Allen-Bradley 1747-SN Installation Instructions Manual page 10

10 Remote I/O Scanner
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.
Important: The RIO cable shield must be grounded at the scanner
end only.
Publication 1747-5.33
RIO Link
Connector
Chassis Mounting
Bracket
Terminating Resistor
Last Physical Device End
RIO Scanner
RIO Link
Connector
Line 1 – Blue
Shield – Shield
Line 2 – Clear
Ring Lug
Shield
Drain Wire
(For New Series B Installations)
Terminating
Resistor
Scanner End
Shield Drain Wire
(For Series A Retrofits)