Rockwell Automation 1771-DCM USER MANUAL 1771-DCM - Manual (Page 16)

Connecting Cables
Chapter 4
4Ć2
When using the daisy chain hookup (Figure 4.2), splice each I/O chassis
into the main communication line (serial I/O channel). Install a 150 ohm
terminator resistor between the terminals of Lines 1 and 2 at the scanner
and at the last hookup on the main communications line to terminate both
ends of the line.
Figure 4.2
Example Daisy Chain Hookup
PLC-2/30
1772 -SD2 Blue
Shield
Clear
1
2
3
Clear
Shield
Blue
2
1
2
Blue
Shield
Clear
1771 -ASB
1
2
Blue
Shield
Clear
1
Clear
Shield
Blue
Remote I/O Chassis
1771 -ASB 1771 -DCM
1771 -ASB 1771 -DCM
Install Terminator Resistor:
150ohm1/2 watt
1
1
12661
Daisy Chain Hookup