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Serial port pin assignments, B-8 specifications – Epson 10020 User Manual

Page 152

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Serial Port Pin Assignments

Pin no.

Signal name

1

NC

2

TX

3

RX

4

RTS

5

CTS

6

DSR

7

GND

8

DCD

9-19

NC

20

DTR

21

NC

22

RI

23-25 NC

Direction Description

No connection

O

Transmitted data

I

O

Received data

Request to send

I

Clear to send

I

Data set ready

Signal ground

I

Data carrier detect

No connection

O

Data transmit ready

No connection

I

Ring indicator

No connection

Note: The following current loop functions are not supported:

Pin 9:

+Transmit current loop data

Pin 11: -Transmit current loop data

Pin 18: +Receive current loop data

Pin 25: -Receive current loop data

B-8 Specifications