Bosch Appliances D9112 Off-Board Points

D9112 Operation & Installation Manual

Page 35

74-06144-000-C 2/96

Off-Board Points

You can use POPIT (Point of Protection Input Transponder) modules to provide up to

126 off-board points, bringing the total number of points the D9112 can monitor to 134.

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 (Point of

Protection Expander) module. POPEX modules connect to the point buss on the panel,

terminals 23 and 24 for power, and terminals 25 and 26, or 27 and 28 for data.

If a POPIT is disconnected from the expansion loop, a trouble message appears

immediately. See the

D9112 Program Entry Guide

(74-06145-000) for programming

options.

If you connect a POPIT that is programmed for a point number that does not appear in

the program for the D9112 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 D9112. A ground on a POPIT

sensor loop reports as an open.

The D9112 uses point programming to interpret the sensor loop information reported by

the POPITs and make the appropriate system response.

D8127 POPITs use the D8125 POPEX module to report to the D9112. Each D8125

supports up to 63 POPIT points. Connect two D8125 modules to the D9112 to bring the

combined total number of POPIT and on-board points to 134. Points 9 to 71 connect to

the first POPEX module. The D9112 reserves Points 72 and 136 for internal use. Points

73 to 135 connect to the second POPEX module. The D9112 only annunciates activity for

each POPIT, not each detection device connected to the sensor loop.

There are two versions of the D8127 modules. Both module enclosures are made of UL

listed fire resistant material. D8127T modules contain tamper switches. D8127U

modules come with an untampered cover. Unless the module is mounted in a tampered

enclosure, UL requires D8127T modules for certificated accounts.

POPEXs manufactured prior to the expiration date (located on the packaging box) of

X9434 may cause POPITs to report as missing after the AC has failed and after the panel

goes into a low battery condition but before the panel goes into load shed. POPEXs

manufactured after X9434 will not cause missing POPITs prior to load shed on an AC

FAIL.