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This printer is configured as Data Terminal Equipment (DTE). The serial data cable used to connect the printer to the host computer is one of two styles:
•9-pin to 25-pin cable – (null modem cable) must have a 9-pin “D” type (DB-9S) connector on the end that is plugged into the serial port at the computer and a
25-pin “D” type (DB-25P) connector on the other end that is plugged into the connector at the rear of the printer. Figure 36 shows the required cable connections.
DB-9S  | DB-25P  | 
Connector  | Connector  | 
to P.C.  | to Printer  | 
Figure 36
•25-pin to 25-pin cable – (null modem cable) must have a 25-pin “D” type (DB-25S) connector on the end that is plugged into the serial port at the computer and a 25-pin “D” type (DB-25P) connector on the other end that is plugged into the connector at the rear of the printer. Figure 37 shows the required cable connections.
DB-25S  | DB-25P  | 
Connector  | Connector  | 
to P.C.  | to Printer  | 
1  |    | 1  | 
2  |    | 2  | 
3  |    | 3  | 
6  |    | 4  | 
7  |    | 6  | 
8  | CTS  | 7  | 
20  |    | 20  | 
Figure 37
88  | Zebra Z4M/Z6M Printers User’s Guide |