RFL 9785 - Ground Connection at TB1-8

Because RFL™ and Hubbell® have a policy of continuous product improvement, we reserve the right to change designs and specifications without notice.
Table 9-4. TB1 Terminal Assignments
Terminal Numbers Terminal Assignments
TB1-1 Internal Amp Fail Relay COM
TB1-2 Internal Amp Fail Relay NO
TB1-3 Internal Amp Fail Relay NC
TB1-4 External Amp Fail Relay COM
TB1-5 External Amp Fail Relay NO
TB1-6 External Amp Fail Relay NC
TB1-7 Chassis Ground
TB1-8 Earth Ground
9.2.9.2 GROUND CONNECTION AT TB1-8
At TB1-8 on the Mother Board Rear Panel a ground wire should be connected. Ideally this wire should go
directly to the sub-station ground bar. If this is not feasible, shorting the wire to TB1-7 (Chassis Ground) is an
alternate method. This will cause surge currents to pass through the Mother Board and chassis before exiting to
ground. Connecting directly to the sub-station ground bar is preferred.
RFL 9785 RFL Electronics Inc.
May 16, 2011 9-18 (973) 334-3100