Rockwell Automation 1407-CGCM Combination Generator Control Module - Manual (Page 15)

Rockwell Automation Publication 1407-UM001G-EN-P - April 2013 15
Installation Chapter 2
Electrical Connections The CGCM unit’s connections are dependent on the application and excitation
scheme. All inputs or outputs cannot be used in a given installation. Incorrect
wiring can result in damage to the unit.
Connect the CGCM unit’s terminals with copper wire rated for a minimum of
600V. General appliance wire rated for minimum temperatures of 105
°
C (221
°
F) is acceptable. All wire must be copper. Select circuit conductors based on good
design practice.
The wire gauge range listed in the Terminal Block Label Description table
indicates the physical capabilities of the connector.
The CGCM unit’s terminals are on the front, bottom, and right panel of the unit.
The nine-pin connector on the bottom of the unit is used for communication
between CGCM units in a redundant system. Suggested torque for terminal
screws is 1 N•m (9 lb•in).
Refer to pages 17 … 34 for typical connection diagrams.
Terminals to be used as landing points for shielded wires are provided on several
terminal strips. Shield terminals with the same name are internally connected
together but are not connected to protective earth or any internal unit circuitry.
Table 1 - Terminal Block Label Description
Terminal Block Wire Gauge
Range Label Description
TB1
2.6…2.1 mm 2
(10…12 AWG)
PMG A Phase A excitation power supply
PMG B Phase B excitation power supply (three phase only)
PMG C Phase C excitation power supply
SHLD1 Shield 1 landing points are tied together but are not connected internally to protective earth or
other unit circuitry
SHLD1
TB2 SHLD2 Shield 2 landing points are tied together but are not connected internally to protective earth or
other unit circuitry
SHLD2
EXC(-)
Excitation output negative
EXC(+) Excitation output positive