Product manual

Option Switch Settings

JP12 (RS232 RXD FUNCTION)

JP12 selects the routing of the Received Data at J7, the serial interface connector for the

CAD/Printer port. There are three positions for this jumper:

Position A = Selects Pin 2 as RxD input (configured as null-modem connection).

Position B = Selects Pin 4 as RxD input (typical Zetron 3-wire connection).

No jumper = Selects no Received data (JP12 must be in either A or B).

JP12 (on the rear panel PCB, part number 702-9314) should be in the B position for use

with the Zetron data cable (part number 709-7208) supplied with the Model 26

equipment. The factory default position for JP12 is position B.

Option Switch Settings

The OPTION SWITCH is located on the rear panel next to CHAIN IN/OUT ports (see

Figure 6). It consists of eight individual switches that are used to set the address of the

Model 26, to select the Software Configuration Program and to set the baud rate for the

Software Configuration Program.

Figure 6: Model 26 Rear Panel Layout

In every dispatch system, each Model 26 must have a unique address. The Option Switch

is used to set this address. Switches 1 through 4 are used to set the binary address of the

Model 26. The primary Model 26 must always be address number 1 (switch 1 = On and

switches 2 through 4 = Off). Any additional Model 26s must be addressed up sequentially

(Refer to Figure 7).