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D7212G Operation and Installation Guide
D7212G
Page 37© 2003 Bosch Security Systems 4998138544C
Off-board Points
8.0 Off-board Points
8.1 Point (ZONEX) Bus D7212G Terminals
The D7212G can use POPIT (Point of Protection Input Transponder) Modules to provide up to 32 off-board points,
bringing the total number of points the D7212G can monitor to 40.
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
bus on the panel, Terminals 3 and 9 for powerand Terminals 27 and 28 for data.
If a programmed POPIT is disconnected from the expansion loop, a missing condition appears immediately and the event is
logged. The missing condition may also be transmitted to a central station or printed to an on-site printer, if programmed to
do so. See the D7212G Program Entry Guide (P/N: 4998138538) for programming options.
Extra Point events are generated when a POPIT is connected to the data expansion bus but does not have a Point Index
assigned to it. Shown below are instances when an EXTRA POINT event will or will not be generated.
If a POPIT is connected to the data expansion bus but does not have a Point Index assigned to it and…
· the data expansion bus becomes disconnected, no trouble condition is annunciated or displayed at command
centers and the EXTRA POINT event will not be generated. (However, POPIT’s that are programmed with a
Point Index will immediately go missing.)
· the data expansion bus restores to a normal condition from an open, a trouble condition will annunciate and
display at the command center. In addition, an EXTRA POINT event is generated, logged, and may be
programmed to be sent to the central station or printed to an on-site printer.
· the point input goes from an electrically normal state to an open or shorted state, the command center will
neither annunciate nor display a trouble condition. No EXTRA POINT event will be generated.
· the system is presently in a Service Walk Test and the point input goes from an electrically normal state to an open
or shorted state, the command center will neither annunciate nor display a trouble condition. However, an
EXTRA POINT event will be logged and printed to an on-site printer, if programmed. Note: The Service Walk
Test will never display a points’ electrical state as ‘Extra’.
If the positive or negative leg of the data expansion bus is shorted to earth ground and Ground Fault Detect is enabled, a
general GROUND FAULT event is generated.
If the positive or negative leg of the data expansion bus becomes disconnected then all POPIT’s beyond the break will report
as a missing condition.
If the data expansion bus becomes shorted then all POPIT’s will report a missing condition and a PT BUS TROUBLE event is
generated. When the data expansion bus restores from a shorted condition, a PT BUS RESTORE event is generated and if
there are POPIT’s connected to the data expansion bus without a Point Index assigned to it, then an EXTRA POINT event
will be generated.
If the positive or negative leg of the data expansion bus becomes shorted to a Common terminal on the D7212G then all
POPIT’s will report a missing condition. In addition to this, a PT BUS TROUBLE event will also be generated.
If Terminal 28 becomes shorted to a Common terminal, a PT BUS TROUBLE event will not be generated. However, a short
between Terminal 27 and a Common terminal will generate a PT BUS TROUBLE event and the command center will display
SERVC ZONEX 1. If Terminal 27 and Terminal 28 are shorted together, a PT BUS TROUBLE event is generated and the
command center will display SERVC ZONEX 1.
The D7212G will respond to missing point conditions based on how the points are programmed and which armed state the
area is in that the point is assigned to. For example, if an interior motion detector point went missing during a disarmed
state, a MISSING TROUBLE event would be generated. However, if the point went missing while the area was Master
Armed, a MISSING ALARM event would be generated. Non-fire 24-hour points always generate a MISSING ALARM event
whereas Fire points always generate a MISSING FIRE trouble event.