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Section 6: Interface Specifications
PIN ASSIGNMENTS
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| RS232C Interface Signals |
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PIN | REFERENCE | SIGNAL DEFINITION |
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1 | Reference | FG (Frame Ground) |
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2 | To Host | TD (Transmit Data) - Data from the printer to the host computer. |
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| Sends |
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| protocols). |
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3 | To Printer | RD (Receive Data) - Data to the printer from the host computer. |
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4 | To Host | RTS (Request to Send) - Used with Ready/Busy flow control to |
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| indicate an error condition. RTS is high and remains high unless |
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| the print head is open (in this case, RTS would return to the high |
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| state after the print head is closed and the printer is placed back |
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| |
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| out, label out). |
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5 | To Printer | CTS (Clear to Send) - When this line is high, the printer assumes |
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| that data is ready to be transmitted. The printer will not receive |
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| data when this line is low. If this line is not being used, it should |
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| be tied high (to pin 4). |
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6 | To Printer | DSR (Data Set Ready) - When this line is high, the printer will be |
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| ready to receive data. This line must be high before data is |
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| transmitted. If this line is not being used, it should be tied high (to |
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| pin 20). |
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7 | Reference | SG (Signal Ground) |
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20 | To Host | DTR (Data Terminal Ready) - This signal applies to Ready/Busy |
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| flow control. The printer is ready to receive data when this pin is |
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| high. It goes low when the printer is |
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| to an error condition, and while printing in the Single Job Buffer |
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| mode. It will also go low when the data in the buffer reaches the |
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| Buffer Near Full level. |
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Page |
| PANDUIT TDP4*H |