Liebert Universal Monitor - Manual (Page 34)

Wiring and Connections - Optional Expansion Board
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5.2 Connecting Inputs and Outputs
The Universal Monitor’s optional Expansion Board permits the addition of 16 input and eight output
devices. This section describes how to connect devices to the Expansion Board’s inputs and outputs.
To determine the proper wire size, see Table 9.
5.2.1 Connecting Digital Inputs
The 16 digital inputs are found on the lower portion of the Expansion Board, as shown below. These
inputs are numbered 9 through 24 (the Universal Monitor’s digital inputs are numbered 1 through 8).
To connect an input:
1. Disconnect all electrical power from the Expansion Board.
2. If necessary, remove a conduit knockout to permit wire entry into the Expansion Board enclosure.
3. Bring the wire(s) into the Expansion Board enclosure through a conduit knockout or access slot.
4. Loosen the appropriate screw and slip the stripped end of the wire into the terminal block.
5. Tighten the screw until it holds the wire snugly.
NOTE
Each terminal block is a removable assembly to permit easier connection of more than one
input at a time. If making multiple connections, grasp the upper portion of a block and pull
firmly until the assembly pulls apart.
After making the connections, push the removed piece back into the portion attached to the
printed wiring assembly until the terminal block pieces lock together.
OUT1
K1
V1 V3 V5 V7 V9 V11 V13 V15
K2 K3 K4 K5 K6 K7 K8
OUT2 OUT3 OUT4 OUT5 OUT6 OUT7 OUT8
S4 S3 S2 S1
68AO
DEFAULT SETTINGS FOR USE WITH UNIVERSAL MONITOR
EIA485 + (to UM-)
0V
EIA485 - (to UM+)
INPUT TERMINAL BLOCKS
Note numbering keys below terminal blocks;
inputs are numbered from left (9) to right (24)
Numbering keys