Rockwell Automation 1775-S5_SR5,D17756.5.5 User Manual PLC-3 FAMILY I/0 - Manual (Page 25)

Scanner Hardware and Installation
Chapter 1
1-16
The terminal arm provides connections for four I/O communication
channels (Figure 1.11). Functions of these channels include:
I/O communication
backup communication
peer-to-peer communication
If you select: Then the maximum I/O channel cable length can be:
57.6 kbps 10,000 feet
115.2 kbps 5,000 feet
230.4 kbps 2,000 feet
Important: If you set the protocol for channel four to a DH or DH+ link,
the scanner automatically disables the channel four terminals, and enables
the DH/DH+ connectors (see “Connecting to a DH or DH+ Network,”
page 1-13).
Figure 1.11
I/O Channel Terminal Arm Connections
Line 1
Shield
Line 2
Line 1
Shield
Line 2
I/O
Channel 4
I/O
Channel 2
Line 1
Shield
Line 2
Line 1
Shield
Line 2
Blue
Clear
1770ĆXT
Terminator
I/O
Channel 3
I/O
Channel 1
15409
Twinaxial Cable
(cat. no. 1770ĆCD)
Connects to a Remote I/O Device for I/O communication or a scanner
in another PLCĆ3 or PLCĆ3/10 chassis for peerĆtoĆpeer or backup communication.
If the scanner is at the end of the channel, set the terminator switch corresponding
to the channel number. If the channel is configured for I/O at 230.4 kbps, disable
the terminator for the channel and install an external 82 ohm terminator
(optional)
Connecting to the I/O
Channel Terminal Arm