Installation Guide
TruFit
®
Power Distribution Unit
│
94-1100-00002873 A0 EN 29/34
4.10
User Interface Board
The User-Interface Board (UIB) provides an interface for connecting the PDU to external monitoring and control
equipment. The main features of this board include the following items. (Also see Figure 4.4.1 below.)
1.
Alarm relay contacts (Form C)
Alarm designation
Terminals (J12)
Contact type
Summary alarm
1 – 3
NO/CFA
2 – 3
NO/OFA
Unacknowledged events
4 – 6
NO/CFA
5 – 6
NO/OFA
Default settings
NO = Normally Open (when relay coil is de-energized)
NC = Normally Closed (when relay coil is de-energized)
CFA = Closed for Alarm
OFA = Open for Alarm
2.
Remote Emergency Power Off (REPO) user input
Closing the circuit between J8-11 and J8-12 forces a shunt-trip on the input breaker. (For use with
isolated dry contacts.)
3.
Ethernet connection
J7 (RJ-45 connecter) is for an Ethernet connection to the PDU. For cybersecurity compliance and list of
open ports, refer to TruFit User’s Manual.
4.
RS-485 (Modbus-RTU) connection
The 5-point terminal block, J3, is for an RS-485 (Modbus-RTU) connection. It can be connected to a
building monitoring system.
Refer to
Modbus
section in
PowerView manual 94-1100-00002861
for more details.
All field wiring connections are made via pluggable screw terminals, rated for
solid or stranded wiring sized #12
to #22AWG
.
