Epson C82307, C823088 User Manual

EPSON

32KB
Serial

Interface Card

C82307 *

C823088 *

English
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4000273
C01-00

FCC

COMPLIANCE STATEMENT

FOR

This equipment has been tested and found to comply with the limits for a Class B digital

AMERICAN

device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide
reasonable protection against harmful interference in a residential installation. This
equipment generates, uses, and can radiate radio frequency energy and, if not installed
and used in accordance with the instructions, may cause harmful interference to radio
communications However. there is no guarantee that interference will not occur in a
particular installation. If this equipment does cause harmful interference to radio or
television reception, which can be determined by turning the equipment off and on, the
user is encouraged to try to correct the interference by one or more of the following

measures:

—

Reorient or relocate the receiving antenna

—

Increase the separation between the equipment and receiver.

—

Connect the equipment into an outlet on a circuit different from that to which the
receiver is connected.

—

Consult the dealer or an experienced radio/TV technician for help

This device complies with Part 15 of the FCC Rules. Operation is subject to the following
two conditions:

(1)

this device may not cause harmful interference, and

(2)

this device must accept any interference received,

including interference that may cause undesired operation.

This digital apparatus does not exceed the Class B limits for radio noise emissions from

digital

apparatus as set out in the radio interference regulations of the Canadian

Department of Communications

Le présent appareil numérique n´émet
applicables aux appareils numériques
brouillage radioélectrique édicté

The connection of a non-shielded printer interface cable to this printer will invalidate
the FCC Certification of this device and may cause interference levels which exceed the
limits established by the FCC for this equipment If this equipment has more than one

interface

connector. do not leave cables connected to unused interfaces.

Seiko Epson Corporation shall not be liable against any damages or problems arising
from the use of any options or any consumable products other than those designated
as Original Epson Products or Epson Approved Products by Seiko Epson Corporation

All rights reserved. Reproduction of any part of this manual in any form whatsoever
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
errors 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

FOR CANADIAN

pas de bruits radioélectriques dépassant les limites

de Class B prescrites dans le règlement sur le

par le Ministére des Communications du Canada.

WARNING

NOTICE

by Seiko Epson Corporation, Nagano. Japan

USERS

USERS

32KB Serial Interface Card

C82307* / C82308*

English

32-KB-Schnittstellenkarte

C82307* / C82308*

Carte d´Interface série 32Ko

C82307* / C82308*

Módulo de interface en serie de 32KB

C82307* / C82308*

Scheda dell´interfaccia seriale da 32KB

C82307* / C82308*

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

SELF TEST

Loopback mode

Line-monitor mode
SPECIFICATIONS
HARDWARE DESCRIPTION
CIRCUIT DIAGRAMS
INSTALLATION

2
3

4
4
5
5

14
16

16
16
17

21
21
22

23
25
28
31

INTRODUCTION

The Serial Interface Card C82307 * /C82308 * is an interface

that

allows asynchronous serial

between a host computer and an EPSON printer.
This interface card offers the following features:

A 32K byte buffer

•

other uses while your

Two self-test functions

•

problems

Data transmission that can be set at either RS-232D,

•
RS-422A,

has been revised from the former RS-232C.
signal levels for RS-232D the same as for RS-232C.)

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

•

control

Selectable

•

choose
word bit settings (either 7 or 8 bit)

Selection of

•

(Data transmission speed is limited to 19,200
when interface is set to either RS-232D or 20-mA
Current-Loop.)

DIP-switch 1 settings

•

installation

or 20-mA Current-Loop levels (RS-232D

data

parity

that

word

(Odd,

baud-rate

structure that

Even,

that

data

communication

frees up your computer for

printer

continues to print

that

can help solve interface

Set

the

allows you to

None, or Ignore) and

settings from 75 to 38,400

BPS

you can change even

BPS

after

About

this guide

This guide is designed to give you detailed information
on how to install

in a

card

variety

procedures

your

C82307 * /C82308 * serial interface

of EPSON printers. Installation

vary

slightly depending upon the printer

model that you have.

Also included are instructions on how to adjust the
settings of the C82307 * /C82308 * interface card, as well as
a general description of serial

data

communication.

The C82307 * /C82308 * option package contains the
following items:

C82307*
C82308*

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

The C82307 * /C82308 * interface card has three sets of
DIP (Dual In-line Package) switches, and eight jumpers.DIP (Dual In-line Package) switches, and eight jumpers.
These switches and jumpers are used for selectingThese switches and jumpers are used for selecting
various interface operations.various interface operations.

CONDITIONS

Card layoutCard layout

The figure below shows the layout of the
card, and the locations of the DIP switches and jumpers.

card, and the locations of the DIP switches and jumpers.

Figure

1. Card layout

C82307 * KS2308

*

4

DIP switch and jumper settings

Before you install the C82307* /C82308* interface, you
may need to adjust the DIP-switch 2, DIP-switch 3, and
jumper settings. You can change the DIP-switch 1
settings
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
become valid only when the printer is turned on.

after

you install the interface. When making

printer

power turned off. New settings

DIP switches

The settings on DIP switches allow you to change
interface functions. The three sets of DIP switches on
the C82307* /C82308* are labelled SWl, SW2, and

Each set contains a number of individual toggle-

SW3.

type switches
individual switches are referred to by set (SW1, SW2, or

and number. Therefore, the switch in set SW1

SW3)

marked by the small number 3 is called DIP switchl-3.

that

can be set either on or off. The

5

DIP switch
The tables below contain information on switch

functions, and the

Table 1. DIP switch 1

Note

Some
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 1-l on the interface

card

select the optional interface.

1

(interface operations)

factory

setting of each.

printers

to ON and also change the setting in the

have a selecting switch (or function)

printer

that

to

6

Data word structure

The

data

word structure is also

through DIP-switch settings
structure for serial

1

start

bit +7 or 8

bit (selectable) +l or more stop bits.

The table below shows the possible word structure
combinations.

Table 2. Word structure

You

can select the parity check method with DIP-switch

settings

Table

(See

3. Parity check

Table

data is:

data

3).

operator

(See

Table

bits (selectable) + 1

selectable

1).

The word

parity

7

DIP

switch 2

The tables below contain information on switch

functions, and the factory setting of each.

Table 4. DIP switch 2

(interface operations)

8

Baud rate

In serial

form of bits. These

a single
Per Second) rate, or speed at which these bits are
transmitted, can be selected using a combination
switch settings.

Note

In either RS-232D or Current-Loop mode, accurate
transfer cannot be guaranteed at a

19,200

Table 5. Baud rate selection

selection

data

communication,

data

bits go out one at a time along

path,

and in a specified order. The

BPS.

data

is transmitted in the

BPS (Bits

baud rate

exceeding

of DIP-

data

9

Handshaking selection and Interface selection

The table below shows the relation between
handshaking selection and interface selection.

Table 6. Handshaking and interface

Note

In

RS-422A mode, selecting DTR handshaking outputs

•

the DTR flag through the DTR pin (No. 20); selecting

X-on/X-off handshaking, fixes the value of the DTR

• The signal is always in a fixed, flag reset state. Signal

polarity can be inverted with DIP switch

3-4.

10

Table 7. Handshaking

Table 8. Interface selection

protocol

selection

11

DIP

switch

3 (Interface operation)

The tables below contain information on switch
functions, and the factory setting of each.

Table 9. DIP switch 3

12

Note

Buffer full recovery timing (DIP switch

•

3-2

and

and DTR flag set/X-off transmit timing (DIP switch
3-6)

selections are enabled only when buffer operation

is enabled (DIP switch

3-1 is OFF). If

SW3-1 is ON,

buffer full recovery timing is set to 32 bytes and DTR

flag set/X-off transmit timing is set to 16 bytes.

• DSR/DCD
RS-232D

signals (DIP switch

is

selected.

3-5)

are enabled when

3-3)

Buffer full

recovery

timing

When the available space for bytes in the print buffer
drops to 512 or 16 bytes,
printer prints the

data in

data

entry is disabled. As the

the buffer, the vacant area for

bytes increases. When this vacant area reaches one of the
four values listed in the table below,

is

resumed. These settings are selectable by using the

data

communication

DIP switches.

Table 10. Buffer full

Vacant area for bytes

in

the print buffer

768
1024
2048
4096

recovery

timing

DIP switch

SW

3-2
OFF
OFF

ON
ON ON

SW 3-3

OFF

ON

OFF

13

Jumpers

The jumper is a small terminal used
disconnecting a circuit. The jumper is on when the
jumper plug covers both wires of the terminal. Jumper
settings can be changed by either attaching or removing
the rectangular jumper plug. If the jumper is to be

turned off, connect it to just one of the two terminal
pins as shown in the figure below. By doing this, you
can avoid losing the unused jumper plug.

2.

Jumpers

Figure

for

connecting or

14

Table 11. Jumper settings

Note

If the host computer is not equipped with a power

•

supply

for

the Current-Loop interface, jumpers Jl, J2,

and J3 must be connected for communications via the

Current-Loop interface.

When Current-Loop is selected,

•

circuit diagrams to determine the correct current
source and current

• J5, J6, and J7 jumpers

you should not change these settings.

return.

are

see

the section

connected at the factory;

on

15

DATA

ENTRY

This section gives a brief description of serial
communication conditions and handshaking protocols
supported by the C82307* /C82308* interface card.

Serial data

The C82307* /C82308* interface allows you to select
either RS-232D, RS-422A, or 20-mA Current-Loop signal
levels for

This interface card also provides for either DTR (Data
Terminal Ready) or X-on/X-off handshaking protocol.

About

To accommodate
interface card is equipped with a buffer
stores

this buffer becomes full, any additional transmitted
cannot be accepted and is discarded. To prevent such
data

loss, special handshaking protocols are provided to

regulate the flow of
available on the C82307* /C82308* interface card are

DTR

To enable

selected, DSR and DCD must be held at the positive

EIA RS-232D

OFF.

When DIP switch

DCD

all received data will be ignored by the interface card.

communications

data

communication.

data entry

data

entry, the C82307* /C82308*

data

before transferring it to the

data

transmission. The two protocols

and X-on/X-off.

data

entry to the buffer while RS-232D

level (SPACE) or DIP switch

is

set to the negative EIA RS-232D level (MARK),

3-5 is

ON and either DSR or

that

temporarily

printer.

3-5

data

When

data

is

must be

Note

When a
framing or overrun

and data is either ignored or an asterisk( * ) is printed instead.

parity error

occurs

errors

(if

parity check is enabled),

are detected in the

16

data

received,

Handshaking

protocol

X-on/X-off Protocol

X-on/X-off protocol is a system in which the

transmits a code to the computer to indicate

cannot accept more

once again ready. This protocol can be performed under
either RS-232D, RS-422A, or 20-mA Current-Loop signal
levels.

The C82307* /C82308* interface card sends an X-on

(11H) code when it

(13H) when it is busy. The X-on/X-off signals may be

transmitted from the TXD terminal (pin No. 2) at

RS-232D

terminals (pin No. 9,
through the TTY-TXD terminal (pin No.
Current-Loop signal levels.

After the X-on flag has been set,
up to the maximum capacity of the buffer.

•

•

signal levels, through the SDA and SDB

Transmit timing of the

The

X-off

signal is

for bytes in the buffer drops to flag set level.

Data transfer after

Data can be sent to the
signal is transmitted as long as sufficient room for
data

remains in the buffer. However, if the

transmitted
buffer, it will be discarded. The X-off
be

transmitted

capacity is actually 0 bytes. At

and "/"

(08H)

printer.

data,

and a second code when it

is

ready to receive

10) at

RS-422A signal levels, or

data

can be accepted

X-off

transmitted

X-off

data

exceeds the vacant

again when the remaining buffer

character

signal

when the vacant area

signal

printer

even

(2FH) will be sent to the

that

printer

that

it

data,

and an

17)

at 20-mA

after

the

area

in the

character

time, a BS code

X-off

X-off

will

is

17

• Transmit timing of the X-on signal

The X-on signal is

transmitted

when the power is first

turned on, and when the vacant area in the buffer
greater

than

the preset value of the buffer recovery

timing. Refer to Table 12 for information on flag
set/reset

Figure

3.

X-on/X-off

conditions.

timing

is

POWER ON

DTR

X-ON

protocol

X-OFF X-OFF

Buffer

capacity: 512

or 16 bytes

Buffer

capacity

0 byte

X-ON

Buffer

capacity
specified with

DIP

switches

3-2

and

3-3.

This interface card also provides for DTR handshaking
protocol using either RS-232D, RS-422A, or Current-
Loop signal levels.

Under this system, when the

enters the SPACE state, meaning that

DTR

enabled. When the
that

of printing, the buffer gradually fills up. Once the

vacant

area for transmitted

rate

the DTR sets the status flag to prohibit
entry. This flag is output through the DTR (pin No.

printer is

turned on the

data

of

data

reception is greater than

bytes drops to flag set level,

further data

entry

20)
under RS-232D signal levels, through the TRA and TRB
(pin No. 11,
the TTY-TXD (pin No.

13)

under RS-422A signal levels, and through

17)

under Current-Loop levels.

18

is

With the
the vacant
printer continues to
bytes reaches the preset recovery value
the flag is reset and

Buffer

status

flag set and data reception prohibited,

area

of the buffer gradually increases as the

print.

When the vacant area for

data

entry is again enabled.

Operation Disabled

(see

Table 12),

Under this condition, the flag is output from the DTR
(pin No.

TRB

the TTY-TXD (pin No.

20)

in

the case of RS-232D, from the TRA and

(pin No. 11,

13) in

the case of RS-422A, and from

17)

in

the case of Current Loop.

When DIP switch 3-l is ON (buffer is disabled), flag set
timing is set to 16 bytes and flag reset timing is set to 32
bytes.

Table 12.

Flag is
(not ready to
accept data)

Flag is
(ready to
accept data)

Flag set/reset

set

reset

conditions

DTR Handshaking

TRA-TRB,

TRA:
TRB:

Current

TRA-TRB

TRA:
TRB:

Current

negative EIA

negative EIA

inverted

noninverted

Loop:

positive EIA

positive EIA

inverted

noninverted

Loop:

RS-232D:

level

RS-422A:
level

20-mA

impedance (Current

RS-232D:

level

RS-422A:

level

20-mA

impedance (Current

low

on)

high

off)

X-on/X-off handshaking

Transmitting
character

Transmitting
character

X-off

X-on

19

Flag

set timing is selectable with DIP switch

flag reset timing is selectable with DIP switches
3-3.

Printer status error
The flag is set immediately, regardless of the remaining

buffer capacity, if the

printer

detects an error.

3-6,

and

3-2

and

20

SELF

TEST

Two self-test modes can be selected by DIP switches
and

3-8.

power to the

To select a self-test mode, first turn off the

printer

and then change the DIP-switch

3-7

setting. When the power is turned back on, the new
settings automatically go into effect. To exit from the
self test, turn off power and reset the DIP switches.

Table 13. Self-test modes

SW 3-7

ON
ON

Loopback

mode

SW 3-8

OFF

ON

Loopback

Line

Mode

monitor

Turning the power on during loopback mode causes the
interface card to first check the RAM, and then print

the RAM capacity and DIP-switch settings. The interface
then sends the

character

codes 30H to 39H, followed by a

line feed command (0AH), to the printer eight times.

See

Table 14. for the terminal pin connections necessary

with your selected interface type.

Table

14. Terminal pin connections

Interface
selection

RS-232D
RS-422A

Current

Pin No. 2 (TXD) ........................ Pin

Pin No. 9 (SDA) ......................... Pin No. 16 (RDA)

Pin No. 10 (SDB) ............................. Pin No. 18 (RDB)

Loop

Pin No.
Pin No.

l In

is

ON, J2-A is ON, and J3 is ON

Transmitting terminal pin/

Receiving terminal pin

17 (TTY-TXD) .......................

24 (TTY-TXD

this case, the jumper must be

Return)

............................... Pin

NO.

3 (RXD)

Pin No.

25 (TTY-RXD)

(TTY-RXD Return)

set

as follows: J1-A

No.

23

21

Line-monitor

During this test, data on the RS-232D line, RS-422A
line, or Current-Loop line is printed in hexadecimal
code. The only difference between normal operation and
this mode is
form.

that

mode

all

data is

converted into hexadecimal

22

SPECIFICATIONS

1.

Synchronization: Asynchronous

2.

Baud Rate: RS-232D: 75, 110, 134.5, 150, 200, 300,

3.

Word length:

Start bit: 1 bit
Data bit: 7 or 8 bits (selectable)
Parity bit: Odd, even, none, or ignore (selectable)
Stop bit:

Input signal polarity:

4.

1)

RS-232D:

MARK = logic "l" ( - 3 to - 25V)
SPACE = logic "0" ( + 3 to + 25V)

2)

RS-422A:

MARK = logic "1"

SPACE = logic "0"

3)

Current loop:

MARK = logic "1" (Current on)

SPACE = logic "0" (Current

600, 1,200, 1,800, 2,400, 4,800,

or 19,200

9,600,

RS-422A: 75, 110, 134.5, 150, 200, 300,

600, 1,200, 1,800, 2,400, 4,800,

9,600, 19,200,

(selectable)

Current Loop: 75, 110, 134.5, 150, 200,

300, 600, 1,200, 1,800, 2,400,
4,800, 9,600,

(selectable)

bit or more

1

The RDA is negative
with respect to the RDB.

The RDB is positive (+0.2 V to +6 V)
with respect to the RDB.

Inverted RDB: Noninverted

RDA:

BPS

(selectable)

or 38,400

or 19,200

(-0.2 V

off)

BPS

BPS

to -6 V)

23

5. Handshaking

Table 15. Handshaking

Using

protocol

RS-232D

RS-422A

Current

The signal at pin No. 20
as follows;
MARK-data
disabled
SPACE-data
enabled

(Signal

polarity can be

inverted by DIP-switch

setting.)
The signal at pin No. 11

with respect to pin No. 13
is:
MARK-data
disabled

SPACE-data
enabled
(Signal polarity can be disabled

inverted by DIP switch

setting.)

Loop The impedance between

pin No. 17 and pin No. 24

is

as follows;

LOW (MARK)—data

transfer disabled
HIGH

(SPACE)-data
transfer enabled enabled
(Signal

polarity can be

inverted by DIP-switch disabled
setting.)

DTR

transfer follows;

transfer enabled

transfer controlled as follows:

transfer

Using X-on/X-off

protocol

Data transmitted from pin

is

No. 2 is controlled as

X-on

(11H)—data transfer

X-off

(13H)—data transfer

disabled

Data transmitted by the
differential voltage of pin
No. 9 to pin No. 10

X-on

(11H)—data transfer

enabled
X-off

(13H)—data transfer

Data transmitted by the
change of the impedance

between pin No. 17 and
pin No. 24 is controlled as
follows;
X-on

(11H)—data transfer

X-off

(13H)—data transfer

is

24

HARDWARE DESCRIPTION

1. I/F

board

connector: EIA

female connector.

For

signal description and pin assignment, refer to

2.

the table below:

Table

16.

Signal Description and

standard

Pin

25-pin

Assignment

D-SUB

25

26

Note

The column heading “Direction” refers to the direction of
signal flow as viewed from the

printer.

27

CIRCUIT

DIAGRAMS

RS-232D

Figure 4.

TXD

DTR

Figure

Transmitter/Receiver

Transmitter Circuit Diagram

l/3 MC145407

l/3 MC145407

5. Receiver Circuit Diagram

1/3

MC145407

RXD

Circuit Diagrams

From

From

To

TXD

DTR

RXD

28

RS-422A

Figure

Figure

Transmitter/Receiver

6. Transmitter Circuit Diagram

7. Receiver Circuit Diagram

Circuit Diagrams

29

Current-Loop

Figure

8. Transmitter Circuit Diagram

Figure

9. Receiver Circuit Diagram

Transmitter/Receiver

Circuit Diagrams

Note

Set

Jumpers J1, J2, and J3 referring these diagrams.

30

INSTALLATION

The C82307* /C82308* interface card is designed to be
installed inside the printer. Installation or removal of the
interface card is easy, and requires only a screwdriver.

The following section gives you detailed information on
how to install your interface card in a
EPSON printers.

Caution

• Turn off the power to the printer

before installing the interface card. Make sure
power and interface cables are removed.

Avoid touching the printer’s circuit

•

many of these components are sensitive to
electric charges that may build up on your body.

First, adjust DIP switches and jumpers settings, as

1.

necessary.
If the screws don’t fit

need to replace the connector lock nuts with the
optional ones provided in this package.

Note
The original C82307* lock nuts are imperial standard

(inch), and the C82308* lock nuts are metric.

your

interface cable, you will

variety

and

the computer

board

contacts, as

of

static

that

all

31

2.

Fit

both sides of this interface card into the guides

inside the compartment.

Insert this interface card until the interface pins mate

3.

with the connector inside your

4. Secure the interface with the two screws.

printer.

32

EPSON OVERSEAS MARKETING LOCATIONS

EPSON AMERICA, INC.
2780 Lomlta Blvd.,
Torrance. Calif. 90505. U.S.A
Phone: [phone]

Fax: [phone]

EPSON UK LTD.
Campus 100, Maylands Avenue.
Hemel Hempstead, Herts,
HP2 7EZ, U.K.
Phone: [phone]
Telex: 5162467

EPSON AUSTRALIA PTY. LTD.
Unit 3, 17 Rodborough Road,
Frenchs Forest. NSW 2086 Australia
Phone: [phone]
Fax: [phone]

EPSON HONG KONG LTD.
25/F, Harbour Centre.
25 Harbour Road Wanchai,
Hong Kong
Phone: [phone]
Telex: 65542

EPSON ITALIA S.p.A.
V, le F, lli Casiraghi, 427 20099
SESTO S, GIOVANNI MI, Italy
Phone: [phone]
Fax: [phone]

SEIKO EPSON CORPORATION
(Hirooka Office)
80 Harashinden, Hirooka
Shiojiri-shi, Nagano-ken
399-07 Japan
Phone: [phone]

EPSON DEUTSCHLAND GmbH
Zülpicher Straße, 4000 Düsseldorf 11
F.R. Germany
Phone: [phone]
Telex: 8584786

EPSON FRANCE S. A.
68 bis, rue Marjolin 92300,
Levallois-Perret, France
Phone: [phone]
Telex: 610657

EPSON SINGAPORE PTE. LTD.
No. 1 Raffles Place #26-00
OUB Centre, Singapore 0104
Phone: [phone]
Fax: [phone]

EPSON ELECTRONICS TRADING LTD.
(TAIWAN BRANCH)

10F, No. 287 Nanking E. Road, Sec. 3,
Taipei, Taiwan, R.O.C.
Phone: [phone]
Fax: [phone]

EPSON IBERICA, S.A.
Paris, 152, 08036 Barcelona Spain
Phone: [phone]
Fax: [phone]

1990 May