Extron electronic RSU 126, RSF123 Wiring the Power Connector, Installation, cont’d, information

Installation, cont’d

B	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 firmware.
	N 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.
C	Contact port — If desired, connect a two- or four-button contact
	closure device to this three-pole (SW2) or five-pole (SW4),
	3.5 mm captive screw connector to enable input selection via
	contact closure.
D	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.
	N Only Extron products can be controlled via this port.
E	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

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.

CExposing 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 figure below shows how to wire the power connector.

that normally occurs while the computer recognizes a new

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

Heat

7/8”

(22 mm)

	in chapter 3, “Operation”, for more information.
F	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 defined in USB specifications.
	N 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.
	N 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.
G	Power connector — Attach the provided external 12 VDC power
	supply to this two-pole, 3.5 mm captive screw connector.

Shrink 1/8” (3 mm)

	Tie Wrap
3/16”	Orange Captive
(5 mm) Max.	Screw Connector

Power connector wiring

WThe two power cord wires must be kept separate while the power supply is plugged in. Remove power before wiring.

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.

2-8 SW USB Series • Installation SW USB Series • Installation 2-9