TM 10-3510-226-23
0025 00
TEST-CONTINUED
Test the DC Power Supply
WARNING
This equipment operates at high voltages. Use extreme caution, observe all warnings,
and follow all safety procedures. Failure to observe safety precautions may result in
injury or death to personnel.
1. Ensure power is supplied to the PLC.
2. Open PLC enclosure.
3. Ensure the 24 VDC indicator LED (Figure 15, Item 18) is lit.
4. Use a voltmeter to test for 24 VDC output (Figure 15, Item 19) between the + and terminals on the
power supply (Figure 15, Item 20).
5. If there is no 24 VDC output (Figure 15, Item 19) and the LED (Figure 15, Item 18) is not lit, use a
voltmeter to test for 120 VAC input (Figure 15, Item 21) to power supply (Figure 15, Item 20). If no
voltage is supplied to power supply, test surge arrestor (Figure 15, Item 22) IAW procedures given in
this WP.
6. Replace an inoperative power supply (Figure 15, Item 20).
7. Close PLC enclosure and monitor for normal operation.
0025 00-15