Troubleshooting ______________________________________________________________________
RF-MCGARDPRO
Hubbell Power Systems, Inc.
–
RFL™
Products
July 1, 2022
©2022 Hubbell Incorporated
8-6
8.4.2 The PLC Digital Board Components
The HPS/RFL GARD Pro system PLC digital PLC board has extensive jumper and switch
settings along with 26 test points. This includes the LEDs and test points on the front of the
board,
which are the only test points and LEDs accessible when the front cover is opened.
CAUTION
The following information is to be used by qualified personnel only, normally an HPS/RFL
Service Engineer.
The illustration below shows the location of all switches, jumpers, LEDs and test points on the
board followed by a description of their use.
TP17
J3
TP22
TP23
TP20
TP21
TP19
TP10
J8
J 10
J 16
J7
J 13
J 12
J9
SW1
J 11
TP12
TP9
TP16
TP13
TP1
TP2
TP11
J4
J5
J14
J15
TP14
TP8
TP15
TP7
TP6
TP4
TP18
TP25
TP26
TP27
TP3 TP24
DS2
DS4
DS6
DS8
DS1 DS3 DS5 DS7
Top View
Front View
Figure 8-4. PLC Digital Board