Rockwell Automation 1771-DCM USER MANUAL 1771-DCM - Manual (Page 17)

Connecting Cables
Chapter 4
4Ć3
When using the trunkline/dropline hookup, connect the 1771–DCM to the
serial I/O channel trunkline using a dropline that does not exceed 100 feet
in length (Figure 4.3). Connect the dropline to the trunkline using a T
connector (cat. no. 1770–XG) or a station connector (cat. no. 1770–SC).
There are no restrictions as to the spacing between station connectors or T
connectors if you do not exceed the maximum cable distance. Terminate
the open port at the first and last T connector or station connector using a
Terminator Set (cat. no. 1770–XF).
Figure 4.3
Example Trunkline/Dropline Hookup with T Connectors
PLC -2/30
1772 -SD2
Bl ue
Shield
Clear
1
2
3
Clear
Shield
Blue
2
1
2
1771 -ASB
1
2
Blue
Shield
Clear
1
Remote I/O Chassis 1771 -ASB 1771 -DCM
1771 -DCM
1771 -ASB
Install Terminator Resistor
(cat. no. 1770ĆXF)
12662
1
1
1
Trunkline/Dropline Hookup