Rockwell Automation 1758-RTU202 DataSite Hardware User Manual - Manual (Page 25)

Publication 1758-UM001D-EN-P - June 2011
Wiring the Controller 25
• Allow for at least 50 mm. (2 in.) between I/O wiring ducts or terminal
strips and the controller.
• Route incoming power to the controller by a path separate from the
device wiring. Where paths must cross, their intersection should be
perpendicular.
• Separate wiring by signal type. Bundle wiring with similar electrical
characteristics together.
• Separate input wiring from output wiring.
• Label wiring to all devices in the system. Use tape, shrink-tubing, or
other dependable means for labeling purposes. In addition to labeling,
use colored insulation to identify wiring based on signal characteristics.
For example, you may use blue for DC wiring and red for AC wiring.
Wiring the Terminal Block
The DataSite controllers have screw-cage clamps on the input and output
terminal blocks. With screw-cage clamp terminal blocks, there is no need to
attach additional hardware such as a spade lug to the wire, or to use a
finger-safe cover.
To wire the terminal block:
1. Strip the end of the wire.
The recommended length for the stripped end of the wire is
11.0 mm (0.440 in.).
2. Insert it into an open clamp.
3. Using a small, flat-blade screwdriver, tighten the terminal screw. To
ensure that the wire conductor is secured inside the clamp, tighten it to
the rated torque, 0.8 Nm (7.0 in-lb).
TIP
Do not run signal or communications wiring and power wiring
in the same conduit. Wires with different signal characteristics
should be routed by separate paths.
Wire Requirements
Wire Type Wire Size (2 wire maximum per terminal screw)
1 wire per terminal
2 wire per terminal
Solid Cu-90°C (194°F) #12 to #22 AWG #16 to #22 AWG
Stranded Cu-90°C (194°F) #14 to #22 AWG #18 to #22 AWG
Wiring torque = 0.8 Nm (7.0 in-lb) rated