Epson C82305, C8230 User Manual

EPSON

Serial Interface
Card

C82305*
C8230*

English
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4000152
C01-00

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NOTICE

without Seiko Epson’s express written permission is forbidden.
The contents of this manual are subject to change without notice.
All efforts have been made to ensure the accuracy of this manual. However, should any
error

S be detected. Seiko Epson would greatly appreciate being informed of them

The above notwithstanding. Seiko Epson can assume no responsibility for any errors
in this manual or their consequences.
Copyright © 1990 by- Seiko Epson Corporation. Nagano, Japan

Serial Interface

C82305 * /C82306 *

English

Schnittstellenkarte

C82305 * /C82306 *

Interface série

C82305 * /C82306*

Interface en serie

C82305 * /C82306*

Interfaccia seriale

C82305* /C82306*

Deutsch

Français

Español

Italiano

TABLE OF CONTENTS

INTRODUCTION

About this guide

SETTING THE CONDITIONS

Card layout
DIP switch and jumper settings
DIP switches
Jumpers

DATA ENTRY

Serial communication
About data entry

Handshaking protocol
SPECIFICATIONS
HARDWARE DESCRIPTION
RECOMMENDED CIRCUIT CONNECTIONS
INSTALLATION

2
3

4
4
5
5

10
13

13
13
14

17
19
21
22

INTRODUCTION

The Serial Interface Card 032305 * /C82306 * is an interface
that allows asynchronous serial data communication
between a host computer and an EPSON printer.

This interface card offers the following features:

• Data transmission that can be set at either RS-232D
or 20 mA Current Loop levels (RS-232D has been
revised from the former RS-232C. Set the signal
levels for RS-232D the same as for RS-232C.)

• Handshaking protocol using X-on/X-off or DTR flag
control

• Selectable data word structure that allows you to
choose parity (Odd, Even, or None) and word bit
settings (either 7 or 8 bit)

• Selection of baud rate settings from 75 to 19,200 BPS
(Data transmission speed is limited to 1,200 BPS
when the signal level is set to 20 mA Current Loop)

l DIP switch 1 settings that you can change even after

installation

About this guide

This guide is designed to give you detailed information
on how to install your C82305 * /C82306 * serial interface
card in a variety of EPSON printers. Installation
procedures vary slightly depending upon the printer
model that you have.

Also included are instructions on how to adjust the
settings of the C82305 * /C82306 * interface card, as well as
a general description of serial data communication.

The C82305 * /C82306 * option package contains the
following items:

C82305*
C82306* serial I/F card (1)

Optional connector lock nuts (2)

Note

When attaching the interface cable to the interface, you

may find that the screws of your interface cable do not
fit into the connector lock nuts. If this happens you will need
to replace the connector lock nuts with the optional ones
provided in this package.

3

SETTING THE CONDITIONS

The C82305 * /C82306 * interface card has two sets of
DIP (Dual In-line Package) switches, and seven jumpers.
These switches and jumpers are used for selecting
various interface operations.

Card layout

The figure below shows the layout of the C82305 * /C82306 *
card, and the locations of the DIP switches and jumpers.

Figure 1. Card layout

4

DIP switch and jumper settings

Before you install the C82305 * /C82306 * interface, you may
need to adjust the DIP switch 2 and jumper settings.
You can change the DIP switch 1 settings after you
install the interface. When making DIP switch setting
changes, it is best to use a pointed device, such as a
ball-point pen or small screwdriver.

Caution
All changes of DIP switch and jumper settings should be
made with the printer power turned off. New settings
become valid only when the printer is turned on.

DIP switches

The settings on DIP switches allow you to change

interface functions. The two sets of DIP switches on the

C82305 * /C82306* are labelled SW1 and SW2. Each set

contains a number of individual toggle-type switches

that can be set either on or off. The individual switches are

referred to by set (SW1 or SW2) and number. Therefore,

the switch in set SW1 marked by the small number 3 is

called DIP switchl-3.

5

DIP switch 1 (interface operations)

The table below contains information on switch
functions, and the factory setting of each.

Table 1. DIP switch 1

Switch

number

1-1

(Note)

l-2

l-3 Parity check 1
1-4

l-5
l-6

Function

I/F card enable/disable

Word length

check

Parity
Baud rate 1

Baud rate 2

2

ON

Enable

8 bit 7 bit ON

See

See Table 5.

OFF

Disable ON

I

Table

Factory

setting

4.

OFF
OFF

ON

OFF

Note

Some printers have a selecting switch (or function) that
allows you to select between the optional and original
interfaces. If you install the interface card in this type of
printer, you should set DIP switch l-l on the interface
card to ON and also change the setting in the printer to
select the optional interface.

6