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Section 6. Repair
6-11
Pin 8
MODEL 15P SERIAL PORT CONNECTIONS
There are two typical configurations for the Model 15P connection to a computer serial port.
1. Using a DB-9 connector:
Model 15P on TB-2
DB-9 on computer
Rx Data
Pin 15
Pin 3
Tx Data
Signal Gnd
Pin 16
Pin 5
Signal Gnd
Tx Data
Pin 17
Pin 2
Rx Data
Pin 4
Jumper
Connects DSR to DTR*
Pin 6
Pin 7
Jumper
Connects RTS to CTS*
2. Using a DB-25 connector:
Model 15P on TB-2
DB-25 on computer
Rx Data
Pin 15
Pin 2
Tx D
Signal Gnd
Pin 16
Pin 7
Signal
Tx Data
Pin 17
Pin 3
Rx D
Pin 4
Jumper
Connects RTS to CT
Pin 5
Pin 6
Jumper
Connects DSR to DT
Pin 20
ata
Gnd
ata
S*
R*
* The DSR/DTR and RTS/CTS jumpers are not strictly necessary, but they provide an easy
way to get the computer or terminal to work if it provides no easy way to turn off hardware
handshaking.
When interfacing the Model 15P to a CRT terminal instead of a PC, the connector is
typically a male 25-pin D-connector instead of a female connector. This information is
correct for most computers. Consult your computer manual for more details on its serial port.