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8.1 Description
The PLC Test Board is designed to be conve-
niently placed into an empty slot in the 1-RU PLC
Hybrid chassis, saving panel space and giving
front and rear test access to carrier signals leaving
and entering the panel.
Its primary purpose is two-fold by providing
testing functionality and replacing the carrier
grounding knife switch that may be used in the
panel.
The unit is electrically inserted between the
panel's final coax input/output going to the line
tuner in the substation yard, as shown in the
diagram. If there are hybrids, then it is placed at
the end of the hybrid chain before going to the
line tuner. It can be located inside the same
chassis with the 1-RU PLC Hybrids if there is an
empty slot. This does require a one-slot PLC Test
Board front label overlay to be put on the slot it
uses in the chassis.
For 1-RU PLC Hybrid chassis units that shipped
before March 2023, please request the correct
Control House
UPLC-II
Chapter 8 PLC Test Board
J1
J1
IN1
Figure 8–1. PLC Test Board Location
Copyright © AMETEK Power Instruments
replacement chassis depending on the number of
PLC Test Boards needed and whether the unit is a
flush mount or projection mount type in order to
retrofit an older chassis. This is because the front
panel must be changed on the chassis to fit the
larger hole required for the safety test switch on
older units.
The intended application is to use one PLC Test
Board per coax going out into the yard. See the
table for typical cases.
Table 8–1. PLC Test Board Applications.
Application
Single Coax Line Tuner
2-Frequency Line Tuner
Phase to Phase Coupling
3-Phase Coupling
PLC
J3
Test
Line
Board
Quantity of
PLC Test Boards
1
2
2
3
Line
Tuner
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