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9.4.7
OctoPOPIT Sensor Loops
Only the resistance on the loop limits the number of
normally-open or normally-closed detection devices
each sensor loop can supervise. Resistance on each
sensor loop must be less than 100 Ω with the detection
devices connected.
Certain UL and NFPA applications can limit the
number of detection devices. Consult the appropriate
UL or NFPA standards.
The OctoPOPIT detects open, short, closed, normal,
and grounded circuit conditions on its sensor loops and
sends the conditions to the control panel. Each sensor
loop is assigned a point number and sends signals 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.
The OctoPOPIT has two rows of terminal numbers. In
the row nearest to the terminal blocks, the positive
outputs for the sensor loops are labeled P1 to P8.
Sensor loop outputs P1 and P2, P3 and P4, P5 and P6,
and P7 and P8 share common terminals. The common
terminals for each pair are labeled COM.
Terminate each OctoPOPIT sensor loop with a 1 kΩ
EOL resistor. Attach a resistor even if you do not
enable the loop. The OctoPOPIT includes a D105BL
resistor for each sensor loop. Refer to Figure 16.
Do not duplicate point assignments. Points do not
function properly if assigned to both an OctoPOPIT
sensor loop and a POPIT, two OctoPOPIT sensor
loops, or to two POPITs.
Bosch Security Systems, Inc. | 5/05 | F01U003805B
D7212GV2 | Operation and Installation Guide | 9.0
Figure 16: D8128D OctoPOPIT Sensor Loops
1 - D8128D OctoPOPIT
2 - To control panel
3 - To additional OctoPOPIT sensor loops
4 - OctoPOPIT sensor loops
Ω
5 - 1 k
eight)
9.5
Testing Off-Board Points
Use the Service Walk Test to test off-board points.
Refer to the D9412GV2/D7412GV2/D7212GV2
Installation and Troubleshooting Quick Reference Guide
(P/N: F01U003638) for instructions. Test to ensure that
all off-board points operate properly.
Walk Test and Service Walk Test Do Not Show
Extra Points: If the point assignment switches on a
POPIT or OctoPOPIT are set incorrectly, missing and
extra points can occur. If the same point number is
assigned to two or more POPITs or OctoPOPITs, none
of the points with that number test correctly. Refer to
Section 9.1 Point (Zonex) Bus: D7212GV2 Terminals on
page 31.
COM IN OUT+12V P1 COM P2
P3 COM P4 P5 COM P6
2
3
5
EOL resistor (P/N: P105BL, package of
Off-Board Points
1
P7 COM P8
4
41
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