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Morrison Bros. Co. ‑ Dubuque, IA ‑ 800‑553‑4840
1218CT0112 PP rev 04‑14‑2022
Communication Module
Mounting
1. Mount the enclosure to a stable vertical surface in a non-hazardous location using the mounting flanges of the
enclosure. Do not make additional holes in the enclosure.
2. Morrison has provided two openings on the sides of the NEMA 4X enclosure for connection and wiring. To
ensure the enclosure maintains its NEMA 4X rating, only use Thomas & Betts Cat. No. H050GR-TB or H050-TB
or equivalent ½” hubs in these openings. Failure to follow these instructions voids any assurance that the enclosure
is NEMA 4X.
Wiring
Preparation
1. Open the front cover of the Communication Module by first loosening the captive screws at each corner, then
fully unscrewing them. This allows the front cover to be carefully removed.
NOTE:
The corner screws that hold the front cover in place are captive screws and are not intended to be removed from
the front cover.
Wiring Steps
Figure 8: 1218C Console Interface Board, J4 connector
Figure 9: J4 connector wiring
1. Locate the J4 connector on the 1218C Console interface board and remove the pluggable connector, shown in
Figure 8.
2. Locate the green and blue twisted pairs from the previously stripped ethernet cable and strip each pair
approximately 5mm (1/4 inch).
3. Wire the green twisted pair to pins 1 and 2 of the J4 connector on the 1218C, the green wire connected to pin 1
and the white/green wire connected to pin 2, shown in Figure 9.
4. Wire the blue twisted pair to pins 3 and 4 of the J4 connector on the 1218C, the blue wire connected to pin 3 and
the white/blue wire connected to pin 4.
5. After completing the wiring, ensure the J4 connector is connected to the 1218C in the correct orientation.
