Specifications

Page 17–14
FOCUS System Manual
Figure 17–17. Local Terminal
Wiring Connections.
24. Conduct pilot wire signal tests.
Connect a 330Ω, 1/2W resistor across
terminals 7 and 8 at each line terminal (local
and remote).
Connect the low impedance (50Ω) oscillator
to the local pilot wire terminals 7 and 8.
Set the frequency to 60Hz and the output to
5V.
Measure the voltage at pins 7 and 8 on the
remote terminal block. The voltage should be
4.3 to 4.6 volts.
17.5.1 Alarm check
Pull the module and the remote terminals 5 & 6
should read 0Ω.
After successfully completing these acceptance
tests, reverse the modules and repeat steps 1-24.
17.6 Drawings
The schematic for the Pilot Wire module and
Interface is available upon request.
The component locations for the HCB modules
are depicted in the following diagrams.
For two-terminal lines, perform Step 26 for the
designated local and remote chassis and
then repeat using the local chassis as the
remote chassis and vice versa.
For three-terminal lines, perform Step 26 for
the local chassis and each remote chassis.
Then repeat using the local chassis as a
remote chassis.
NOTE
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KEY IN
TRIP OUT
ALARM
HCBP
HCBN
P2
330W
OHM
METER