Extron-electronic RSB 126 User Manual download pdf (Page 13)

SW USB Series • Installation

Installation, cont’d

2-8

SW USB Series • Installation

2-9

Wiring the Power Connector

If using a different external power supply from the one provided

with the SW USB, you may need to wire the connector for it.

To wire the power connector,

1. Cut the power supply’s DC output cord to the length

needed.

2. Strip the jacket to expose 3/16" (5 mm) of the conductors.

Exposing more than 3/16” (5 mm) 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.

Exposing less than the recommended amount may

cause the wires to slide out of the connector too

easily, even if they are tightly pinched by the captive

screws.

3. Slide the exposed leads into a two-pin captive screw plug

and secure them by tightening the screws, using an Extron

Tweeker or other small screwdriver.

4. To verify the power cord’s polarity before connecting

it, plug in the power supply with no load and check the

output with a voltmeter.

5. Use the supplied tie-wrap to strap the power cord to the

extended tail of the connector.

The gure below shows how to wire the power connector.

Orange Captive

Screw Connector

Tie Wrap

Heat

Shrink

1/8”

(3 mm)

7/8”

(22 mm)

3/16”

(5 mm) Max.

Power connector wiring

The two power cord wires must be kept separate

while the power supply is plugged in. Remove

power before wiring.

Do 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.

RS-232 port — Connect a host computer or control system to

this three-pole, 3.5 mm captive screw connector is used for RS-

232 control and status feedback. The SW USB can be controlled

via Extron’s Simple Instruction Set (SIS) commands. This port

can also be used to update rmware.

Your RS-232 computer or control system should not be

one of the host devices connected to the input ports. Use

a separate computer for RS-232 communication.

Contact port — If desired, connect a two- or four-button contact

closure device to this three-pole (SW2) or ve-pole (SW4),

3.5 mm captive screw connector to enable input selection via

contact closure.

RS-232 Pass Thru port — If desired, connect an Extron A/V

switcher to this three-pole, 3.5 mm connector. Commands

issued via the SW-USB front panel, contact closure, or an RS-232

interface on a PC or control system can be sent through this port

to the connected switcher.

Only Extron products can be controlled via this port.

Emulation DIP switches — (SW4 USB Plus only) These DIP

switches enable host emulation to a keyboard and/or mouse

connected to output ports 3 and 4. Switch 1 enables host

emulation to a mouse; switch 2 enables emulation to a keyboard.

When a keyboard or a mouse is connected to port 3 or 4, and

the appropriate switch is set to on, the SW USB switches to

the connected keyboard or mouse instantly, without the delay

that normally occurs while the computer recognizes a new

peripheral device. See “Host emulation (SW4 USB Plus only),”

in chapter 3, “Operation”, for more information.

Output connectors — Connect peripheral USB devices, such as

keyboards and/or mice, to these female type A USB connectors,

using cable lengths of up to 15' (4.5 m). All outputs supply the

500 mA, 5V rating as dened in USB specications.

The four outputs act as a USB hub. Inputs cannot be

routed to speciﬁc USB output connectors. All outputs

are simultaneously connected to the selected input.

On the SW USB Plus, output ports 3 and 4 can be used

for host emulation. See “Host emulation (SW4 USB

Plus only),” in chapter 3, “Operation”, for more

information.

Power connector — Attach the provided external 12 VDC power

supply to this two-pole, 3.5 mm captive screw connector.

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Extron-electronic RSB 126 User Manual Page 13

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