Table 4. DTE PORTS A - H

 

 

 

RS-232

 

 

 

Signal

 

 

 

Direction of

Pin #

Signal

Description

DTE Ports A

 

 

 

through H

2

TD

Transmit Data

Output

3

RD

Receive Data

Input

4

RTS

Request to Send

Output

5

CTS

Clear to Send

Input

6*

DSR

Data Set Ready

Input

7

SG

Signal Ground

<------>

8*

CD

Carrier Detect

Input

20

DTR

Data Term Ready

Output

14**

TD(B)

Transmit (+)

Output

15**

TD(A)

Transmit (-)

Output

16**

RD(B)

Receive (+)

Input

17**

RD(A)

Receive (-)

Input

*Pins 6 & 8 are tied together inside the 232D4SS8 and share the same input. Refer to Figure 5.

** RS-422/485 option if installed.

The 232D4SS8 has eight ports labeled "A - H". Refer to “Rear View”. Any of these ports can be manufactured to meet either RS- 232 or RS-422/485 electrical characteristics. The 232D4SS8 comes standard with four RS-232 ports and four ports that are RS-232 or RS-485 depending on the pins that you use.

RS-232 Configuration

All eight RS-232 slave ports will be wired as DTE ports. Refer to Table 4 for pin out, signal name, and signal direction information. Also, refer to Figure 5 for a simplified schematic showing the relationship between the Master port and any RS-232 port "A-H". Refer to Appendix B for cable charts.

Documentation Number 232D4SS84502 Manual

9

B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445

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B&B Electronics 232D4SS8 Request to Send Output, Clear to Send Input, Data Set Ready Input Signal Ground Carrier Detect