Extron electronic 4LQXI, 4LDXI manual Controlling Master/Slave Switchers

Chapter 4 • Connecting Multiple Switchers

Controlling Master/Slave Switchers

When a host system is controlling a System 4xi with a switcher as a slave, a special 9-pin T-Connector cable, called a “System 4xi Slave Adapter” is necessary. Pictured below, in Figure 4-1, the connector marked “Slave” is a 9- pin male connector designed to work with the switchers described in this section.

Communications between the System 4xi (master) and the slave is done through a second port on the same connector. The adapter puts this second set of signals on the “normal” transmit/receive lines (pins 2 and 3) on the slave connector. Because Host devices tend to use pins 4 and 8 for CTS and DTR signaling, those pins must be disabled.

_________ Referred to as Rx2 and Tx2, on pins 4 and 8, these pins* must not be used for

other signals in the Host System. It may be necessary to disconnect pins 4 and 8 at the Host side.

The J1 connector connects to the J2 connector which connects to the J3 connector.

J1 Pins (System 4xi)		J2 Pins (Host)		J3 Pins (Slave Switcher)
1	- n/c	1	- n/c	1	- n/c
2	- Tx	2	- Rx	2	- Tx2 (slave to host)
3	- Rx	3	- Tx	3	- Rx2 (host to slave)
4	- Tx2	4	- *Tx2	4	- n/c
5	- Gnd	5	- Gnd	5	- Gnd
6	- n/c	6	- n/c	6	- n/c
7	- n/c	7	- n/c	7	- n/c
8	- Rx2	8	- *Rx2	8	- n/c
9	- n/c	9	- n/c	9	- n/c

Extron makes this cable (Extron part # 26-386-01), however, if you choose to make your own, the pin requirements are specified in the above table.

The System 4xi Slave Adapter is shown in the appropriate application diagrams that follow.

Slave Switcher

Figure 4-1. System 4xi Slave Adapter

Extron • System 4xi Switcher Series • User’s Manual 4-2