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MLP-A/AR/AD-ST1400-25 5
Board Assembly
There are three different fixed boards, two optional relay boards and an optional Modbus board which make up the PCB Assembly. Depending upon requirements,
either a Electromechanical or Solid State Relay Board module can be used. Boards are field replaceable. Simply loosen the three locking standoffs, remove one
board, insert the other board and tighten screws.
Note: Boards are susceptible to ESD. Refer to Appendix A, "Electrostatic Sensitive Device (ESD)", on page 20.
Figure 4: Millennium Module Boards
Terminal
Sensor
Option Board
Board
Board
Solid State Relay Board
Fault
+
-
Low
+
-
High
+
-
Electromechancial Relay Board
FNO
FAULT
normally open
FCOM common
FNC normally closed
LNO
L
OW
normally open
LCOM common
LNC normally closed
HNO
HIGH
normally open
HCOM common
HNC normally closed
Modbus Terminals
A
B
COM
Shld