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Expo Technologies ETM-IS11-113 ETM-IS51-113 identifies intrinsically safe electronic timer-module configurations used with the ET MiniPurge purge and pressurization system family. The timer module manages the timed purge sequence required before protected electrical equipment is energized.
The ETM-IS electronic module uses BCD switches for timer settings and interfaces with the timing-enable pressure switch and solenoid valve. Four integral indicators provide status information during operation, supporting commissioning and maintenance checks.
These modules must be installed within the specified enclosure and wired according to the official D818 ET MiniPurge manual and certification requirements. Exact suffix, power arrangement, hazardous-area approval, pressure-switch input, and valve interface must be confirmed before replacement.
The timer module enables the certified purge timing sequence through the pressure-switch input and solenoid-valve control interface.
Confirm the complete ordering suffix, protection concept, enclosure, supply arrangement, and certification before replacement.
Set the BCD timer only to the documented value, verify the four status indicators, and complete all leakage, pressure, valve, and interlock checks in the official manual.