Bosch D9412GV2 Troubleshooting Manual page 31

.
A
Refer to Figure 19 on page 36.
Are the POPEX data wires connected correctly to the
control panel ZONEX IN and OUT terminals?
Fix the incorrect wiring.
Set the digital voltmeter (DVM) to VDC. Put the red lead on
the POPEX's AUX terminal. Put the black lead on the
POPEX's GND terminal.
If the point expansion technology is powered from an
auxiliary power supply, ensure that the auxiliary power
supply shares a NEGATIVE (-) common reference with
the control panel. Refer to
Does the DVM read 12 VDC to 13 VDC?
Refer to TTP51 Device or
Power on page 111 .
Disconnect all POPIT data loop wiring from the POPEX.
Connect one known good POPIT to the POPEX. View point
status for the point again.
Is the point still missing?
F G
Figure 18: Point Expansion Technology Powered from Auxiliary Power Supply Wiring Diagram
Bosch Security Systems, Inc. | 11/05 | F01U011024B
D9412GV2/D7412GV2 | Troubleshooting Guide | 3.0 Troubleshooting
Figure 18 on page 31.
Module Does Not Have
Control Panel
28
27
26
25
24
23
F G
At the location on the POPIT data bus where the
missing point was removed, short the bus conductors
together. Set your DVM to read resistance. Put the
red lead on one POPIT data bus conductor, and the
black lead on the other.
•
If the DVM shows a short, refer to
on Wire on page 102.
•
If the DVM shows an open, refer to
Wiring on page 100.
• If the DVM shows >60 Ω but not an open, there
is excessive wire length or too many devices on
the circuit for the wire gauge used. Perform
voltage drop calculations to determine an
acceptable combination of wire gauge and
length for the current draw of the devices
installed on the circuit.
Replace the POPEX with a known good POPEX. View point
status again.
Is the point still missing?
The POPEX was bad. Reconnect POPIT data loop.
Replace the control panel.
Point Expansion
Technology
GND
OUT
IN
AUX
- +
12 V Auxiliary
Power Supply
TTP48 Noise
TTP47 Open
31