BBV TX1500 system, Installation Manual, Page: 12 / 31

TX1500 Manual Combined 1Oct03 PSC Page 12 of 31 Matrix
16 ALARM INPUT CARD
Each alarm card provides up to 16 individual normally closed volts free alarm inputs. The card communicates
via B-BUS with the monitor output card. Power comes via either the B-BUS interface when the alarm card is
mounted in the Tx1500 rack or via an external 9-12Vac/dc supply when mounted remotely.
The power led is used as a status indica tion and shows the following:
Mainly ON, flashing OFF when the MONITOR card polls it approx 2-3 times every second. (NORMAL)
OFF permanently – ALARM card not powered or faulty.
ON permanently – Not polled by MONITOR card, b-bus cable faulty or ALARM card faulty.
Fig 19. Alarm card front panel view
Fig 20. Alarm card internal view
Fig 21. Alarm card SW1 address switch settings
The input stage of each alarm is as shown on this circuit fragment.
Fig 22. Alarm card alarm input circuitry
+5Vdc
56K
Alarm
Input
TVS
0V
10K
uProcessor
alarm inputs must
be volts free
normally closed
contact
B-BUS
ALARM INPUT 1-8 ALARM INPUT 9-16
OUTPUTS
12Vdc
1 2 3 4 5 6 7 8
ON
SW1 is used to set the alarm card address as follows:
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
1 2 3 4 5 6 7 8
ON
Card 1 alarm 1-16 Card 2 alarm 17-32 Card 3 alarm 33-48
Card 4 alarm 49-64 Card 5 alarm 65-80 Card 6 alarm 81-96
Switches 7 & 8
BBUS RS485 Termination
ON = Terminated
OFF = Un-terminated
Must be ON if the alarm card is at
the end of line and OFF otherwise.
Alarm card 6 shown as end of line.
02002
SW1
LD1
B-BUS
RY2 RY1
J1