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Extron • System 4
xi
Switcher Series • User’s Manual
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.
Figure 4-1. System 4
xi
Slave Adapter
Slave Switcher
4-2