Rockwell Automation 8520 9/Series CNC Integration Maintenance Manual Documentation Set - Manual (Page 461)

Section 8
Communication Interface
8-28
You are ready to start receiving and transmitting remote I/O information.
As the remote I/O module responds to commands, you should see this LED
pattern:
LED Status Description
DS4
NA COMM
ACTIVE
ON Active Link to PLC. This is the normal state when the
RIO link is active.
ACTIVE
FLASHING The remote I/O link is active but the PLC is currently in
program mode.
OFF Remote I/O plug is offline. The port is not being used,
not configured in AMP correctly, not turned on with
$RMON, or not attached to a 1771 device.
The remote I/O circuitry and connector are integral parts of the wiring
board in the 9/440 system module. Figure 5A.11 shows the remote I/O
connector mounted on the 9/440 wiring board.
Wire connections for the remote I/O communications are made through the
TB4 NODE ADAPT connector. Connect the wires for remote I/O as
shown in the following figure. Refer to your 1771 I/O documentation for
details on making remote I/O connections.
Figure 8.20
Remote I/O Connector in System Module
9/440 System Module
Open Cover
TB4
RIO
2
SH
LD
RIO
1
Remote I/O
Plug
Cl
ea
r
Sh
ie
ld
Bl
ue
8.9.4
9/440 Remote I/O
Connection