Datamax Prodigy Plus Operator's Manual page 50

Printer Cabling and Interfacing:
When the Printer receives data from any host system, it will not
properly function with an incorrectly wired cable. Proper wiring
diagrams can be found in Appendix E. Table B-1 contains a list of the
signals that if correctly wired to the host system will cause the Printer
to operate properly.
When the Printer is turned on, it will default to pre-determined
interfacing parameters. The default values are in Table B-2.
Table B-2 Printer Default Communication Parameters
Altering the switch positions of Dip Switch S1 on the back of the
Printer will configure the Printer for different applications. Appendix
B shows the switch positions and configurations supported by each
setting.
B-2
Switch Settings and Cable Interfacing
Signal
TX
RX
BUSY
Ground
Jumper
Shield
Table B-1 I/O Port Wiring
Parameter Default Value
BAUD 9600
Data Bits 8
Parity None
Stop Bits 1
Pin
2
3
20
7
4 to 5
1
Prodigy Plus