User manual

e Electro Industries/GaugeTech Doc # E113-7-07 V1.04 1-6
1.3: RS232 Wiring Details
Q
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.
Q
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
Q
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
PIN
DTE
1 N/A
2Rx
3Tx
4 DTR
5 Gnd
6 DSR
7RTS
8 CTS
9 N/A
RS232 Master Port
Pin Assignments
PIN
DCE
1 DCD
2Tx
3Rx
4 DSR
5 Gnd
6 DTR
7 CTS
8RTS
9 Ring
Shorted Internally