Extron electronic PS 123 manual Mounting options, Rack mounting, part #60-190-01, part #60-604-01

PS 123, cont’d

CStripping the wires to expose less than the recommended amount may cause them to slide out of the connector too easily, even if they are tightly pinched by the captive screws.

CDo not tin the stripped power supply leads before attaching the captive screw plug to them. Tinned wires are not as secure in the captive screw connectors and can be easily pulled out. They may also break after being bent several times.

3.	Slide the leads into the supplied 2-pin captive screw plug
	and secure them, using an Extron Tweeker or other small
	screwdriver.
4.	Use the supplied tie wrap to strap the power cord to the
	extended tail of the connector.

Mounting options

There are several optional accessories for mounting the PS 123. They include the following Extron part numbers:

• RSU 129 1U 9.5" Universal Rack Shelf	(part #60-190-01)
• RSB 129 1U 9.5” Deep Basic Rack Shelf	(part #60-604-01)
• MBU 125 1U Under-Desk Mounting	(part #70-077-01)
• PMK 350 Low Profile Multi-product	(part #70-563-02, -03)
Projector Mounting Kit
• PMK 450 Easy Installation	(part #70-618-02, -03)
Multi-product Projector Mounting Kit

Rack mounting

UL rack mounting requirements

The following Underwriters Laboratories (UL) requirements pertain to the installation of the PS 123 into a rack.

•Elevated operating ambient temperature — If the equipment is installed in a closed or multiunit rack assembly, the operating ambient temperature of the rack environment may be greater than room ambient temperature.

Therefore, consider installing the equipment in an environment compatible with the maximum ambient temperature (Tma) specified by the manufacturer. For the PS 123, the Tma is 122 °F (50 °C).

•Reduced air flow — Installation of the equipment in a rack should be such that the amount of air flow required for safe operation of the equipment is not compromised.

•Mechanical loading — Mounting of the equipment in the rack should be such that a hazardous condition is not created due to uneven mechanical loading.

•Circuit overloading — Consideration should be given to the connection of the equipment to the supply circuit and the effect that overloading of the circuits might have on overcurrent protection and supply wiring. Appropriate consideration of equipment nameplate ratings should be used when addressing this concern.

•Reliable earthing (grounding) — Reliable earthing of rack-mounted equipment should be maintained. Particular attention should be given to supply connections other than direct connections to the branch circuit (e.g. use of power strips.

Rack mounting procedure

For optional rack mounting, mount up to four PS 123s on an RSU 129 9.5" 1U Universal Rack Shelf (part #60-190-01) (figure 8) or an RSB 129 9.5" 1U Basic Rack Shelf (part

#60-604-01).

1U Universal Rack Shelf

1/2 Rack Width Front False

Faceplate

1/4 Rack Width Front False

Faceplate

Both front false faceplates use 2 screws.

(2) 4-40 x 3/16" Screws

Use 2 mounting holes on opposite corners.

Figure 8 — Rack mounting the PS 123

1. If feet were previously installed on the bottom of the PS 123 unit, remove them.

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