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