Rockwell Automation 1799-DASCII DeviceNet Serial Interface - Manual (Page 11)

DeviceNet Serial Interface Module 11
Publication 1799-IN012B-EN-P - July 2008
RS-232 without Hardware Handshaking
Follow these steps to connect the RS-232 wiring without hardware handshaking.
1. Connect the receive wire to pin 2 (RXD).
2. Connect the transmit wire to pin 3 (TXD).
3. Connect common to pin 5 (common).
The channel automatically operates in RS-232 mode when these pins are
connected.
The RS-232 electrical interface uses a MAX232 transceiver or electrical equivalent.
RS-232 with Hardware Handshaking
When implementing RTS/CTS handshaking, follow these steps to connect RS-232
wiring.
1. Connect receive to pin 2 (RXD).
2. Connect transmit to pin 3 (TXD).
3. Connect transmit/handshaking to pin 7 (RTS).
4. Connect receive/handshaking to pin 8 (CTS).
5. Connect common to pin 5 (Common).
The channel automatically operates in RS-232 mode when these pins are
connected.
IMPORTANT
All pins are active. Do not connect to other pins.
IMPORTANT
All pins are active. Do not connect to other pins.