SATO M-5900RV Specifications download pdf (Page 34)

34 M5900RV

4. Interface Specifications Operation Manual

Electrical Specifications

Pin Assignments

RS232C Interface Signals

Connector

DB-25S (Female)

Cable

DB-25P (Male), 5m or less length. For cable configu-

ration, refer to Cable Requirements appropriate to the

RS232C protocol chosen.

Signal Levels

High = +5V to +12V

Low = -5V to -12V

PIN DIRECTION SIGNAL DESCRIPTION

1 Reference FG (Frame Ground)

2 To Host TD (Transmit Data) - Data from the printer to the host com-

puter. Sends X-On/X-Off characters or status data (Bi-

Directional protocol).

3 To Printer RD (Receive Data) - Data to the printer from the host com-

puter.

4 To Host RTS (Request to Send) - Used with Ready/Busy flow con-

trol to indicate an error condition. RTS is high and remains

high unless the print head is open, (in this case, RTS

would return to the high state after the print head is closed

and the printer is placed back on-line) or an error condition

occurs during printing (e.g. label out).

5 To Printer CTS (Clear to Send) - When this line is high, the printer

assumes that data is ready to be transmitted. The printer

will not receive data when this line is low. If this line is not

being used, it should be tied high (to pin 4).

6 To Printer DSR (Data Set Ready) - When this line is high, the printer

will be ready to receive data. This line must be high before

data is transmitted. If this line is not being used, it should

be tied high (to pin 20).

7 Reference SG (Signal Ground).

20 To Host DTR (Data Terminal Ready) - This signal applies to Ready/

Busy flow control. The printer is ready to receive data

when this pin is high. It goes low when the printer is off-

line, either manually or due to an error condition, and while

printing in the Single Job Buffer mode. It will also go low

when the data in the buffer reaches the Buffer Near Full

level.

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