Use the following figure to estimate the maximum cable length relative to the wire size and the load current (in mA) when wiring inputs and outputs.
Note: The following figure applies to low-voltage (<30 V) inputs and outputs only.
Determine the required wire size and length for high-voltage (>30 V) relay outputs by the
load connected to the relay and local electrical codes.
Figure 1. Maximum Wire Length for Low-Voltage (<30
V) Inputs and Outputs by Current and Wire
Size