Checking outputs

Checking outputs

Follow the procedures in this section to test outputs for proper operation.

IMPORTANT

Perform the tests in this section before providing power to the termina- tion board or installing the main circuit board. Failure to do so will result in incorrect multi-meter readings.

To test outputs for proper operation, you need the following tools:

•Digital multi-meter

•Small flat-tip screwdriver

Checking binary outputs

To check binary outputs for proper operation:

1.Set the multi-meter to measure Vac, then measure the voltage across the binary output at the common and signal screw terminals.

The measured voltage should be less than 0.1 Vac. If the voltage is greater than this, the load may turn on and off unexpectedly. Check for the following problems:

•A shared power supply may be incorrectly connected. Check the wire to make sure that no additional connections have been made.

•The wire may have an induced voltage somewhere along its length.

2.Set the multi-meter to measure Vdc, then measure the voltage across the binary output at the common and signal screw terminals.

The measured voltage should be less than 0.1 Vdc. If the it is greater than this, a shared power supply may be incorrectly connected. Check the wire to make sure that no additional connections have been made.

CAUTION

Equipment damage!

Continue to step 3 only if you completed steps 1 and 2 successfully. Measuring resistance may damage the meter if the voltage is too high.

3.Set the multi-meter to measure resistance. If you completed steps 1 and 2 successfully, measure the resistance across the binary output to confirm that there are no shorts and no open circuits.

Resistance is load dependent. Pilot relays have a relatively low resis- tance of less than 1 kΩ, but some actuators have a high resistance. Check to see what kind of binary output is connected before checking for open and short circuits.

Checking 0–10 Vdc analog outputs

To check 0–10 Vdc analog outputs for proper operation:

BAS-APG001-EN

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Trane Engineered Smoke Control System for Tracer Summit, BAS-APG001-EN manual Checking outputs, Checking binary outputs
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BAS-APG001-EN, Engineered Smoke Control System for Tracer Summit specifications

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