CHAPTER 5– CONNECTING FIELD DEVICES TO THE I/O BOARD
34 MultiLoad II/ RCU II Explosion Proof Lite (EXL) Installation Guide - Part # 6070
Chapter 5 Connecting Field Devices to the I/O Board
Two I/O board options are offered for use with the MultiLoad II. They are the Digital/ Analog I/O
Board and the 2 Meter I/O Board. They primarily differ in the number of I/O points, although the
latter can control two meters as its name implies. The RCU II only supports the Digital/ Analog I/O
Board. Figures 5.1 and 5.2 show the board’s terminal arrangements.
The 2 Meter I/O board treats its I/O in two groups corresponding to two different meters. In
the 2 Meter I/O wiring diagrams that follow, FCM 0 ports correspond to the first meter and
FCM 1ports correspond to the second meter. For more information, please consult the
MultiLoad II Users Guide.
Locating the Internal I/O Board
The I/O board is mounted above the Power Supply/Comm board. The I/O board is connected to
the Power Supply/Comm board at J4 & J5. Corresponding connections are on the bottom side of
the I/O board.
Caution: Disconnect from the supply circuit before opening the enclosure. Keep
this tightly closed when circuits are live.
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