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ZONESENSE DH4
OPERATORS MANUAL
5.1 Inputs
(TB1)
5.1.1 Common Terminal (TB1 Com)
Used for inputs requiring a 0V potential to initiate a change of state in an output.
5.1.2 Class Change Input (TB1 Com / 1)
This input allows a remote voltage free, closing set of contacts to operate the Alarm outputs. The
non-latching input is active when it is pulled down to 0v potential. When active the Alarm Outputs will
operate continuously, no visual indication is given and no other output shall operate.
5.1.3 Alert Input (TB1 Com / 2)
This non-latching input allows a remote voltage free, closing set of contacts to operate the Alarm
outputs. The input is active when it is pulled down to 0v potential. When active the Alarm Outputs will
pulse at a rate of 1sec on 1 sec off, no visual indication is given and no other output will operate.
5 6 7 8
TB1
TB2
+ Z2 -
+ Z3 -
+ Z4 -
+ Z1 -
1 2 3 4
1 2 3
Class Change
(CC) Input
C CC ALT
Alert
Input
Figure 6: Typical Class Change / Alert Input Termination and location on the Main Ctrl Card