Wiring Data Expansion Loops To Popex Modules; Popit Sensor Loops; Popit Module Point Assignments - Bosch D9412G Operations & Installation Manual

D9412G/D7412G | Operation & Installation Guide |
Combine Data Expansion Loops: The maximum
lengths shown in Table 11 are for all data expansion
loops connected to the same POPEX Module combined.
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.
To connect POPITs to one another in parallel.
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. It is not necessary 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.
Before installing the POPITs, make sure the
resistance on the data expansion loop is no
more than 40 Ω.
Three-inch Clearance for Tampered POPITs: Mount
tampered POPIT Modules at least 7.6 cm (3 in.) apart to
prevent the tamper magnets from interfering with each
other.
8.3.4 Wiring Data Expansion Loops to POPEX
Modules
There are two positive (+) and two negative (-) data
expansion loop terminals on each POPEX Module.
Remember, a maximum of 119 POPITs can be
connected to one D8125 on the D9412G; 67 for the
D7412G (see Figure 14 and Figure 15).
To connect the data expansion loops to the D8125
POPEX Module:
1. Connect the positive (+) data terminal from the first
POPIT on the data expansion loop to one of the
D8125's positive (+) terminals.
2. Connect the negative (-) data terminal from the first
POPIT on the data expansion loop to one of the
D8125's negative (-) terminals.
Bosch Security Systems | 10/03 | 43488E
8.0 Off-Board Points
8.3.5

POPIT Sensor Loops

The number of normally-open and/or normally-closed
detection devices each sensor loop can supervise is
limited only by the resistance on the loop. Resistance on
each sensor loop must be less than 100 Ω not including
the EOL resistor.
Certain UL and NFPA applications can limit the
number of detection devices. Consult the appropriate
UL or NFPA standards.
POPITs detect open, shorted, normal, and grounded
circuit conditions on their sensor loops. They transmit
the condition of their loops to the panel. A ground on
the sensor loop reports as a general system ground fault
condition (see Ground Fault in the D9412G/D7412G/
D7212G Installation and Troubleshooting Quick Reference
Guide). Each POPIT is programmed and transmits to
the panel separately.
Terminate each POPIT sensor loop with the 33 kΩ
EOL resistor (D106F) included with each POPIT.
Use a twisted-pair wire (six twists per foot) in all
POPEX/POPIT installations for both the data
expansion loop wiring and the POPIT sensor loops.
Run wires away from AC sources to prevent AC
induction. If a noisy environment is suspected, use
shielded cable. See Section 8.3 Installing the D8125
POPEX Module.
8.3.6

POPIT Module Point Assignments

Six switches on each POPIT assign the module to a
point number. POPIT switch settings are found in Point
Assignment in the D9412G/D7412G Program Record Sheet.
See Figure 16.
For the D9412G, Points 73 to 127 and 193
to 247 must use the D9127 POPITs. Points
9 to 72 and 129 to 192 can use either
D8127 or D9127 POPITs.
For the D7412G, Points 9 to 72 can use
either D8127 or D9127 POPITs; however,
D9127 POPITs must be used for Points 73
to 75.
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