Octopopit Sensor Loops; Testing Off-Board Points; Figure 23: D8128D Octopopit Sensor Loops - Bosch D9412GV3 Operation And Installation Manual

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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  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 has an assigned 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 k
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 23 on
page 49.
Do not duplicate point assignments. Points do not
function properly if assigned to an OctoPOPIT sensor
loop and a POPIT, to two OctoPOPIT sensor loops, or
to two POPITs.
Bosch Security Systems, Inc. | 10/10 | F01U143070-03
D9412GV3/D7412GV3 | Operation and Installation Guide | 9.0

Figure 23: D8128D OctoPOPIT Sensor Loops

COM IN OUT+12V P1 COM P2
2
1 - D8128D OctoPOPIT
2 - To control panel
3 - To additional OctoPOPIT sensor loops
4 - OctoPOPIT sensor loops
5 - 1 kΩ EOL resistor (P/N: P105BL, package of
eight)
9.5

Testing Off-Board Points

Ω
Use the Service Walk Test to test off-board points.
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: D9412GV3
Terminals and D7412GV3 Terminals on page 36.
Off-Board Points
1
P3 COM P4 P5 COM P6 P7 COM P8
3
4
5
49