging.
The essential details of the device are provided on the shipping document. The marking, weight and dimensions of
the various items making up the packing list are shown.
Check the state of the device by means of a visual inspection of both the inside and the outside. Any dents seen
mean that it has suffered knocks during shipping, which could compromise the normal operation of the device.
1.2 Storage
In the following situations:
- installation not immediately after delivery;
- de-installation and storage while awaiting relocation,
place the device in covered premises that are protected from direct contact with atmospheric agents and dust. The
following environmental values are those allowed in the storage area:
Temperature: -25 ÷ + 60 °C
Relative humidity: 30 ÷ 95 % max.
For the installation of a battery cabinet, if provided with the uninterruptible power supply, follow the
instructions given in the specific manual.
The list of material provided may vary depending on the order specifications. As a general rule, the packaging
should include the following: this manual, the installation drawing, the warranty and eventual accessories.
1.3 Handling
The equipment must only be handled by adequately trained personnel. It can be unloaded from the vehicle and put
into place by lifting the box or the wooden deck to which the equipment is secured with a fork-lift truck. A
transpallet or fork-lift truck should be used for the permanent positioning of the equipment, in accordance with the
instructions provided below.

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1Insert the forks of the fork-lift truck in the lower part of the device, from the front or back, and ensure
that they stick out about 30 cm on the other side.
If a transpallet is used, raise the device only as much as is strictly necessary.
2Secure the device to the transpallet or fork-lift before moving it.
Risk of overturning
In order to avoid the risk of the device overturning, ensure that it is firmly secured to the transpallet or fork-
lift truck by means of appropriate ropes before moving it.
When being moved the cabinet should be handled with care; knocks or drops can damage it. Once in position,
remove the packaging carefully in order not to scratch the device.
The packaging should be removed as follows:
1. Cut the bands
2. Slide away the carton from above.
3. Remove the screws securing the cabinet to the wooden base.
4. If using a transpallet, remove the device from the pallet and set it on the floor, using the same
precautions as set out in the section on Handling.
2. Installation environment
The MASTER HE and the battery cabinet have been designed for indoor installation. The choice of premises for
installation should comply with the points set out below.
2.1 Ambient conditions:
ensure that the floor can support the weight of the UPS and of any battery cabinet that may be used;
avoid dusty environments;
avoid narrow environments that could hinder normal maintenance operations;
avoid placing the device in areas exposed to direct sunlight or heat;
ensure that the ambient temperature conforms to the following:
minimum operating temperature: 0 °C
maximum temperature for 8 hours a day: + 40°C
average temperature for 24 hours: + 35°C
max relative humidty: 95 % without condensation
Max installation height: 1000 m at rated power
(-1% power for every 100 m above 1000 m) max 4000 m
2.2 Dimensions of the premises
For the mechanical dimensions of the cabinets, refer to the “INSTALLATION DRAWINGS”supplied with the UPS
and with the battery cabinet, if present. These drawings provide the following data:
the position of the holes in the base to secure the device to the floor, if applicable;
the view of the floor support for the sizing of a structure to raise the cabinet, if applicable;
the position of cable entry;
the position of the fans on the top of the UPS, for the positioning of a structure to convey the warm air
discharged by the equipment outside the premises, if applicable;
the input, output and battery cables section;
the power dissipated by the equipment (kW).

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2.3 Cooling of the premises
The recommended operating temperature for the lifetime of the UPS and of the batteries is between 20 and 25°C.
The lifespan of the battery depends on the operating temperature; with an
operating temperature of between 20°C and 30°C, the lifespan of the
batteries is halved.A heat dissipation system is required to keep the
temperature of the premises housing the equipment within the field 20÷25°C.
The heat dissipation needed for the correct operation of the UPS is brought
about by the air current made by the fans located inside the UPS (forced
convection) and by the air around the side panels (natural convection).
In order to ensure proper air circulation, and therefore the correct operation
of the UPS, measures must be taken during installation to avoid any
obstructions to the free circulation of air. These include the following:
ensure a distance of at least 60 centimetres from the ceiling, so as not to
hinder air extraction,
leave a free space of at least one metre at the front of the equipment to
ensure both the circulation of the air and installation and maintenance
operations;
With natural convection the thermal load is dissipated to the outside
through the walls; thus a cabinet placed against a wall or in a hollow
dissipates less heat than one located in a free environment.
The following rule must be observed:
leave at least one of the three side walls free: right, left or back.
the side strips must not be mounted for installations where cabinets are placed side by side.
2.4 Air change for battery premises
The room in which the battery box is installed must be provided ventilated so as to keep the concentration of
hydrogen generated during charging within safe limits. The room should preferably be ventilated naturally; if it
cannot be, forced ventilation may be employed. Standard EN 50272-2 regarding air exchange provides that the
minimum aperture must satisfy the following equation:
A = 28 x Q = 28 x 0.05 x n x Igas x C10 (1/10³) [cm²]
where: A = surface free of air input/output opening; Q = air flow to be exhausted [m³/h];
n = number of battery elements; C10 = battery capacity in 10 hours [Ah];
Igas = gas producing current [mA//Ah]
according to the standard:
Igas = 1 in backup charging for VRLA type batteries (*); Igas = 8 in fast charging for VRLA type batteries (*)
(*) for open vessel or nickel batteries, contact the battery manufacture for details.
- example calculation
Type of battery: VRLA; Number of elements: 240 (40 mono-blocks)
Capacity: 120Ah; Igas (**): 8 (fast charging)
A = 28 x Q = 28 x 0.05 x n x Igas x C10=28 x 0.05 x 240 x 8 x 120 x 1/10³ = 322 cm2
(**) to increase the safety margin, we take the fast charging condition, well aware that the battery mostly runs in
backup charging mode. Using the backup charging value for Igas would result in a value of one eighth of the above.
The air intake/outlet must be located so as to be most favourable to circulation, e.g.:
- openings on opposing walls;
- with a minimum distance of 2 m if both on the same wall.

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3. MASTER HE in single configuration
3.1 Set-up of the electrical system
3.1.1 Input
The UPS input must have a max. current protection device for the section of line coming from the distribution panel
as well as for the two inputs into the MASTER HE : the rectifier line and the bypass line.
The protection device should be sized according to the situation, as follows:
a) single power line
b) main power supply and separate bypass
a) Single power line
The UPS input must have a max. current
protection device for the section of line coming
from the distribution panel. The fuse represented
with the letter F.
b)main power supply and separate bypass
When there are two separate power lines, the main
power line and the bypass line, two protection
devices must be provided (indicated with the letters
Fand Gin the drawing b), one for each line.
MAINS LINE
+/-
LOAD
UPS
BATTERY CABINET
F
SWBY
SWIN
SWOUT
300
400
500
600
800
Input line
refer to the “INSTALLATION DRAWINGS”
Imax (100% load, and battery recharging)
External [F] fuse type gG (*) [A]
(*) or equivalent circuit breakers
MAINS LINE
+/-
LOAD
UPS
BATTERY CABINET
F
SWBY
SWIN
SWOUT
BY-PASS LINE
G
300
400
500
600
800
mains line
refer to the “INSTALLATION DRAWINGS”
Imax (100% load, and battery recharging)
External [F] fuse type gG (*) [A]
bypass line
Current
refer to the “INSTALLATION DRAWINGS”
External [G] fuse type gG (*) [A]
(*) or equivalent circuit breakers

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3.1.2 Selectivity
The system where the UPS is inserted must be set up in such a way that in the event of a shortcircuit on one of the
lines downstream of the UPS, the
fuse on the output opens while the
upstream fuse normally works. This
is known as selectivity, and ensures
that the remaining feeders maintain
the power supply.
In order to select the correct
protection devices to be inserted
downstream of the MASTER HE ,
the following two operating modes
have to be taken into consideration:
mains power supply and battery
power supply.
With mains power supply the output fuse must be selective with the input fuse; the condition is verified for the
following values:
[kVA]
300
400
500
600
800
Rated output current: [A]
433
578
722
867
1155
Type gG fuse used at the UPS input
(as shown in the table of connections) [A]
500
630
800
1000
1250
Maximum fuse at the UPS output for selectivity:
Fuse size for type gG fuse [A]
315
400
500
630
800
Fuse size for type aM fuse [A]
200
250
315
400
500
At least two feeders are necessary in order to use the UPS at rated load with fuses of type gG.
With battery power supply (first fault) in the event of a shortcircuit on one of the outputs (second fault) it must be
possible for the fuse to be open before the inverter shuts down.
If the shortcircuit is of the three-phase type, the inverter can supply a current for 1 second that is 1.8 times the value
of the rated current of the UPS output (with a single phase shortcircuit the current is around 3 times the value).
In the worst-case scenario, that is a three-phase shortcircuit then a smaller current, the condition occurs if:
[kVA]
300
400
500
600
800
Rated output current: [A]
433
578
722
867
1155
Shortcircuit current (three-phase) 1.8 times the rated output current for 1 second
Maximum fuse at the UPS output for selectivity:
Fuse size for type gG fuse [A]
125
125
160
200
250
Fuse size for type aM fuse [A]
80
100
125
160
200
At least five feeders are necessary in order to use the UPS at rated load with fuses of type gG.
To sum up, when there is a shortcircuit on the output, there are two alternatives if only the line affected by the
shortcircuit is to be isolated; let us consider the example of the 300kVA:
selectivity with both mains power supply and battery power supply;
the load has to be shared between at least five feeders, each sized at 20% of the rated power.
selectivity, with mains power supply only:
since it is considered unlikely that after a first fault a second fault will occur in the limited time of
operation from the battery, it is sufficient to share the output between two lines, each sized for
50% of the rated power.
H
+/-
LOAD
UPS
SWBY
SWIN
SWOUT
+/-
BATTERY CABINET

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3.1.3 Battery
BATTERY CABINET
For connection to the UPS, the battery cabinet must have an overcurrent protection device and a
disconnecting device which ensure the disconnection of both the polarites
The disconnector may be closed only when the UPS is started up regularly; see the section “Start-up
procedure” on page 26.
The function of the fuses is to protect the batteries and the cables from a shortcircuit between the battery cabinet and
the UPS. The following rules should be observed for their sizing:
if rapid fuses of the type gl / gG are installed: the maximum size of fuse to be used is 2 times the
battery capacity in Ah.
If ultra rapid fuses of the type aR are installed: the maximum size of fuse to be used is 2.5 times
the battery capacity in Ah.
For example: the following fuses may be used for batteries of the type 150Ah: 315A type gl/gG or 355A type aR.
For the section of the cable for the UPS to battery connection refer to the following current value:
3.1.4 neutral conductor
Do not connect the output neutral to ground.
The use of an isolation transformer on the bypass line is required should it be necessary to modify the
neutral arrangements downstream of UPS.
300-400kVA
In normal operation SWBY and SWOUT switches are closed, the opening of the SWBY do not change the state of
the neutral output system
300-400kVA
The neutral state is not a function of position of the bypass line switch.
[kVA]
300
400
500
600
800
Battery
refer to the “INSTALLATION DRAWINGS”
Permanent battery eq. Current [A]
L2
L1
N
L3
L3
L1
L2
L2
L3
L1 Static
Switch
SWMB
SWBY
SWOUT
PE
L1
L2
L2
L1
N
L3
L3
PE
PE
(*)
UPS

0MNMHEM30RUENUB 00 pag. 15 / 57
500-800kVA
In normal operation SWBY and SWOUT switches are closed, the opening of the SWBY change the state of the
neutral output system
500-800kVA
The neutral state is function of position of the bypass line switch.
NOTE (*): place the label supplied (The following label, supplied with the UPS,
must be displayed on all
switchingdevices located upstream in the same electrical system as the UPS):
Before working on this circuit
- Isolate Uninterruptible Power System (UPS)
-Then check for Hazardous Voltage between all terminals
including the protective earth
Risk of Voltage Backfeed
3.1.5 Differential (RCD)
If the MASTER HE protection against electric shock uses differential current devices (RCD), these have to have
the following characteristics:
- Sensitivity 300mA
- sensitive direct current and unidirectional components (class B)
- insensitive to transient current pulses
- delay greater than or equal to 0.1 s.
When operating in the presence of mains supply, a differential breaker (RCD) installed on the input will intervene as
the output circuit is not isolated from the input circuit.
When operating without mains supply (from battery) the input differential breaker will intervene only if it is able to
switch as a result of leakage current without any voltage at its poles (for example a differential breaker with an
auxiliary relay is not suitable). However it is possible to install additional differential breakers on the output of the
UPS, possibly coordinated with those on the input.
L1
N
L3
L2
L1
L2
L3
L1
L2
L3
Static
Switch
SWMB
SWBY
SWOUT
PE
L2
L1
L2
N
L3
N
L3
L1
PE
PE
UPS
(*)

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3.1.6 Backfeed protection
The MASTER HE is provided with a device to prevent voltage backfeed on the input line due to an internal fault.
This protection device works by switching off the inverter if the current flow is faulty, thereby causing voltage
backfeed on the bypass line during operation from the inverter. If the fault occurs when the UPS is operating from
the battery, the load will not be powered.
Should it be required to avoid the shutting down of the inverter in order to keep the load powered by the inverter
even in the event of a double fault, the system can be customized to control the opening coil of a switch located
upstream by reprogramming one of the relays on the “REMOTE COMMANDS AND ALARMS”card.
The control logic allows the function of the relay to be reconfigured, for example for the backfeed alarm, and then
the free voltage contact can be used to control the triggering of a switch located on the UPS input.
3.1.7 Emergency power off device (EPO)
The UPS is pre-set to be connected to a remote emergency power off device as laid down in standard EN 62040-1-2.
If the remote device (not supplied with the equipment) is activated, the inverter output voltage is cut.
The connection procedure is shown below.
a -EPO terminal board located on the UPS
b - EPO switch (not provided).
On the MASTER HE , the jumper on the EPO terminals (page 19) must be removed, and the wires from the auxiliary
contact of the button must be connected in place of the jumper.
The contact must be closed with the button in the rest position and must open when the button is pressed.
UPS
a
b

0MNMHEM30RUENUB 00 pag. 17 / 57
3.2 Mains, load and battery connections
The operations described in this chapter must be carried out exclusively by a specialized technician. The
first connection to be made is the earth conductor.
The MASTER HE MUST NOT OPERATE WITHOUT AN EARTH CONNECTION
Connecting the UPS: Ensure that the earth conductor is connected first.
Disconnecting the UPS: Ensure that the earth conductor is removed last
Before making the connection, open all the switches on the device and ensure that the UPS is completely isolated
from the power sources: battery and AC power line. More specifically, check that:
- the UPS input line or lines are completely isolated;
- the battery cabinet disconnector / fuse (if present) is open;
- all the UPS disconnectors - SWIN, SWBY, SWOUT and SWMB - are in the open position (position 0);
- check with a multimeter that there are no dangerous voltages on the terminal board.
For connection of the power cables to the terminal boards, refer to the “INSTALLATION DRAWINGS”
provided with the UPS and with the battery cabinet, if present.
INPUT NEUTRAL
The power supply to the MASTER HE input ( bypass line) must be three-phase with neutral.
The neutral conductor is necessary only on bypass line.
Input line without neutral
The transformer must be inserted either on the mains supply line or on the bypass line (as shown in the drawings).
MAINS LINE
UPS
LOAD
3Ph+N
or
OPTIONAL
MAINS LINE
UPS
LOAD
3Ph+N
BY-PASS LINE
or
OPTIONAL
Single power line without neutral
main power supply and separate bypass without neutral

pag. 18 / 57 0MNMHEM30RUENUB 00
Battery connections
BATTERY CABINET if present:
For connection to the UPS, the battery cabinet must have an overcurrent protection device and a
disconnecting device. This disconnector must be closed only when the UPS is started up regularly. During
connection to the UPS the disconnector must stay in the open position.
CABINET DISCONNECTOR
For systems with more battery cabinets, use a Battery switch cabinet where the cables can be parallel-
connected (refer to the marketing department). For the sizing of the cables and connection procedures, refer
to the “INSTALLATION DRAWING” attached to the battery cabinet.
For back-up times requiring a greater number of Battery cabinets, contact the marketing department.
Battery switch cabinet
+
+
-
-
SW
Battery cabinet
UPS
-
+
Battery cabinet
SWBAT1
+
-
max 5 battery cabinet
SWBAT4
-+

0MNMHEM30RUENUB 00 pag. 19 / 57
3.3 Connection of signals and remote commands
To the position of the signal and remote connection, refer to the “INSTALLATION DRAWINGS” supplied with the
UPS.
3.3.1 EPO connector (emergency power off control)
If the jumper on the connector is opened, the voltage on the UPS
output will be cut.
The UPS is factory-fitted with the EPO terminals shortcircuited. If
this input is used, the UPS can be shut down in a hazardous
situation from a remote position simply by pressing a button.
If only the power supply is removed, for example by opening the
switch of the power supply panel, the UPS will keep the load
powered using the energy in the batteries
3.3.2 REMOTE COMMANDS AND ALARMS
The card is equipped with a terminal board with 12 positions which has the following:
POWER SUPPLY 1 power supply 12Vdc 80mA(max.) [pins 10 and 11];
ALARMS 3 potential-free change-over contacts for alarms;
COMMAND 1 command programmable from the panel [pins 11 and 12];
The functions of the three contacts and the command may be reprogrammed via the display panel. The ALARMS
and the COMMAND are factory-set in the following way:
- ALARMS
- RL1 Bypass / fault, the contact changes position when the UPS switches the load onto
the bypass line either during normal operation (e.g. due to overload) or as a
result of a fault in the inverter stage;
- RL2 Battery discharging, the contact changes position when the load is powered from
the battery due to a mains power failure;
- RL3 End of battery discharge, the contact changes position when, during a mains
outage, the remaining time for battery discharge has reached the minimum value
defined. Once this time has passed, the load will remain unpowered (the factory-
set end of discharge pre-alarm value is 5 minutes);
- COMMAND
IN 1 Inverter OFF. Connect pin 11 to pin 12 (for at least 2 seconds) .
- In “NORMAL OPERATION”,
if the INVERTER OFF command is received, the UPS switches the power supply
of the load onto the bypass line (load is not protected should there be a mains
outage).
- In “EMERGENCY OPERATION”,
if the STOP INVERTER command is received, the UPS shuts down (load is not
powered).
With the jumper present, the UPS remains switched on the bypass line when the
mains power supply is restored.
With no jumper present, the UPS will restart in NORMAL OPERATION.

pag. 20 / 57 0MNMHEM30RUENUB 00
The position of the contacts shown is without the alarm present. The contacts can take a max. current of 1A with
42Vac. Or 60Vdc.
Please refer to APPENDIX A for the list of alarms and commands that can be programmed. The change
of function may be made by the technical support personnel.
3.3.3 RS232
2 DB9 connectors are available for RS232 connection. The factory-set
transmission protocol is the following:
9600 baud, -no parity, -8 bits, -1 stop bit.
The transmission speed may be varied from 1200 to 9600 baud, using the
PERSONALIZATIONS menu on the CONTROL PANEL. Depending on
the distance of transmission, the recommended values for the transmission
speed are: 9600 baud 50m, 4800 baud 100m, 2400 baud 200m, 1200
baud 300m.
See the diagrams below for the connection procedure.
DB9 female RS232-2
For connection with a computer use a standard RS 232
cable. See the diagram for connection with a modem.
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
female
femmina
DB9
female
femmina
DB9
male
maschio
DB9
male
maschio
DB9
UPS
RS232-1
computer
Modem
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
6
7
8
9
female
femmina
DB9
female
femmina
DB9
male
maschio
DB9
male
maschio
DB9
UPS
RS232-1
1
2
3
4
5
6
7
8
9
10
11
12
12V -
+
RL 1
RL 2
RL 3
IN 1