D8125MUX | Operation and Installation Guide | 5.0 Troubleshooting
EN | 23
Bosch Security Systems, Inc. | 9/08 | F01U034973-02 23
Table 17:
Troubleshooting (continued)
Symptom Diagnosis Remedy
Short on Aux power, Terminal
3 or Zonex power, Terminal 24.
Terminals 3 and 24 share a common circuit breaker. All off-board points report as
MISSING.
If only one D8125MUX is
connected to the control panel,
the D8125MUX might be
incorrectly connected to the
control panel, or MUX bus
wiring might be disconnected
from the D8125MUX.
Check wiring and devices connected to these terminals
for shorts or grounds. Check connections to D8125MUX
and control panel for errors. Check the green Operation
LED on the D8125MUX to see if it is flashing.
Multiplex power terminals or
MUX bus terminals on DS7432
might be incorrectly wired.
Verify the wiring on DS7432 is correct. Points on the DS7432 all
appear missing.
Address switches on DS7432
set for Points 121 through 128.
Ensure address switches on DS7432 are not set for
Points 121 through 128. These points are reserved for
control panel functions.
6.0 Specifications
Table 18: Specifications
Operating Voltage Nominal 12 VDC
Current Requirements D8125MUX only: 140 mA
Maximum Current Draw
(using both MUX bus
outputs
and both power outputs)
678 mA
Operating Temperature +32°F to +120°F (0°C to +49°C)
Relative Humidity 0 to 93%
Dimensions (H x W x D) 1.0 in. x 3.25 in. x 5.5 in. (25 mm x 8.3 cm x 14.0 cm)
