4
900 Series V5.0: Installation Guide, April 1999
Product
Series 900
Series 950
Series
950M
Marine
Series 970
Intrinsically
Safe
Series 990
Discovery
Part Number
Part Number
Part Number
Part Number
Part Number
Relay Base for Fire Monitor
---- DB950R ----
----
----
Base for Isolator
Discontinued DB951 DB951M
----
----
Isolator Base (for 10 devices)
---- DB960 ---- ---- ----
Isolator Base (for 20 devices)
---- DB961 ---- ---- ----
Fire monitoring controllers:
Loop Powered Beam Detector
---- FD950 ---- ---- ----
Zone Monitoring Unit
Discontinued II955
----
----
----
Loop Powered Sounder
---- AS950 ---- ---- ----
Sounder Circuit Controller
Discontinued IO956
----
----
----
Input/output units:
1 Output
Discontinued IO955
----
----
----
1 I/O
Discontinued IO950
----
----
----
3 I/O
IU922
---- ---- ---- ----
Mini Switch Monitor Unit
---- II950 ---- ---- ----
Mini Switch Monitor with Interrupt
---- II951 ---- ---- ----
Switch Monitor Unit
Discontinued II952
----
----
----
Switch Monitor Plus
---- II953 ---- ---- ----
Din rail mounted units:
Duel Isolator
---- IU950D ---- ---- ----
Zone Monitoring Unit
---- II955D ---- ---- ----
Sounder Control Unit
---- IO956D ---- ---- ----
1 Output
---- IO955D ---- ---- ----
1 I/O
---- IO950D ---- ---- ----
Switch Monitor Unit
---- II952D ---- ---- ----
Switch Monitor Plus
---- II953D ---- ---- ----
Intrinsically safe accessories:
Protocol Translator (1 Channel)
---- ---- ---- ----
PT971
Protocol Translator (2 Channel)
---- ---- ---- ----
PT972
Zener Barrier
---- ---- ---- ----
GBX70
2.2. Addressing
Universal address cards are supplied with the mounting bases. A universal address card
slides into a mounting base and the fire monitor, when fitted to the base, reads the
address from the card.
A universal address card has seven removable pips that correspond to a seven bit binary
value. Each pip has an associated value, which is shown on the card: 1, 2, 4, 8, 16, 32,
64 (see Figure 1). Removing a pip makes this value valid, and remaining pips have a
value of “0”. The address is the sum of the values of all removed pips.
