Extra Popit Modules; Additional Troubleshooting Tips - Bosch D8125 Operation And Installation Manual

6. Meter the positive (+) and negative (-) data terminal wires (disconnected from the POPEX) to verify that they
are not shorted or grounded.
7. Check the wire gauge (refer to Table 6). Proper wire gauge is determined by the length of the wire run and the
number of POPITS installed on the POPEX. Compare the system wiring runs to the recommended wiring
chart in Figure 11. To determine the maximum resistance between each POPIT and its corresponding POPEX:
1. Disconnect the Zone Expansion Loop from the POPEX.
2. Prior to installing the POPITs, twist the two Zone Expansion Loops together and measure the
resistance with a volt-ohm meter. Maximum resistance should not be greater than 90 Ω.
3. After installing the POPITs, meter the backbone wires. The resistance on the backbone should be
equal to 920 kΩ divided by the number of POPITs on the wire (±20%). Each POPIT = 920 kΩ
resistance (±20%).
8. If all points in the ZONEX system are missing, verify that the points of protection labeled DO NOT ENABLE in
Table 7 and Table 8 are not assigned to a POPIT.
9. If further difficulties are encountered, replace the appropriate POPEX or POPIT Module.
10. Check the tamper switch on the D8126T/D8127T to make sure it is operating properly. D8126T/D8127T POPIT
modules should be installed at least 3.0 in. (76 mm) away from each other. This prevents the magnets from
interfering with each other.
11. If shielded cable was installed, check that there is not more than one ground on the shield. Shielded cable
should be grounded only to Terminal 4 at the D8112. Verify by removing the drain wire from Terminal 4 and
metering between Terminal 4 and the drain wire. If continuity is found, search for the foreign ground on the
drain wire.
4.2.4

Extra POPIT Modules

If the D1252A Command Center displays an "extra POPIT" status code (e.g., ZN101X) during a [Command 44]:
1. Check the programming of horizontal or vertical mode in the D8112 handler program item 2.2 Hrzntl [Yes/
No]
2. Verify that the appropriate vertical or horizontal switch setting chart was used (see Table 7 and Table 8, pages
27 and 28, respectively), and that the POPIT switch settings are correct.
3. Verify that each POPIT connected to the same POPEX Module has a unique switch setting (refer to Section
3.3.3 POPIT Module Installation).
4. Verify the assignments of POPIT Modules to master zones in the D8112 handler program items 2.5 Z1Points
through 2.12 Z8Points.
4.2.5

Additional Troubleshooting Tips

If you have determined that there are no missing or extra POPIT Modules and the problem has still not been solved, one of
the following troubleshooting tips may provide you with additional help.
1. Before loading or copying a file into the control panel, always disconnect the wiring from D8112G1/G2 Serial
Data In and Serial Data Out terminals (30 and 31).
2. ZONEX systems can be influenced by very strong RF sources, such as radio stations and HAM radio
operations with transmitting antennas located within one mile of the system. Use shielded twisted pair wire for
best protection against RF-induced noise.
3. If the system intermittently displays a trouble condition, and transmits Trouble Zone D and Restoral Zone D
reports with master zone number to the central station, meter the Zone Expansion Loop wired to the POPITs
for high level AC inductance or spikes. Inspect the wiring for intermittent grounds and shorts, and determine if
there is a strong AC source located nearby. AC induction on the data line must be less than 0.1 VAC.
4. If the D1252A displays non-programmed information when a master zone is faulted, copy the D8112:PTEXT
file for the non-expanded zone displaying the information, delete the information, and reload the file.
© 2004 Bosch Security Systems, Inc.
D8125 Operation and Installation Guide
Page 43
D8125
Troubleshooting
74-04247-000-N