12.2 RS232C Interface

 

 

 

Table 12.5 Definitions of Signal Lines

 

 

 

 

 

 

 

 

 

 

 

Signal

 

 

 

 

Pin Nos. on the

 

 

names and

Voltage levels

Description

I/O device side

 

 

pin Nos.on

 

 

 

 

 

 

 

the host

 

 

 

 

 

 

 

side

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

(DSUB25P)

'0'-off

 

'1'-on

 

TERMINAL-25P

 

 

 

(*1)

 

(*1)

 

 

 

 

 

 

 

 

 

 

 

 

SD: 2

+8 V

 

-8 V

GP transmitting data signals

3

 

 

 

 

 

 

 

 

 

 

RD: 3

+8 V

 

-8 V

GP receiving data signals

2

 

 

 

 

 

 

 

 

 

 

RS: 4

-8 V

 

+8 V

Transmission request signal

5

 

 

 

 

 

 

when the GP transmits the data

 

 

 

 

 

 

 

 

 

 

 

RS: 4

-8 V

 

+8 V

Transmission request signal

5

 

 

 

 

 

 

 

 

 

 

CS: 5

-8 V

 

+8 V

Request to transmit when the

4

 

 

 

 

 

 

I/O device sends out the data

 

 

 

 

 

 

 

 

 

 

 

ER: 20

-8 V

 

+8 V

Status signal to indicate

6

 

 

 

 

 

 

whether or not the host is

 

 

 

 

 

 

 

ready for operation

 

 

 

 

 

 

 

 

 

 

 

DR: 6

-8 V

 

+8 V

Status signal to indicate

20

 

 

 

 

 

 

whether or not the I/O device

 

 

 

 

 

 

 

is ready for operation

 

 

 

 

 

 

 

 

 

 

 

CD: 8

-8 V

 

+8 V

Indicates that the I/O device

5-8(*2)

 

 

 

 

 

 

receives the signal from the

 

 

 

 

 

 

 

connected system normally

 

 

 

 

 

 

 

 

 

 

 

ST1:24

+8 V

 

-8 V

Reception timing for the I/O

24

 

 

 

 

 

 

device to be supplied with the

 

 

 

 

 

 

 

data from the GP

 

 

 

 

 

 

 

 

 

 

 

ST2:15

+8 V

 

-8 V

Transmission timing for the

15

 

 

 

 

 

 

I/O device to supply the GP

 

 

 

 

 

 

 

host with the data

 

 

 

 

 

 

 

 

 

 

 

RT: 17

+8 V

 

-8 V

Transmission timing for the

17

 

 

 

 

 

 

I/O device to supply the GP

 

 

 

 

 

 

 

host with the data

 

 

 

 

 

 

 

 

 

 

 

SG: 7

--

 

--

Used as a signal return line.

7

 

 

 

 

 

 

 

 

*1

Indicates the data signal logic or ON/OFF of the control line.

*2

Indicates the pin numbers short-circuited on the TERMINAL side connector.

149

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Fujitsu M600R, M200R, GranPower7000 (GP 7000F), M400R, M400A manual 149, 12.2 RS232C Interface, Definitions of Signal Lines
Page 182 Page 184

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