Western Telematic AFS-16-1 - Manual (Page 79)

7-12
Alarm Configuration
7.6.1. Monitor Input Level Settings
When the Monitor/Alarm Input feature is properly configured, the AFS-16 can trigger an
alarm and/or perform A/B switching operations when the signal at Pin 4 (Monitor Input)
on the Control Module AUX connector goes high or low. In set up this feature, you must
first use the Control Card Jumper to select the non-active (non-alarm) state, and then
use the Monitor/Alarm Input configuration menu to select the active/alarm state (the
signal level that will trigger an alarm) as described in the Sections that follow.
Notes:
• The Monitor Input signal (Pin 4) is always measured relative to the signal at
the common ground (Pin 5).
• A "Low" signal should be between Zero (0) Volts and -48 Volts and a "High"
signal should be between +5 Volts and +48 Volts.
1 0
High Low
Figure 7.2: Control Module Jumper
1 0
Control Card
Jumper
Back Edge of
Control Card
AUX Connector
Pin Out
Pin
Signal
5 Ground
4 Monitor Input
Figure 7.3: Control Module AUX Connector - Monitor Input and Ground