Issue
What kind of noise/surge protection is provided in the electronic circuit of Andover Continuum controllers?
Product Line
Andover Continuum
Environment
- All CXs
- All i2 devices
- All B3 devices
Cause
Many projects specify the need to provide controller inputs and outputs with surge protection via optical isolation, metal oxide varistors (MOV), or silicon avalanche devices. In many cases fuses are not permitted for surge protection.
Resolution
Summary of noise/surge protection provided in the electronics of Continuum controllers.
- OUTPUTS:
On relay output points the relay itself provides an inherent isolation of about 2500V. Additionally a MOV could be added for more protection.
When adding an MOV, it should be placed at the load and not at the controller for maximum protection. - INPUTS:
Most of the controllers (but not all) include TVS (Transient Voltage Suppressors) although they ARE NOT optically isolated, it may be possible to get off the shelf optically isolated TVS for additional protection.
Note that ALL controllers have passed EMC compliance test for noise and voltage surge.