Edwards M500MF — intelligent monitor module for EST IRC-3 ZAS-1 signaling line circuits.
This is legacy Edwards Systems Technology stock. The M500MF appears in EST IRC-3 documentation as a sensor input module carried on the ZAS-1 addressable circuit. Edwards published an IRC-3/FCC to EST3 migration application guide, so these are normally bought as spares to keep an existing panel running.
- Intelligent monitor module for the EST IRC-3 ZAS-1 / ZAS-1S circuit
- ZAS-1(S) supports up to 96 sensor addresses and 96 module addresses
- Module addresses on a ZAS-1 circuit may not be duplicated
- Listed in the EST IRC-3 System Compatibility Manual, P/N 270844
Edwards used several closely spaced catalogue numbers on this loop — M500MFB (monitor), M501MF (mini-monitor), M500CFS (control), M500XF (isolator) and the ULC-listed M500MA. They are not interchangeable, so match the number on the module being replaced or on the drawings. This is not a Signature device and will not work on a SIGA loop.
