Power Wiring
CAUTION: The
NOTE: Whenever possible, terminate and verify power and communication to all modules before terminating any inputs and outputs.
1.Terminate AC power at the wiring source (usually a circuit breaker or other AC source).
2.Apply power to the transformer.
3.Turn the
4.If you are using an internally grounded transformer, terminate the Earth Ground wire to the Gnd screw terminal as indicated in Figure 4.
CAUTION: Be sure to follow proper polarity on power connections. Note INCORRECT power wiring in Figure 5.
If the transformer is not internally grounded, terminate the two power wires as indicated in Figure 6.
5.Verify that 24 VAC is present at the power input terminals and turn the
6.Once the power wiring procedure has been completed, the "Run" LED should turn on and begin blinking. If this does not occur, turn the power switch off and check for wiring errors.
Figure 4: | Figure5: INCORRECT wiringofthe | Figure 6: |
powered by transformer with Earth | powered by transformer with Floating | |
Ground | transformer with Earth Ground | Ground |
Rev. | 6 | © |