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The D9412/D9112 uses point programming to interpret the sensor loop information reported by the POPITs and make the
appropriate system response.
2.4. 1
D8125 POPEX/ D8127 and D9127 POPIT Modules
D8127 and D9127 POPITs use the D8125 POPEX module to report to the D9412/D9112. Each D8125 supports up to 119
POPIT points. Connect two D8125 modules to the D9412/D9112 to bring the combined total number of POPIT and on-
board points to 246. Points 9 to 127 connect to the first POPEX module. Points 129 to 247 connect to the second POPEX
module. The D9412/D9112 reserves Points 128 and 248 for internal use. The D9412/D9112 only annunciates activity for each
POPIT, not each detection device connected to the sensor loop.
There are two versions of the D8127 and D9127 modules. Both module enclosures are made of UL Listed fire resistant
material. D8127T and D9127T modules contain tamper switches. D8127U and D9127U modules come with untampered
covers. Unless the module is mounted in a tampered enclosure, UL requires D8127T and D9127T modules for certified
accounts.
2.4.1. 1
Listings
The D8125 POPEX and the D8127 and D9127 POPIT Modules are UL Listed for Local or Police Connected Burglar Alarm,
Central Station Burglar Alarm, Household Burglar Alarm, Central Station Fire, Local Fire, Remote Station Fire, Household
Fire, and Electrically Actuated Transmitter Applications.
See the D9412G/D7412G Approved Applications Compliance Guide to determine the required equipment and enclosures for
the application.
2.5
D9112B1/D7212B1 Point Expansion
The black-on-white and white-on-black circled numbers correspond to the terminal labels on the faceplate of any of the 9000
Series panels.
You can use POPIT modules to provide up to 126 off-board points, bringing the total number of points the D9112B1 can
monitor to 134, The D7212B1 can monitor up to 40 off-board points for a total of 48 points.
Each off-board point requires a POPIT module.
POPITs connect to supervised two-wire data expansion loops run from POPIT to POPIT throughout the premises. Data
expansion loops connect to a D8125 POPEX module. POPEX modules connect to the point buss on the panel, Terminals 23
and 24 for power (Terminals 3 and 9 for D7212B1) and Terminals 25 and 26 (D9112B1 only), or 27 and 28 for data.
If a POPIT is disconnected from the expansion loop, a trouble message appears immediately.
If you connect a POPIT that is programmed for a point number that does not appear in the program for the D9112B1/
D7212B1 to the expansion loop, it appears as an extra point at the command centers when the point is faulted, and during
the service walk test.
Placing a short on the data expansion loop generates a PT BUS TROUBLE report. The panel sees all points on the shorted
expansion loop as shorted, and responds according to point programming.
POPIT modules monitor their sensor loops for three conditions; loop normal, loop open, and loop shorted. They report
these three conditions to the control panel. A ground on a POPIT sensor loop reports as an open.
The D9112B1/D7212B1 uses point programming to interpret the sensor loop information reported by the POPITs and make
the appropriate system response.
2.5.2
D8125 POPEX Module/D8127 and D9127 POPIT Modules
D8127/D9127 POPITs use the D8125 POPEX Module to report to the D9112B1. Each D8125 supports up to 63 POPIT points
(40 for the D7212B1). Connect two D8125 Modules to the D9112B1 (one for D7212B1) to bring the combined total number
of POPIT and on-board points to 134 for the D9112B1. Points 9 to 71 connect to the first POPEX module. The D9112B1
reserves Points 72 and 136 for internal use. Points 73 to 136 connect to the second POPEX module. The D9112B1 only
annunciates activity for each POPIT, not each detection device connected to the sensor loop. For the D7212B1, Point 9 to 48
connect to the POPEX module.
© 2004 Bosch Security Systems, Inc.
D8125 Operation and Installation Guide
Page 13
D8125
Overview
74-04247-000-N
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