Sigma ZSi UL

Sigma ZSi UL status units are a UL approved accessory to the Sigma ZXT UL extinguishant release panel. The units provide remote system status indications and minimal controls at additional points of access and egress for the protected area.

High brightness LEDs provide visual indication of extinguishant system status – Manual Mode, Auto/Manual Mode, Abort operated, Release disabled, Pre-Activated/Activated and Released. A seven segment LED display provides a countdown timer counting down the time to extinguishant release. ZSi UL status indicators can also provide limited controls with the option of a Mode select keyswitch which allows the user to switch between Manual Only and Auto/Manual extinguishing activation modes.

Status units connect to the Sigma ZXT UL control panel via a monitored RS485 data bus which supports up to 7 status units. Each status unit is identified on the data bus by its own unique address.