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Concept Concept 4/20/2021
Products: RP-C
Functionalities: Hardware
Product version: 3.0, 3.1, 3.2, 3.3

Wire Sizes and Lengths for the RP-C-16A Controller

This section provides recommendations on wires sizes and lengths for the RP-C controller model RP-C-16A.

The recommendations are for guidance only. Other wire sizes and lengths may be used, depending on wiring rules and when appropriate.

Wire Sizes and Lengths for the RP-C-16A Controller

Terminals

Minimum Cross-sectional Area

Maximum Cable Length

Power input terminals (1, 2)

0.75 mm² (18 AWG) a

According to local wiring rules

Earth ground terminal (3) b

NA a

NA a

24 VAC output terminals (4, 5)

0.5 mm² (20 AWG)

According to local wiring rules

Universal inputs/outputs as digital c inputs

0.25 mm² (22 AWG)

200 m (650 ft)

Universal inputs/outputs as analog d inputs

0.25 mm² (22 AWG)

100 m (330 ft)

Universal inputs/outputs as temperature (thermistor) inputs, up to 75 °C (167 °F)

0.75 mm² (18 AWG)

75 m (250 ft)

Universal inputs/outputs as temperature (thermistor) inputs, up to 75 °C (167 °F)

1.5 mm² (15 AWG)

150 m (500 ft)

Universal inputs/outputs as temperature (thermistor) inputs, up to 150 °C (302 °F)

1.5 mm² (15 AWG)

75 m (250 ft)

Universal inputs/outputs, for actuators and transmitters powered from the same transformer as the RP-C

0.75 mm² (18 AWG)

20 m (65 ft)

Universal inputs/outputs, for actuators and transmitters powered from their own transformer (external or internal)

0.25 mm² (22 AWG)

200 m (650 ft)

Universal inputs/outputs as voltage outputs, for actuators powered via their own transformer (external or internal) or when the outputs have isolated converters

0.25 mm² (22 AWG)

200 m (650 ft)

Relay outputs

0.75 mm² (18 AWG)

According to local wiring rules

High power relay output

0.75 mm² (18 AWG)

According to local wiring rules

Solid-state relay (SSR) outputs

0.5 mm² (20 AWG)

According to local wiring rules

  1. Use wires rated for at least 75 °C (167 °F).
  2. Not internally connected.
  3. Digital or counter inputs.
  4. Supervised, voltage, current, resistive, or 2-wire RTD temperature inputs.
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