Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 436)

Section 8
Communication Interface
8-3
The figures below show the wiring connections for the RS-232 interface
with hardware handshake. The arrows in the following figures indicate the
signal flow direction. Figure 8.1 shows the wiring connections when the
CNC is a DCE (Data Communication Equipment) device and the
peripheral is a DTE (Data Terminal Equipment) device. A DTE device
transmits data on pin 2, and a DCE device transmits on pin 3. Figure 8.2
shows the wiring connections when the CNC and the peripheral are both
DCE (Data Communication Equipment) devices. On the 9/230 systems all
communications connections are made with port B.
Figure 8.1
RS-232 Cable Wiring with Hardware Handshake (DCE to DTE)
Hardware
Handshake
CNC Peripheral
(DCE) (DTE)
SH
SD
RD
RS
CS
GND
1
2
3
4
5
7
SH
GND
1
2
3
4
5
7
SD
RD
RS
CS
Figure 8.2
RS-232 Cable Wiring with Hardware Handshake (DCE to DCE)
CNC Peripheral
SH
SD
RD
RS
CS
GND
(DCE) (DCE)
Hardware
Handshake
1
2
3
4
5
7
SH
SD
RD
RS
CS
GND
1
2
3
4
5
7
11349-I
8.3
Connection of Peripherals