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Unit 3: Interface Secifications
SATO MB2i Service Manual PN 9001145B Page 3-4
RS232C SERIAL INTERFACE
This interface is an industry standard for serially transmitting data using a wired cable. Separate
transmit and receive lines enable data to flow in both directions simultaneously. Data transmitted
using this protocol is defined in its parameters; baud/bps (speed), data bits, stop bit, parity, and
hand-shaking method. To change the parameter settings, refer to the Programming Reference
document for this product. The Programming Reference and a ready-made cable with DIN and
DB9 connectors may be acquired from SATO.
Default Parameters: DSW1-4 OFF, 19200bps, 8 data bits, 1 stop bit, no parity.
Figure 3-1, RS232 Male Connector Pin Assignments
Figure 3-2, RS232 Female Connector Pin Assignments
READY/BUSY CABLE REQUIREMENTS
DB9 DB25 HOST DIRECTION 8-PIN PRINTER
2 3 RD (Receive Data) To Host 1 TD (Transmit Data)
3 2 TD (Transmit Data) To Printer 6 RD (Receive Data)
8 5 CTS (Clear To Send) To Printer DB9-6 2 RTS (Request To Send)
5 7 SG (Signal Ground) Bi-Directional 7 SG (Signal Ground)
7 4 RTS (Request To Send) To Host 5 CTS (Clear To Send)
RS232C SPECIFICATIONS
Asynchronous ASCII Half-duplex communication, Bi-Directional Communication
Data Transmission Rate 9600, 19200, 38400, 57600, 115200 bps
Data Length 8 bit (selectable)
Stop Bit 1 bit (fixed)
Parity Bit ODD, EVEN, NONE (selectable)
Codes Used ASC II Character Codes
Control Codes STX (02h), ETX (03h), ACK (06h), NAK (15h)
Connector 8-pin mini - DIN
Cable (8-pin DIN to 9-pin host) Call 704.644.1650
Signal Levels High: +12V, -12V