User`s manual

SIERRA PRO SERIES 16

Control via 9-pin Connectors

The 9-pin connectors allow you to control the routing switcher via an external computer. On some

switcher models, the serial port can be changed internally for RS422 configuration (RS232 is

factory configuration).

Each routing switcher model has one port and it is labeled on the back panel as “RS232/422

Control” (refer also to the illustrations of back panels shown in Chapter 1):

Connection to the RS-232/422 port is made using a standard 9 pin (pin to pin) cable.

Conversion to RS-422:

To convert the RS-232 serial control to RS-422, remove top cover of router. Locate the processor

board on the rear of the front panel. The jumpers are located in approximately the center of the

processor PCB.The jumpers are labeled JP1, JP2, and JP3.

Jumper positions are as follows:

Pro Series 16 Switchers

RS-232 RS-422

1 2 3

JP1

JP2

JP3

1 2 3