Installation __________________________________________________________________________
RF-MCGARDPRO
Hubbell Power Systems, Inc.
–
RFL™
Products
July 1, 2022
©2022 Hubbell Incorporated
3-17
Under normal operating conditions when the alarm conditions are healthy the relays are
energized, in an alarm or alert state the relays will be in the de-energized position.
Note
All relay contacts are labeled in the de-energized position.
C
NC
NO
C
NC
NO
POWER SUPPLY 1
POWER SUPPLY 2
MAJOR
MINOR
SW1
SW2
I
0
I
0
+
+
-
-
Relay
Contacts
Input
Power
Figure 3-13. Relay Connections/Power Supply I/O
WARNING!
Improper ground connections may result in system malfunctions, equipment damage, or
electric shock.
The HPS/RFL GARD Pro system must be properly grounded as described in the following
section before attempting to connect input power.
3.6.3 Chassis Ground Connections
A protective earth stud at the lower right rear of the HPS/RFL GARD Pro system chassis is the
main ground for the terminal.
MAJOR
MINOR
Protective Earth
Stud
Figure 3-14. Chassis Grounding Location