Extron electronic PS 123 manual Output power wiring the DC output connectors

PS 123, cont’d

7.	From the rear panel end, pull the EMT plate (see figure 3)
	out of the enclosure.
8.	Thread the 18-gauge power wires through the length of the
	electrical conduit tube.
9.	Install the EMT adapter plate (figure 1, C, on page 1)
	(with conduit attached) into the opening from which you
	removed the EMT plate in step 7. Use the Phillips head
	screws (figure 3) that you removed in step 2 to attach the
	adapter plate.

10. Slide the conduit nut (figure 6, below) over the bundle of wires exiting the conduit and onto the conduit itself inside the PS 123. Hand-tighten the nut.

Terminal Block Hot Terminal Metal Tab

Tie Wrap

Neutral Terminal Ground Wire Nut Conduit Nut

Figure 6 — Terminal block and conduit wiring

11.Attach and screw down the hot and neutral wires exiting from the conduit to their corresponding screws on the terminal block.

WEnsure that you observe wire polarity. Figure 6 shows the location of the neutral and hot poles on the mother board connector. The conduit wiring harness' neutral wire is identified with a tag marked "N" (neutral).

12.Attach the ground wire from the conduit to the PS 123's bare metal plate bottom, securing it by reattaching the ground wire nut.

13.Thread a tie wrap through the metal tab on the bare metal bottom of the PS 123, place all the wires within its cradle, and zip the tie wrap over the bundle of wires.

14.Retighten the conduit nut from step 10 (figure 6 above) to ensure that it firmly secures the conduit EMT adapter plate to the power supply.

15.Use the six screws you removed in step 3 to secure the top cover of the PS 123 back onto its bottom board (figure 4 on page 5).

Output power — wiring the DC output connectors

The PS 123 can power multiple products through its 3.5 mm, 2-pole captive screw connectors.

NFor applications in which power supply voltage is critical, verify the power cord’s polarity before connecting it by plugging in the power supply with no load. Check the output with a voltmeter.

WIf you are verifying power supply polarity with a voltmeter, the two power cord wires must be kept separate while the power supply is plugged in.

To connect products to the outputs of the PS 123, do the following:

1.	Cut the DC output cord to the length required.
2.	Strip the jacket of the conductor wire to expose 5/16"
	(7 mm) of the wire (figure 7).
Smooth	Ridges
A	A
		SECTION A–A
	Power Supply
	Output Cord	Tie Wrap

Orange Captive Screw

Connector

Figure 7 — Power connector wiring

WThe ideal length of exposed wire is 5/16"

(7 mm). Exposing more than the specified length of the copper wires could allow the stripped wires to touch each other, causing a short circuit. This could result in the external DC power supply overheating

and/or burning.

 PS 123 12 VDC, 3 Amp Power Supply • User's Guide PS 123 12 VDC, 3 Amp Power Supply • User's Guide