Electro Industries SM1-16 Manuel d'utilisateur télécharger pdf (Page 14)

Electro Industries/GaugeTech

Doc # E113-7-07 V1.04 1-6

1.3:

RS232

Wiring

Details

RS232 communication is capable for a distance up to 50 feet (15.2 m). The Master Port and Slave

Ports 3–16 are 9-pin female RS232 ports. Use standard RS232 extension cables for all RS232

connections.

The RS232 Master Port enables the Substation Multiplexor to communicate directly with a computer

or over a network. The Master Port is DCE or Network selectable. Set the switch beneath the port to:

• Network when using the Substation Multiplexor over a network..

• DCE when connecting the Substation Multiplexor directly to a computer.

RS232

Female

Port

Slave Ports 3–16 are DTE configured. When connecting an RS232 Slave Port to another DTE

device, use a Null Modem to reverse the Rx and Tx pins, as shown below:

RS232 Slave Port Pin

Assignments

DTE

1 N/A

2Rx

3Tx

4 DTR

5 Gnd

6 DSR

7RTS

8 CTS

9 N/A

RS232 Master Port

Pin Assignments

DCE

1 DCD

2Tx

3Rx

4 DSR

5 Gnd

6 DTR

7 CTS

8RTS

9 Ring

Shorted Internally

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 39 40

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Electro Industries SM1-16 Manuel d'utilisateur Page 14