Installation __________________________________________________________________________
RF-MCGARDPRO
Hubbell Power Systems, Inc.
–
RFL™
Products
July 1, 2022
©2022 Hubbell Incorporated
3-5
3.5
System Module I/O Connections
The HPS/RFL GARD Pro system has a system I/O module used for timing and remote access
functions.
Make connections as required as shown below.
IRIG-B timing
connection
1
– Pulse per
second timing
connection
GPS antenna
connection
(optional)
Ethernet connection
for remote access
RS-232 connections
(Management port)
RS-485 connection for
DNP3
Right LED indication
Display and transmit status:
Blinking indicates link and Ethernet frames being transmitted
Left LED indication
Display link and display status:
Solid indicates link
Blinking indicates link and Ethernet frames being received
Figure 3-2. System Module I/O Connections
