Oki RT322POS Instrukcja Użytkownika Pobierz pdf (Strona 53)

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12-2. RS-232C Connector

Pin No. Signal name Direction Function

1 F-GND — Frame ground

2 TXD OUT Transmission data

3 RXD IN Receive data

4 RTS OUT Same as DTR

5 N/C Not used.

6 DSR IN

1) Star Mode

Not used.

2) ESC/POS Mode

When DIP Switch 3-7 = OFF;

A) DTR communication mode

Indicates whether data receive from host is enabled or

disabled.

Space: Receive enabled

Mark: Receive disabled

(except when transmitting data by DLE EOT, and GS a)

B) X-ON/X-OFF communication mode

Status of this signal is not checked.

When DIP Switch 3-7 = ON;

This is an externally reset signal.

A space above 1 ms pulse width engages reset.

7 S-GND — Signal ground

8~19 N/C Not used.

20 DTR OUT 1) Star Mode

A) DTR communication mode

Indicates whether data receive from host is enabled

or disabled.

Space: Receive enabled

Mark: Receive disabled

B) X-ON/X-OFF communication mode

Always space, except during following conditions:

• Period between reset and communication enabled

• During self printing

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Oki RT322POS Instrukcja Użytkownika Strona 53