NEC 616 manual Connecting and Testing the Power Supply, Set PSU Power Switch to Off Position

220 Connecting and Testing the Power Supply

Note 1: Verify that the AC outlet is supplying 11% AC and provides good conduit ground. If there is a problem with the AC voltage, have it corrected.

If there is no conduit ground, provide alternate ground as explained in Section 120, “Grounding Requirements”, of this manual.

Note 2: Before proceeding, ensure that the PS-6-I Power

Cord is unplugged. The PS-6-I Power Switch should be off, and its power indicator lamps should

1.Remove the 9-pin connectorended cable of the power supply from the connector of the KSU.

2.Plug the AC cord of the power supply into an AC outlet. Set PSU Power switch to on position. The PSU Power Indicator Lamp should light. Use a voltmeter, to the figure below:

Fig. 220-I Front View of g-pin Connector of PS-6-l

3.Set PSU Power Switch to Off Position

Note:	Verify	that step 3 has been	completed before	pro-
I	ceeding.	Verify that PS-6-I	Power Indicator	Lamp
	is off:

4.Connect the 9-pin connectorended cable of the Power Supply Unit to the 9-pin connector of the KSU. Ensure that the looking tabs are engaged.

5.Turn the PSU Power Switch on. DC voltage (under load) can now be read on the TBl terminal block located on the left side of KSU.

		+41v	7
		+24V
t	1
I03		+12v
I@/		+5v
Ie3		+41G
I@I		+24G
I	I
H, I		+5G
cl3
		+12G
e3		+12G
		+5G

Fig. 220-2 View of TBI Terminal Block

When measuring DC voltages, note that each voltage has its own reference ground.

6.The Power Supply Switch must be set in the Offposi- tion before proceeding with installation.

Note: Veriyy that Step 6 has been completed before pro- 1 @) ceeding. Verify that PS-6-i Power indicator Lamp- I

is oft

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