TEXIO LSG-1050H, Instruction Manual

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4-1-13. External Alarm input
Description Pins 10 and 12 of the J1 connector are the alarm inputs.
An alarm can be activated/deactivated using external
control with the J1 connector. When the alarm is
activated, an EXT.AL message is also output. The alarm
can be activated by an external device or by a parallel
slave unit.
The alarm is activated by sending a low-level signal. The
operating threshold level is TTL.
Pin Inputs
Pin 10 is internally pulled up to 5V with a 10kΩ resistor
when open. When closed, pin 10 is pulled down to the A
COM ground level.
Connection LSG-H
Switch
Analog
connector
12
10
+5V
A COM
10k
Ω
4-1-14. Alarm Status
Description Pins 16 and 17 of the J1 connector are used to
monitor whether the alarm is on or off.
Pin out The Alarm Status pin is a
photo-coupled open-
collector output.
17
16
Photo-coupler input: 30V max, 8mA, max.