RS-232 port

Installation, cont’d

Wiring for RS-232 Communication

The three-pin, 3.5 mm captive screw connector labeled “RS-232” is used for optional RS-232 communication between the SW USB and a PC or control system. The control system plugged into this port can issue commands to the SW USB, which can pass the commands through to an Extron A/V switcher that is plugged into the RS-232 Pass Thru port.

NYour RS-232 computer or control system should not be one of the host devices that are being switched. Use a separate computer for RS-232 control.

To connect your computer or control system to the RS-232 connector, use a male 9-pin, D-to-bare-wire RS-232 cable. One end of the UC cable is terminated with a female 9-pin D connector, and the other end is unterminated.

1. Wire the unterminated end of the RS-232 cable to one of the provided three-pin captive screw plugs.

2. Plug the wired three-pole connector into the RS-232 receptacle on the switcher’s rear panel.

The figure below shows how to wire this connector for RS-232.

RS-232								SW USB Switcher
								Rear Ranel
								RS-232 Port
TxRx								RS-232 Port

Connect a ground wire between the switcher and the computer or control system.

Ground

(Rx) Receive Pin to Transmit (Tx) Pin 3 (Tx) Transmit Pin to Receive (Rx) Pin 2

The pinout for the host PC to the SW USB is shown below:

Host PC Pin	Switcher Pin

2 (Rx)	TX

3 (Tx)	Rx

5 (Gnd)	_

RS-232 Pass Thru port

The RS-232 Pass Thru port allows you to loop through the Transmit line of the RS-232 control port from the SW USB. This enables you to send SIS commands to another Extron A/V switcher. See chapter 4, “SIS Configuration and Control”, for explanations of these SIS commands.

NOnly Extron products can be controlled via this port.

The SW USB sends SIS commands to the A/V switcher in the following loop-through modes:

•Loop 1 mode (default) — In this mode, SIS commands can be issued to the SW USB and/or passed through to a connected A/V switcher via an RS-232 interface (such as DataViewer or HyperTerminal) on your computer.

To enable Loop 1 mode, issue the E1LOOP}command.

•Loop 0 mode — In this mode, the input selection SIS command X!! can be issued to the SW USB via contact closure, the SW USB front panel buttons, or the RS-232 interface. The SW USB subsequently passes the command through to a connected A/V switcher.

To enable Loop 0 mode, issue the E0LOOP}command.

N In Loop 0 mode, you can still issue commands to the

SW USB using the front panel buttons, RS-232, or

contact closure in both loop modes. The loop mode

selection affects only commands coming through the

If you use cable that has a drain wire, tie the drain wire to ground at both ends.

9 pin HD

RS-232 Pass Thru port.

The diagram on the next page shows how to wire the SW USB’s

Connector

To Computer or

Control System

RS-232 Port

RS-232 connector pin assignments

RS-232 Pass Thru port for use with an Extron A/V switcher. (The SW USB’s RS-232 Pass Thru port does not have a receive pin; therefore, it does not receive responses from the connected A/V switcher.)

2-10 SW USB Series • Installation

SW USB Series • Installation 2-11

SW USB Series, RSB 126, RSU 126, RSB129, RSF123 specifications

Extron Electronic is a well-known brand in the AV industry, renowned for its high-quality signal distribution, control systems, and mounting solutions. Among its impressive range of products, the RSB129, RSF123, RSU 126, RSB 126, and SW USB Series stand out due to their sophisticated features and technologies.

The RSB129 is a robust rack shelf designed to accommodate a variety of equipment, such as routers, switches, and other AV devices. This shelf can support up to 300 pounds, making it an excellent choice for heavy-duty applications. It also features adjustable mounting points that allow for flexible placement of devices, ensuring an organized and efficient setup.

The RSF123, on the other hand, is a flexible rack frame solution that provides a reliable mounting option for intermediate size equipment. This 2U rack frame is built to hold devices securely, while its front ventilation design aids in maintaining optimal temperature levels. The RSF123 is particularly popular for those looking to streamline their installations with a clean and professional aesthetic.

The RSU 126 is another versatile rack mount solution that focuses on aesthetic appeal while providing functionality. Designed for environments where aesthetics matter, the RSU 126 features a smooth, sleek design that integrates seamlessly into office and conference room settings. Its compact 2U size makes it suitable for various AV applications, while its durable build ensures long-lasting use.

The RSB 126 is similar in nature to the RSB129 but is crafted for smaller setups. This 1U rack shelf is ideal for less intensive applications but still boasts impressive weight support. It features a front lip that prevents equipment from sliding off, ensuring that devices are kept securely in place. The RSB 126 is perfect for studios, server rooms, or any location requiring a compact yet sturdy shelf.

Finally, the SW USB Series is a suite of USB products designed to streamline connectivity in modern AV installations. These USB devices offer flexible options for extending USB signals over long distances without loss of quality. They support a variety of USB protocols, making them compatible with numerous devices, from cameras to computers. The SW USB Series aims to simplify complex installations, ensuring a reliable connection in various environments.

In summary, Extron's RSB129, RSF123, RSU 126, RSB 126, and SW USB Series products cater to a variety of AV installation needs, combining durability, functionality, and aesthetics. Whether for heavy-duty rack shelving or streamlined USB connectivity, these products are designed to enhance any AV setup.