System Operation Digitize Inc.
14 700271-0001 Rev. G 05/13
4.8 Alarm Relay
The Alarm Relay has a set of Form C relay contacts that “turn on” whenever any of the 16
EOL zones remains in an “Alarm” condition. All of the 16 zones must return from the Alarm
state before the relay will “turn off”. This is the default setup.
Alternately, using Function 15, the Alarm relay can be programmed for Serial Non-
Interfering mode. In this setting, just prior to a transmission, the Code relay will open and the
Alarm relay will code out the transmission. At the end of the transmission, the Alarm relay
will turn off and the Code relay will close.
4.9 Trouble Relay
The Trouble Relay has a set of Form C relay contacts that “remain on” whenever the panel is
in service. If all power is removed from the panel, the Trouble Relay will “turn off”. If any
Trouble condition exists on the panel, the Trouble relay will “turn off”.
4.10 Buzzer
The DET-16 controller board contains an 85 dB buzzer. The buzzer will sound when any of
the following conditions occur:
1. AC Power Failure
2. Battery Failure
3. Telegraph Loop Open and a transmission is about to occur.
4. Any of the 16 EOL zones goes into a Trouble State, if the zone is programmed to
transmit a code on a trouble condition.
Press the CLR button to silence the Buzzer. The Buzzer also has a timeout feature that will
automatically silence the Buzzer. See Function 8.
4.11 LCD Display
The DET-16 panel also contains a 4 line by 20 character LCD display with green LED
backlighting. During normal operation the backlight will remain off. The backlight turns on
during a telegraph transmission and anytime there is keypad activity.
4.12 Loop Shunt Key Switch
The Loop shunt key switch allows the panel to be quickly shunted from the Telegraph Loop
without having to disconnect the wiring for the panel.
To shunt the panel, the operator installs a key in the Loop Shunt Key Switch located on the
front panel and turns it ¼ turn clockwise.
The door to the enclosure cannot be closed while the panel is shunted from the loop.
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