RFI Emission OS-214plus User Manual download pdf (Page 30)

3.Interface Specifications

Serial

For OS-204/214/314, the RS232 connector on the printer side is a

female, DB-9.

Pin Direction Definition

1 In DSR

2 In RxData

3 Out TxData

5 - Ground

6 Out DTR

7 Out RTS

8 In CTS

9 Out +5V

For OS-203, the RS232 connector is Mini Dim 6P.

Note :

Pin 9 on OS-204/214/314 and pin 1 on OS-203 are reserved for

KDU(keyboard device unit), therefore do not connect these pins if

you are using a general host like a PC.

Connection with host:

Host 25S Printer 9P Host 9S Printer 9P

(PC or compatible) (PC or compatible)

DTR 20 …… 1 DSR DTR 4 …… 1 DSR

DSR 6 …… 6 DTR DSR 6 …… 6 DTR

TX 2 …… 2 RX TX 3 …… 2 RX

RX 3 …… 3 TX RX 2 …… 3 TX

CTS 5 …… 7 RTS CTS 8 …… 7 RTS

RTS 4 …… 8 CTR RTS 7 …… 8 CTS

GND 7 …… 5 GND GND 5 …… 5 GND

Alternatively you can just connect the 3 wires in the following way.

Host 25S Printer 9P Host 9S Printer 9P

(PC or compatible) (PC or compatible)

TX 2 …… 2 RX TX 3 …… 2 RX

RX 3 …… 3 TX RX 2 …… 3 TX

GND 7 …… 5 GND GND 5 …… 5 GND

pin 4 pin 4

pin 5 pin 6

pin 6 pin 7

pin 20 pin 8

1 2 ... 25 26 27 28 29 30 31 32 33 34 35 36

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RFI Emission OS-214plus User Manual Page 30