Wired Zone Expansion Modules Frequently Asked Questions

4208U Vs. 4208SN
The 4208U and the 4208SN are both 8-Zone hardwire expansion modules with some differences between them. Read on to learn about these two polling loop expansion modules.
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Can I Use a Honeywell 4219 Zone Expander on a VISTA-50P?
The VISTA-50P is a polling loop alarm panel, and it can only support polling loop zone expanders. It will not support a Honeywell 4219. Learn about the VISTA-50P.
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