Rockwell Automation 1747-SN Remote I/O Scanner - Manual (Page 11)

Remote I/O Scanner 11
Publication 1747-IN060D-EN-P - November 2002
For New Installations
To ensure a proper earth ground of the cable shield, follow these steps:
1. While the RIO link connector is plugged into the scanner and lines 1 and 2
are connected, strip the cable back to expose enough shield drain wire to
reach a chassis mounting bracket.
2. Attach the ring terminal lug (supplied) to the end of the shield drain wire.
3. Attach the ring terminal lug to the SLC chassis mounting bracket. Note that
for new installations the middle (shield) terminal is not used when
connecting to the scanner.
For Series A Scanner Retrofits
Refer to the illustration on page 10. To eliminate the need to strip the cable back,
follow these steps:
1. Attach the shield wire and a short piece of #20 AWG wire (dotted line) to the
shield lug of the RIO link connector.
2. Attach the other end of the #20 AWG wire to the ring terminal lug.
3. Attach the ring terminal lug to a chassis mounting bracket.
IMPORTANT
The RIO cable shield must be grounded at the scanner end only.
IMPORTANT
The RIO cable shield must be grounded at the scanner end only.
Ensure that the unshielded portion of the link communication
wire (blue and clear) is as short as possible.