MSA Chillgard RT - Communication Cable Connections

B-7
I
dentify the main power voltage that will power the Chillgard RT Relay
Module; if unsure of your primary power, consult an electrician or local
power utility.
WARNING
Application of improper power to the Chillgard RT Relay
Module will result in damage to the unit.
Refer to FIGURES B-3, B-4 and B-5 to identify the location of the main
power connections within the Chillgard RT Relay Module.
1. Locate the power wiring entry on the lower left hand side of the unit
and remove the hole plug.
2. Route the power wiring through the hole using proper
hardware/conduit (not supplied).
3. Strip the power wiring conductors.
4. Insert each stripped conductor into its proper location in the power
cable connector (FIGURE B-4).
5. Tighten each screw within the connector to secure each wire.
6. Pull on each wire to ensure that it will remain in place. If a wire
comes out of the connector, loosen the screw, reinsert the wire,
and re-tighten the screw.
7. The Relay Module must have the same electrical ground as the
M
onitor unit.
Communication Cable Connections
Use the factory-recommended RS485 communication cable. Low
capacitance wire for RS485 communications, such as Beldon #9841, is
recommended.
CAUTION
Maximum length of the communication cable is 1000 feet
(305 m); otherwise, the Chillgard RT Relay Module will not
operate properly.
WARNING
Use only the recommended cable. Using inferior or wrong
communication cable causes improper operation of the
Chillgard RT Relay Module.
Do not exceed the maximum length of communication cable
listed; otherwise, the Chillgard RT Relay Module may not
operate properly and may not indicate a trouble condition.