Appendix
Printer Interface Technical Information
RS-232 Interface
Signal Levels
For all
|
|
Pin No. | Description |
1 | Chassis Ground |
2 | TXD (Transmit Data) output from the printer |
3 | RXD (Receive Data) input to the printer |
4 | RTS (Request To Send) output from the printer |
5 | CTS (Clear To Send) input to the printer |
6 | DSR (Data Set Ready) input to the printer |
7 | Signal Ground |
20 | DTR (Data Terminal Ready) output from the printer |
NOTE: Pin #’s
Data signals are defined as either MARK or SPACE, while control signals are either ACTIVE or INACTIVE. The voltage levels which represent these conditions are:
Data Signal | |
MARK or INACTIVE = | |
SPACE or ACTIVE = | +3 to +25 VDC |
Hardware Control Signal Descriptions
Request To Send (RTS) is a control signal from the printer to the host computer. RTS is always in the ACTIVE condition (positive voltage) whenever the printer is powered ON.
Clear To Send (CTS) is a control signal from the host computer to the printer. When CTS is in the ACTIVE condition (positive voltage), the Stripe printer can transmit status to the host. When CTS is in the INACTIVE condition (negative voltage), the printer will not transmit any data.
When RTS/CTS handshaking is selected via DIP Switch # 7 at the rear of the printer, the Data Terminal Ready (DTR) Control Signal output from the printer controls when the host computer may send data. DTR ACTIVE (positive voltage), permits the host to send data. When the printer places DTR in the INACTIVE (negative voltage) state, the host must not send data.
NOTE: When XON/XOFF handshaking is selected, data flow is controlled by the ASCII Control Codes DC1 (XON) and DC3 (XOFF). The DTR Control lead will have no effect.
Appendix
65
