External control of the alarm – GW Instek PEL-3000 Series User Manual User Manual
Page 150
PEL-3000 User Manual
148
External Control of the Alarm
Description
An alarm can be activated/deactivated using
external control with the J1 connector (pins 10,
12). 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.
PEL-3000
Switch
Analog
connector
12
10
+5V
A COM
10k
Ω
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