Issue
What are the IO wiring requirements for the IO Modules?
Product Line
EcoStruxure Building Operation
Environment
- Analogue, Digital, Input, Output
- Cables
- UI-16, DI-16, AO-8-x, AO-8-V-x
- UI-8, DO
- b3 Inputs
Cause
The existing documentation does not specify the exact cable types to be used.
Resolution
Different types of sensors can be used that come from different legacy systems, so cable types specified for the legacy systems will be appropriate for the same sensor type being connected to an Automation Server I/O module.
If you are using Xenta sensors with the 1.8K Ohm thermistors you should use the wiring rules as per the Xenta documentation. Of if you use Continuum 10K Ohm sensors, use the Continuum IO wiring rules etc.
Some suitable cables for most Analogue and Digital input, also analogue output applications are:
- 18 AWG (16 x 30) 0.823 mm2 - single pair screened e.g. Belden 8760
- 22 AWG (7 x 30) 0.325mm2 - single pair screened e.g. Belden 8761
The maximum distances that these cable can be run are dependent on the input requirements, for Temperature inputs this will depend on the temperature range and accuracy required.
For examples of of these cable distances see links below:
For digital outputs cable should be used with appropriate size (current rating) to the loads being switched.
It is recommended to use screened cables and also ensure correct connections for analogue inputs as detailed in How to wire an Analog input to an IO Module.
