Wiring Popits Together; Three Inch Clearance For Tampered Popits; Wiring Data Expansion Loops To Popex Modules; Figure 6: Typical Expansion Loop/Popit Configuration - Bosch D8125 Operation And Installation Manual

D8125
Installation
3.2.3.2

Wiring POPITs together

Do NOT connect POPITs to each other in series, or with a T-tap.
Doing so may cause random missing POPIT conditions. Follow the
procedure below to connect POPITs to one another in parallel.
Figure 5 shows a typical configuration.
1. Connect the positive (+) Data terminal from one POPIT to the
positive (+) Data terminal on the next POPIT.
2. Connect the negative (-) Data terminal from one POPIT to the
negative (-) Data terminal on the next POPIT.
3. Repeat steps 1 and 2 to connect all POPITs to the expansion
loop. You don't need to wire the POPITs in any particular order
on the loop. The switch setting on each POPIT assigns it a point number, regardless of its physical location.
3.2.3.3

Three inch clearance for tampered POPITs

Mount tampered POPIT modules at least 3.0 in. (76 mm) apart to prevent the tamper magnets from interfering with each
other.
D8125
POPEX
MODULE POINTS 9 - 71
(–)
(–)
(+)
(+)
GND
OUT
IN
AUX
ZONE EXPANSION LOOP
D8125
POPEX
MODULE POINTS 73 - 135
(–)
(–)
(+)
(+)
GND
OUT
IN
AUX
ZONE EXPANSION LOOP
3.2.4

Wiring Data Expansion Loops to POPEX Modules

There are two positive (+) and two negative (-) data expansion loop terminals on each POPEX module. Follow the
procedure below to connect the data expansion loops to the D8125 POPEX Module. See Figure 5. Remember, you can only
connect a maximum of 63 POPITs (40 for a D7212B1) to one D8125,
1. Connect the positive (+) Data terminal from the first POPIT on the data expansion loop to one of the D8125
module's positive (+) terminals.
2. Connect the negative (-) Data terminal from the first POPIT on the data expansion loop to one of the D8125
module's negative (-) terminals.
74-04247-000-N
Switches 1 to 6
POPIT
DATA
DATA
(–) (+) LOOP
(–) (+) LOOP
NEGATIVE (–)
POSITIVE(+)
Switches 1 to 6
POPIT
DATA
DATA
(–) (+) LOOP (–) (+) LOOP
NEGATIVE (–)
POSITIVE(+)

Figure 6: Typical Expansion Loop/POPIT Configuration

D8125 Operation and Installation Guide
33 kΩ E.O.L.
RESISTOR
(P/N: 15-03130-002)
POPIT POPIT POPIT
DATA
(–) (+) LOOP
33 kΩ E.O.L.
RESISTOR
(P/N: 15-03130-002)
POPIT POPIT
DATA
(–) (+) LOOP
Page 22
Maximum Length of All Data
Expansion Loops Combined
AWG (mm) Length
Ft. (m)
22 (0.8) 1,800 (549)
20 (1.0) 2,890 (881)
18 (1.2) 4,600 (1,402)
16 (1.5) 7,320 (2,231)
14 (1.8) 11,650 (3,551)
Table 5: Data Expansion Loop Wire
Specifications
POPIT
DATA
(–) (+) LOOP
UP TO 63 POPITS
POPIT
DATA
(–) (+) LOOP
UP TO 63 POPITS
© 2004 Bosch Security Systems, Inc.