Eaton Crouse-Hinds F892 User manual

MTL F892
8 Segment Redundant Fieldbus Power Supply for use
with non-proprietary cabled systems
March 2022
INM F890 Rev 1
Instruction manual
MTL fieldbus networks
DRAFT- 31st March 2022

ii
INM F892 Rev 1
THIS PAGE IS LEFT INTENTIONALLY BLANK

iii
INM F892 Rev 1
CONTENTS
1 OVERVIEW ........................................................................1
2 DESCRIPTION ......................................................................1
3 COMPONENTS AND ACCESSORIES ...................................................2
4 MECHANICAL ......................................................................3
4.1 Mounting Orientation ....................................................................3
4.2 Enclosure Requirements ..................................................................3
4.2.1 General Requirements ....................................................................3
4.2.2 Outdoor Mounting .......................................................................4
4.3 DIN-rail mounting option. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4.3.1 Mounting Procedure. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4.4 Removal from DIN-rail ....................................................................4
4.5 Mounting and Removal of the Power Modules................................................5
5 ELECTRICAL CONNECTIONS .........................................................5
5.1 DC Power Requirements ..................................................................6
5.2 Power A and Power B.....................................................................7
5.2.1 Redundancy ............................................................................7
5.2.2 Terminator ..............................................................................7
5.3 Alarm Connection........................................................................7
5.4 FInal Segment Connections ...............................................................8
5.5 Field Segment Connections ...............................................................9
5.6 Cable Screen / Ground Connections ........................................................9
5.7 Chassis Ground Connection ..............................................................10
5.8 Diagnostic Segment Connectors ..........................................................10
6 TESTING .........................................................................10
6.1 F801 Status and Alarm LEDs ..............................................................10
7 ROUTINE MAINTENANCE ...........................................................10
8 FM CONTROL DRAWINGS ..........................................................11
9 ATEX & UKCA SAFETY INFORMATION ................................................13
9.1 General ...............................................................................13
9.2 Installation ............................................................................13
9.3 Inspection and maintenance .............................................................14
9.4 Repair ................................................................................14
9.5 Marking ...............................................................................14

1
INM F892 Rev 1
MTL F892 - 8 Segment Redundant Fieldbus Power Supply for use with the
non-proprietary cabled systems
Figure 1 - F892-PS
1 OVERVIEW
The F892 redundant fieldbus power supply is designed to provide redundant power
for eight (8) Foundation fieldbusTM H1 segments. Pluggable connectors are provided
on the F892-CA module carrier for connection to the eight segments. Fixed screw
terminals are used for the 8 Host segment connections. Power for the eight fieldbus
segments is provided by two F801 or F802 Power Modules mounted to the carrier
and operating in a redundant configuration. Failure alarms, galvanic isolation, power
conditioning and segment termination are incorporated into each Power Module. A
single F801 or F802 module may be used where redundancy is not required.
2 DESCRIPTION
For maximum reliability, the module carrier contains no components and only provides
interconnections between the power modules and the external connections. The
carrier circuit board is supported in a rigid metal frame that protects it from mechanical
damage. Secure DIN-rail mounting is provided by integrated retaining screws. The
Power Module provides galvanic isolation between the 24V DC input power and the
fieldbus segments, as required by the IEC61158-2 fieldbus standard and the Fieldbus
FoundationTM FF-831 validation test for fieldbus power supplies. There is also galvanic
isolation between the fieldbus segments, thereby preventing cross-talk between
segments in the event of ground faults in the field wiring. Each segment has its own

2
INM F892 Rev 1
current limitation and passive fieldbus power conditioner. Termination of the fieldbus
segment is automatically maintained when single or redundant Power Modules are
fitted. The F892-CA carrier is equipped with connectors that will accept an F809F
diagnostic module. The module continuously monitors the performance of each of the
eight fieldbus segments, providing information on the network health.
Each Power Module has indicator LEDs to show both its status and that of the eight
segments under power. In normal operation, each green ‘Segment’ LED is lit, showing
that the segment is powered. If a segment is shorted, or its voltage is below the rated
output, its LED is extinguished, and the red ‘Alarm’ LED is lit. Redundant 24V DC (nom.)
input power is connected to the F892-CA carrier using two-part pluggable connectors.
Field wiring connections are available with either pluggable screw terminals (F892-PS)
or pluggable spring clamp terminals (F892-PC).
The figure below shows two sets of 8 connectors for connection to the Host. Early
versions of the F892 only included one set of connectors (unit date code 0711 and
earlier) and thus did not support redundant Host connection.
3 COMPONENTS AND ACCESSORIES
F801 8 Segment Power Module: 21.5V, 350mA
F802 8 Segment Power Module: 28V, 500mA
F809F 8 Segment Fieldbus Diagnostic Module
F892-CA-P* Carrier
F892-P* F892-CA-P* and two F801 modules
F892-2-P* F892-CA-P* and two F802 modules
F892-P*-NR F892-CA-P* and one F801 module
F892-2-P*-NR F892-CA-P* and one F802 module
F800-BLK Blanking Module included with –NR systems
* = S – Pluggable Screw Terminal Connectors
C – Pluggable Spring Clamp Connectors

3
INM F892 Rev 1
20 21 2217 18 1914 15 1611 12 13 23 24 25 26 27 28 29 30 31 32 33 34
Seg 1A Seg 2A Seg 3A Seg 4A Seg 5A Seg 6A Seg 7A Seg 8APower A
1 2 3 4
Power B
Power Module A Power Module B
F892-CA
Diagnostic Module
Inspect
Clamp
DIN
Clamps
Inspect
Clamps
70 71 7267 68 6964 65 6661 62 63 73 74 75 76 77 78 79 80 81 82 83 84
Segment 1 Segment 2 Segment 3 Segment 4 Segment 5 Segment 6 Segment 7 Segment 8
DIN
Clamps
Inspect
Clamp
www.mtl-fieldbus.com
Relcom
Alm G SG
91 92 93 8
Shield Ground
Option
Shields
Rev: F.0
+
S
- +
S
-+
S
-+
S
- +
S
- +
S
- +
S
-+
S
-
-+
-+
44 45 4641 42 4338 39 4035 36 37 47 48 49 50 51 52 53 54 55 56 57 58
Seg 1B Seg 2B Seg 3B Seg 4B Seg 5B Seg 6B Seg 7B Seg 8B
+
S
-+
S
-+
S
-
+
S
-
+
S
-
+
S
-+
S
-+
S
-+
S
-+
S
-
+
S
-
+
S
-
+
S
-
+
S
-+
S
-+
S
-
-
S
+
97 98 99
Diag Seg
94 95 96
Diag Seg
-
S
+
G
A2
A1 SG
Figure 2 - F892-CA Carrier
Carriers with date codes 0711 or earlier are only provided with a single row of eight
connectors (top). The Diagnostic Segment Connectors were introduced on carriers
with date codes after 0726. The Shield Ground Option was added with revision F.0
(previous version did not carry a revision). See sections 5.4, 5.6, and 5.8 for further
details.
4 MECHANICAL
4.1 Mounting Orientation
The F892-CA carriers are designed for mounting on a horizontally aligned DIN-rail on a
vertical surface. This method of mounting ensures optimum heat dissipation from the
F801 Power Modules.
4.2 Enclosure Requirements
4.2.1 General Requirements
The assembly may be mounted in hazardous (classified) areas – see Sections 8 & 9.
The following conditions must also be satisfied to ensure safe and reliable operation.
a) Prevent any form of pollution that could compromise the operation of the unit.
For example, choose an unpolluted location or a suitable enclosure to protect the
assembly.
b) Provide an adequate level of mechanical protection. This can be achieved by
selecting a protected location, a suitable enclosure, or a combination of both.

4
INM F892 Rev 1
c) Ensure that all cable entries and connections are secure by making provision for
the careful routing and securing of all cables.
d) Provide adequate security against unauthorized interference.
e) Ensure that the permitted ambient temperature range of –40°C to +65°C (derate to
+50°C for the F802 when loaded above 60% of its full load rating) is not exceeded.
Allow for power dissipation within the enclosure and consider the use of shading
against direct sunlight.
4.2.2 Outdoor Mounting
If the power system is mounted in an outdoor location, use a suitable enclosure with
a minimum of IP54 ingress protection. A higher level of ingress protection rating will
be necessary if the working atmosphere is or can be corrosive or if the enclosure is
subject to wet or dusty environments.
4.3 DIN-rail Mounting
The carrier is designed for mounting on 35mm x 7.5mm T-section “top hat” DIN rail to
EN50022 and uses six built-in DIN clamp tabs to hold it on the rail. The F801 power
modules must be removed from the carrier to obtain access to the DIN-rail clamp
screws.
4.3.1 Mounting Procedure
Before starting to mount the carrier on the DIN rail, rotate all six of the DIN clamp
screws counterclockwise (i.e. unscrew) until the clamping tabs reach the position
shown in Figure 3a and none of the tabs extend into the channel for the DIN rail.
a)
b)
Figure 3 - DIN rail clamp positions before mounting
Press the carrier onto the DIN-rail and rotate each of the DIN clamp screws clockwise
until the tab tightens against the DIN-rail. The clamping tabs can be seen through the
Inspect clamps holes when they are in the correct position.
4.4 Removal from DIN-rail
The Power Modules must be removed from the carrier to obtain access to the DIN-
rail clamp screws. Support the carrier by pressing it to the DIN-rail and unscrew
(counterclockwise) the six DIN-rail clamp screws. Turn each screw approximately two
full turns when releasing its clamping tab from the rail. Remove carrier.

5
INM F892 Rev 1
4.5 Mounting and Removal of the Power Modules
The Power Modules are secured to the carrier with four screw mountings. There are
four locating connectors (two for each module) on the module carrier along with mating
connectors in the F801 or F802 module. Align the module with the retaining screws
and press onto the connector. Hold it in place while tightening the four retaining
screws. To remove a Power Module, support the module while unscrewing the four
retaining screws at its base. Lift the module off the carrier connector.
Note: Earlier versions of the module carriers do not have locating connectors. Align
using the retaining screws furthest from the module connector and rock onto the
connector.
5 ELECTRICAL CONNECTIONS
Figure 4- Electrical Block Diagram of F892-CA
Megablock
wiring hub
F801 or F802
Power Module A
F801 or F802
Power Module B
Power B
Power A
To fieldbus devices
To fieldbus
segments
2 - 8
1
2
3
4
5
6
7
8
To Host Ports 1 - 8
1
2
3
4
5
6
7
8
Redundant Host Ports 1 - 8

6
INM F892 Rev 1
The DC power, Alarm and Field Segment connectors are pluggable and available in a
screw terminal version (-xS) or a spring clamp version (-xC). See Figures 5a & 5b. The
terminals can accept the following conductor sizes:
Type Conductor size
Screw terminals (-PS) 0.14 to 2.5mm2
Spring clamp terminals (-PC) 0.2 to 2.5mm2
Figure 5a - ScrewTerminal Figure 5b- Spring Terminal
NOTE: When wiring to spring-clamp terminals, use a screwdriver with a 3-4 mm blade
and depress the spring-clamp button before inserting the termination cable. See
Figure 5b.
5.1 DC Power Requirements
Dual redundant power terminals requiring a nominal input voltage of 24VDC are
provided allowing the use of bulk power supplies with a supply range of 19.2–30VDC.
Input power cabling and over-current protection devices must be chosen to match the
current consumption.
An F892 system, operating with redundant F801 modules at 24VDC, will require 3.5A
in total if all eight segments draw the maximum of 350mA. With redundant F802
modules the system will draw 6A when all segments are loaded to 500mA. Note that
the total current could be drawn from either the Power A or Power B connection if one
power module is removed.
It is also important to size the Bulk Power Supply to handle the inrush current required
by the F801 or F802. Inrush is less than 2 times the maximum rated current for the
F801 with a duration lasting less than 1ms. For the F802, the inrush is less than 4
times the maximum rated current with a duration less than 10ms.

7
INM F892 Rev 1
5.2 Power A and Power B
Power A supplies Power Module A and Power B supplies Power Module B. Each module
provides DC power to all eight segments - see Figure 4. DC supply connections are
as follows:
Power A Power B
Pin No. Connection Pin No. Connection
2 +ve 4+ve
1 -ve 3-ve
Cable lengths on the Power connectors should not exceed 30m nor be routed outside
the building.
5.2.1 Redundancy
For redundant operation, F801 or F802 modules must be fitted in Power Module A
and Power Module B locations. For non-redundant operation fit an F801 or F802 in
the Power Module A location and apply power to Power A terminals. The F800-BLK
would then be placed on the Power Module B connector to allow the alarm circuit to
function. Power must be connected to Power B terminals if live replacement of Power
Module A is necessary since Power B terminals feed the Power Module B connector.
5.2.2 Terminator
A single terminator is provided automatically on each segment whether one or two
Power Modules are used.
5.3 Alarm Connection
In an alarm condition a normally closed, galvanically-isolated relay contact in each F801
or F802 goes to an open-circuit condition. These relays are connected in series on the
F892-CA carrier and are presented at terminals as follows:
Alarm
Pin No. Connection
91 +ve
92 -ve
In non-redundant applications using a single Power Module, the alarm connections
on the carrier will be open-circuit, indicating a permanent alarm condition unless the
F800-BLK module is fitted in place of the missing Power Module.