Bosch D8125 - D8112 G1;G2 POPIT Module Installation

D8125 Operation and Installation Guide
D8125
Page 26 © 2004 Bosch Security Systems, Inc.74-04247-000-N
3.3.3 POPIT Module Installation
3.3.3.1 Wiring POPITs to the Expansion Loop
The zone expansion loop is a two-conductor wire interconnecting all POPIT Modules assigned to a single POPEX (see Figure
11). Up to three zone expansion loops can be connected to one D8125 when using shielded or unshielded cable.
The required wire gauge for the zone expansion loop(s) (up to three max.) can be determined using Table 6. When using
unshielded cable each zone expansion loop can be up to the distance shown in Table 6. For shielded cable the combined total
length of all zone expansion loops cannot be more than shown in Table 5.
If it is suspected that AC induction may be a problem, use shielded cable and make sure the POPEX module is grounded to
Terminal 4 on the D8112G1/G2. The shield drain wire should only be attached to ground at Terminal 4 (there should only be
one ground on the shield). Any splices along the zone expansion loop must have the drain wires soldered together and
isolated from ground.
Hint: AC induction or RF interference may occur when a ZONEX system is installed in or near the following:
• Radio station transmitter site or other broadcast station
• Ham radio transmitter site
• Computer network system
• Heavy machinery and motors
• PBX telephone system
• Welding shop
• High voltage electrical equipment or transformers
• Public service (police, fire department, etc.) using radio communications
• When wires must be run close to electrical lines, fluorescent fixtures or telephone cabling
POPIT Modules do not need to be wired in any particular order on the zone expansion loop. A switch setting on each POPIT
(see POPIT Module Assignments) identifies the point of protection, regardless of its physical location. D8126T/D8127T
POPIT modules must be mounted at least three inches apart. This will prevent the tamper magnets from interfering with
each other.
The POPIT modules should be connected to one another in parallel (see Figure 10).
Remember: Up to 63 POPIT modules can be connected to one POPEX module.
1. Connect the positive (+) Data terminal from one POPIT to the positive (+) Data terminal on the next POPIT.
2. Follow step 1 above to connect all POPITs on the same zone expansion loop.
3. Connect the negative (-) Data terminal from one POPIT to the negative (-) Data terminal on the next POPIT.
4. Follow step 3 above to connect all POPITs on the same zone expansion loop.
Maximum Length of Each Zone Expansion Loop
AWG (mm) 25 POPITs
Ft. (m)
40 POPITs
Ft. (m)
63 POPITs
Ft. (m)
26 (0.02) 900 (274) 600 (183) 400 (122)
24 (0.5) 1,700 (518) 1,000 (305) 600 (183)
22 (0.8) 2,500 (762) 1,500 (457) 900 (274)
20 (1.0) 3,800 (1,158) 2,400 (732) 1,500 (457)
18 (1.2) 6,400 (1,951) 4,000 (1,219) 2,500 (762)
16 (1.5) 9,600 (2,926) 6,200 (1,890) 4,000 (1,219)
14 (1.8) 16,700 (5,090) 10,000 (3,048) 6,000 (1,829)
Table 6: Zone Expansion Loop Wiring Specifications
Installation