Check-out procedure for binary inputs
BMTX-SVN01C-EN 29
Check-out procedure for binary inputs
To test inputs for proper binary input operation, you need the following
tools:
• Digital multimeter
• Small flat-tip screwdriver
IMPORTANT
Perform this test before providing power to the termination board or
installing the main circuit board. Failure to do so will result in incorrect
multimeter readings.
To check binary inputs for proper operation:
1. Make sure that the sensor is connected and powered on.
2. Set the multimeter to measure Vac, then measure the voltage across
the input connections at the signal (BIP1 or BIP2) and common
(GND) screw terminals.
The measured voltage should be less than 0.1 Vac. If the voltage is
greater than this, the input readings may change erratically.
3. Set the multimeter to measure Vdc, then measure the voltage across
the input at the signal (BIP1 or BIP2) and common (GND) screw ter-
minals.
The measured voltage should be less than 0.1 Vdc. If the voltage is
greater than this, the input readings may be offset.
CAUTION
Equipment damage!
Continue to step 4 only if you completed steps 2 and 3 successfully.
Measuring resistance may damage the meter if the voltage is too high.
4. Set the multimeter to measure resistance. If you have completed
steps 2 and 3 successfully, measure the resistance across the input.
The resistance should be less than 200 Ω when the binary input is
closed and greater than 1 kΩ when it is open.
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