Power surge protection kit for 24VAC/DC power terminals connections.
$36.54
Triac surge protection kit for the Triac outputs
EC-BOS-8 – Add-on dual port RS-485 module. Complies with UL 864, UUKL Smoke Control Listing.
100 VA 120/24 VAC power supply, 10Amp circuit breaker
Subnet surge protection kit for subnetwork ports.