Wiring Multiple D8128D Modules To The Control Panel Using Molex Connectors; Wiring Octopopit Sensor Loops; Octopopit Sensor Loops; Figure 4: Wiring Multiple D8128D Modules Using Molex Connectors - Bosch D8128D Installation Manual

D8128D
3.3.2

Wiring Multiple D8128D Modules to the Control Panel using Molex Connectors

Each D8128D includes a 12-in. (30 cm) female-to-female Molex cable assembly.
P1 and P2 are Molex connectors that parallel the COM, IN, OUT and +12 VDC terminals on the terminal strip. In
installations using multiple D8128D Modules, use these connectors (as opposed to terminals) with the supplied
cable. When connecting D8128D Modules directly to the control panel, use the terminal strip.
The supplied Molex connectors are keyed. A Molex plug can only fit in one direction. Ensure the connector is
correctly attached, the red wire is on the bottom of P1 (or P2), and the black wire is on the top.
When connecting multiple D8128D Modules to a control panel, connect the control panel terminals to P1 or the
Com, In, Out, and +12 V Terminals on the first D8128D. Then connect P2 of the first D8128D to P1 of the
second D8128D and so on. Refer to Figure 4.
Control Panel
TERMINAL 3 ON
D9412/D9112/D7212/
D7212G/D7412
TERMINAL 9 ON
D9412/D9112/D7212/
D7212G/D7412

Figure 4: Wiring Multiple D8128D Modules Using Molex Connectors

3.4

Wiring OctoPOPIT Sensor Loops

3.4.1

OctoPOPIT Sensor Loops

Only the resistance on the loop limits the number of normally open (NO) and/or normally closed (NC) detection
devices each sensor loop can supervise. Resistance on each sensor loop must be less than 100 Ω with the
detection devices connected.
The OctoPOPIT detects open, short, normal, and grounded circuit conditions on its sensor loops and transmits
the conditions to the control panel. Each sensor loop is assigned a point number and transmits to the control
panel separately. Use twisted-pair wire for the OctoPOPIT sensor loops to avoid EMI problems. Run wires away
from the premises telephone and AC wiring. If you suspect a noisy environment, use shielded cable.
F01U070537-07
P2
P1
COM IN OUT+12V
First D8128D
28
27
26
25
24
23
COM IN OUT+12V P1 COM P2 P3 COM P4 P5 COM P6 P7 COM P8
First D8128D
Control Panel
28
27
26
TERMINAL 3 ON 25
D9412/D9112/D7212/
D7212G/D7412 24
TERMINAL 9 ON
23
D9412/D9112/D7212/
D7212G/D7412

Figure 5: D8128D Sensor Loops

D8128D Installation Guide
P2
P1
COM IN OUT+12V
Second D8128D
D8128D OctoPOPIT
TO ADDITIONAL OCTOPOPIT
SENSOR LOOPS
OCTOPOPIT
SENSOR LOOPS
1 kΩ EOL RESISTOR
(P105BL, 15-03130-004)
Page 10
P2
Up to 15 per
P1
ZONEX Bus
COM IN OUT+12V
Third D8128D
© 2015 Bosch Security Systems, Inc.