User Manual PLC-3 FAMILY I/0 Instruction Manual

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 T erminal 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
1770XT
Terminator
I/O
Channel 3
I/O
Channel 1
15409
Twinaxial Cable
(cat. no. 1770CD)
Connects to a Remote I/O Device for I/O communication or a scanner
in another PLC3 or PLC3/10 chassis for peertopeer 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