4

EA KIT160-7

RS-232/RS-422 CONNECTION

The graphics kit is shipped with an RS-232 interface as standard. The pin assignment of the plug

connector (J3) is as shown in the table on the left. The J3 has a 2.54mm grid. If the graphics kit is ordered

together with the EA OPT-RS4224 optional component, RS-422 drivers are fitted. In this case, the pin

assignment is as shown in the table on the right.

The same serial data with 5V levels and TTL logic is available at the J5 eyelet strip. These levels are

suitable for direct connection to a µC. However, if these signals are used, solder link LB5 and LB6 must

be cut or opened.

BAUD RATES

The baud rate can be set by means of the 3 DIP switches on the left. 9,600 baud

is set at the factory (DIP 3 ON). Please note that the internal data buffer only holds

24 bytes. It is therefore imperative that the RTS handshake line be queried (a level

of +10V means data can be accepted; a level of -10V means the display is busy).

The data format is fixed at 8 data bits, 1 stop bit and no parity.

WRITE PROTECTION FOR PROGRAMMED MACROS

You can use DIP switch 6 to prevent the programmed macros,

images and fonts from being inadvertently overwritten.

RS-232 J3 connection

Pin Symbo In/Out

Function

1

VDD

-

+ 5V supply

2

DCD

-

StraptoDTR

3

DSR

-

StraptoDTR

4

TxD

Out

Transmit data

5

CTS

In

Clear to send

6

RxD

In

Receive data

7

RTS

Out

Request to send

8

DTR

-

See pin 2, pin 3

9

-

-

NC

10

GND

-

0V ground

RS-422 J3 connection

Pin

Symbol

Function

1

VDD

+ 5V supply

2

Data In-

Receive data

3

Data In+

Receive data

4

Data Out- Transmit data

5

Data Out+ Transmit data

6

HS In-

Handshake

7

HS In+

Handshake

8

HS Out-

Handshake

9

HS Out+

Handshake

10

GND

0V ground

Baud rates

DIP switches

Data format

8,N,1

1

2

3

ON

ON

ON

1200

ON

ON

2400

OFF

ON

ON

4800

OFF

ON

9600

OFF OFF

ON

ON

19200

OFF

ON

38400

OFF

OFF

ON

57600

OFF OFF

115200

OFF OFF OFF

Write protection

DIP

Write protection

for

EEPROM

6

ON

On

No macro progr. possible

Off

OFF

Macro progr. possible

SUPPLYVOLTAGE / EA OPT-9/35V

Inthestandardmodel,thesupplyvoltageof+5V

isfedinviascrew-typeterminalJ1.Inthecaseof

the version for 9..35V (EA OPT-9/35V), the

power is supplied via J2.

Important: It is imperative that the polarity is

correct. Polarity reversal, even for a very short

time, can cause the immediate destruction of

the entire display.

J5 ad-on

Pin Symbol In/Out

Function

1

VU

-

9..35V Supply

2

VDD

-

+ 5V Supply

3

GND

-

0V, Ground

4

TxD5

Out

Transmit Data

5

RxD5

In

Receive Data

6

RTS5

Out

Request To Send

7

CTS5

In

Clear To Send

8

RESET

In

H: Reset