Rockwell-automation 1758-RTU202 DataSite Hardware User Manual User Manual download pdf (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

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Rockwell-automation 1758-RTU202 DataSite Hardware User Manual User Manual Page 25