D8125 Operation and Installation Guide
D8125
Page 22
© 2004 Bosch Security Systems, Inc.
74-04247-000-N
Installation
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
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.
DATA
(–) (+) LOOP
POPIT
DATA
(–) (+) LOOP
POPIT
DATA
(–) (+) LOOP
POPIT
DATA
(–) (+) LOOP
POPIT
DATA
(–) (+) LOOP
POPIT
DATA
(–) (+) LOOP
POPIT
DATA
(–) (+) LOOP
POPIT
DATA
(–) (+) LOOP
POPIT
(–)
GND
OUT
IN
AUX
UP TO 63 POPITS
NEGATIVE (–)
PO)
(–)
GND
OUT
IN
AUX
UP TO 63 POPITS
NEGATIVE (–)
PO)
(–)
(+)
(–)
(+)
(+)
(+)
ZONE EXPANSION LOOP
ZONE EXPANSION LOOP
D8125
POPEX
MODULE POINTS 9 - 71
POPIT
Switches 1 to 6
33 k
Ω
E.O.L.
RESISTOR
(P/N: 15-03130-002)
D8125
POPEX
MODULE POINTS 73 - 135
Switches 1 to 6
33 k
Ω
E.O.L.
RESISTOR
(P/N: 15-03130-002)
Figure 6: Typical Expansion Loop/POPIT Configuration
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.
