Table 25 COM A (RS-422/485) and COM B (RS-232)

Pin

Signal

Function

In/Out

DB-9

 

 

 

 

 

1

DCD1

COM A - Data Carrier Detect

in

1

 

 

 

 

 

2

RXD2

COM B - Receive Data

in

6

 

 

 

 

 

3

RXD1-

COM A - Receive Data (–)

in

2

 

 

 

 

 

4

TXD1+

COM A - Transmit Data (+)

out

7

 

 

 

 

 

5

TXD1-

COM A - Transmit Data (–)

out

3

 

 

 

 

 

6

RXD1+

COM A - Receive Data (+)

in

8

 

 

 

 

 

7

TXD2

COM B - Transmit Data

out

4

 

 

 

 

 

8

RI1

COM A - Ring Indicate

in

9

 

 

 

 

 

9,10

GND

Signal Ground

5

 

 

 

 

 

Table 26 COM A (RS-422/485) and COM B (RS-422/485)

Pin

Signal

Function

In/Out

DB-9

 

 

 

 

 

1

RXD2+

COM B - Receive Data (+)

in

1

 

 

 

 

 

2

RXD2-

COM B - Receive Data (–)

in

6

 

 

 

 

 

3

RXD1-

COM A - Receive Data (–)

in

2

 

 

 

 

 

4

TXD1+

COM A - Transmit Data (+)

out

7

 

 

 

 

 

5

TXD1-

COM A - Transmit Data (–)

out

3

 

 

 

 

 

6

RXD1+

COM A - Receive Data (+)

in

8

 

 

 

 

 

7

TXD2-

COM B - Transmit Data (–)

out

4

 

 

 

 

 

8

TXD2+

COM B - Transmit Data (+)

out

9

 

 

 

 

 

9,10

GND

Signal Ground

5

 

 

 

 

 

BDM-610000049 Rev G

Chapter 3: Connecting the cpuModule 41

Page 51
Image 51
IBM BDM-610000049 user manual COM a RS-422/485 and COM B RS-232, COM a RS-422/485 and COM B RS-422/485

BDM-610000049 specifications

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