Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 437)

Section 8
Communication Interface
8-4
The figures below show the wiring connections for the RS-232 interface
without hardware handshake. The arrows in the following figures indicate
the signal flow direction. Figure 8.3 shows the wiring connections when
the CNC is a DCE (Data Communication Equipment) device and the
peripheral is a DTE (Data Terminal Equipment) device.
Without hardware handshake, if the peripheral needs RR , connect the TR
(Terminal Ready) pin to the RR (Received Line Signal Detector - carrier
dated) pin on the peripheral. Figure 8.3 and Figure 8.4.
Figure 8.3
RS-232 Cable Wiring without Hardware Handshake (DCE to DTE)
7
5
4
3
2
1
7 GND
5
4
3
2
1
SD
SH
RD
RS
CS
GND
SH
(DCE) (DTE)
CNC
No Hardware
Handshake
Peripheral
11350-I
SD
RD
RS
CS
Figure 8.4 shows the wiring connections when the CNC and the peripheral
are both DCE (Data Communication Equipment) devices.
Figure 8.4
RS-232 Cable Wiring without Hardware Handshake (DCE to DCE)
CNC
No Hardware
Handshake
Peripheral
(DCE)
SH
SD
RD
RS
CS
GND
1
2
3
4
5
7
1
3
5
7
2
4
SH
GND
(DCE)
11351-I
SD
RD
RS
CS