USER’S GUIDE
Signal Description
Signal NameIN/OUTExplanation
FG | – | Frame Ground |
SD | OUT | Send Data. |
RD | IN | Receive Data. Receives data transmitted |
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| from the computer. |
RS | OUT | Request To Send. “SPACE” level when the |
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| printer is ready to send data to the |
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| computer. |
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DR | IN | Data Set Ready. When DSR is at “SPACE” |
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| level, data can be accepted. |
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SG | – | Signal Ground |
ER | OUT | Data Terminal Ready. “MARK” level when |
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| the printer is Busy. |
