Specifications

December 2008 Page 17–13
Chapter 17. Pilot Wire Interface (HCB/SPD) Module
17
13. Pull the local Power Supply Module.
After pulling the Power Supply Module,
measure the resistance across terminal block
pins 7 and 8 (HCBP and HCBN). The resis-
tance should be 300Ω. The LEDs should look
like this:
14. Reinsert the Power Supply Module.
Reinsert the Power Supply Module into the
local chassis and wait for the system to reset.
15. Set the DTT Input/Output to the
“Enabled” setting.
16. Set the DTT Output Trip Hold Time to the
“0ms. (none)” setting.
17. Set the LOPC Mode to the “BLK-Short
pilot wire” setting.
18. Set the LOCC Mode to the “BLK-Short
pilot wire” setting.
19. Set the DTCC Mode to the “BLK-Received
DTT will short wire” setting.
20. Download the settings to FOCUS.
21. Pull the local Power Supply Module.
After pulling the Power Supply Module,
measure the resistance across terminal block
pins 7 and 8 (HCBP and HCBN). The resis-
tance should be 0Ω. The LEDs should look
like this:
Figure 17–16. Local Terminal
Wiring Connections.
22. Reinsert the Power Supply Module.
Reinsert the Power Supply Module into the
local chassis and wait for the system to reset.
23. Key the remote terminal.
Flip the control switch to apply the 35 to
250Vdc to the remote terminal. The resistance
should be 0Ω across the local pilot wire. The
LEDs should look like this:
12345678
KEY IN
TRIP OUT
ALARM
HCBP
HCBN
P2
330W
OHM
METER
Complete Steps 15–20 for each HCB module in
each chassis. For two-terminal applications,
configure the HCB module in the local chassis and
then the HCB module in the remote chassis. For
three-terminal applications, configure the left and then
the right HCB module in the local chassis and then
repeat for the left and right HCB modules in each
of the remote chassis.
When you have completed the configuration, the
settings on all the modules you are testing will be
as follows:
DTT Input Output: Enabled
DTT Output Trip Hold Time: 0ms (none)
LOPC Mode: BLK-Short pilot wire
LOCC Mode: BLK-Short pilot wire
DTTCC Mode: BLK-Received DTT will
short wire
NOTE