BRX Power Injector Installation Guide
24
180-0192-001-R01
4.2 Troubleshooting Steps for the BRX Power Injector
You can follow the following steps to troubleshoot problems with the BRX Power Injector.
SYMPTOM #1: The BRX Power Injector does not have power
. This is indicated by the LED
(Visual Indicator D25) being off.
Case #1: Local -48Vdc Power
improperly wired
The BRX Power Injector supports a
redundant -48Vdc power input. Make
sure that the black (live) -48Vdc wire
connects to the
-48VA
and that the
red (return) wire connects to the
-
48VRTNA
for the first DC Power
Cable. For the optional second DC
Power cable, make sure that the black
(live) -48Vdc wire connects to the
-
48VB
and that the red (return) wire
connects to the
-48VRTNB
.
NOTE:
There
is
a
protection
mechanism in place to prevent any
damage to the circuitry of the BRX
Power Injector if you inadvertently
invert the wires.
Case #2: Local -48Vdc Power
Protection Fuse blown:
The first DC
Power Input (
-48VA
) is protected by
fuse
48VA
(F1) while the second DC
Power Input (
-48VB
) is protected by
Fuse
48VB
(F2).
You should inspect each fuse for
damage. Replace with Cartridge
Fuse 5 mm x 20 mm 1A/250V Fast
Acting (Litefuse 0217001.MXP or
similar)
