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Operation 3-7

3.4 Rear Panel connections

The Transmitter Controller has several types of connections on the rear panel of the 

unit. The following will describe each type and what it is used for. See illustration 

3-6 for location of each connector. Refer to Section 2.4.5 illustrations 2-15, 2-16 

and 2-17 for detailed descriptions of each applicable remote control connector.

3.4.1 DB-25

There are six (three, dual vertically stacked) DB-25 female connectors on the back of 

the Transmitter Controller. PA1 thru PA5 are what is used to connect to the DB-25 

remote I/O on the back of each PA. These are pre-wired in the cabinet. 

The connector labeled I/O Port A is used for the Remote Interface and has the final 

output metering information as well as the system controls for power control and high 

voltage control. It also contains information for PA5. See illustration 2-15 on page 

2-5 for a detailed description of what each pin is used for.

3.4.2 DB-37

There are two (one, dual vertically stacked) DB-37 female connectors on the back 

of the Transmitter Controller. Port B is used for a remote monitor and has all the 

metering channels found on both PA1 and PA2 routed to this connector. 

Port C has the information from PA3 and PA4. See illustration 2-16 and 2-17 on 

page 2-6 and 2-7 respectively, for a detailed description of what each pin is used for.

3.4.3 DB-9

There is one DB-9 female connector and one DB-9 male connector (vertically 

stacked) on the back of the Transmitter Controller. The port labeled ‘Directional 

Coupler’ is used to provide a supply voltage to the temperature sensor located 

inside the connector shell attached to this port which in turn provides an internal 

cabinet temperature reading available on I/O port A. The port labeled ‘Power 

control’ is connected to the power supply located in the bottom of the cabinet. This 

port has the control signals necessary for the power supply to operate.

Illustration 3-6 Rear panel connections

1 2 ... 17 18 19 20 21 22 23 24 25 26 27 ... 37 38

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