ECS Field Housings for Harsh Conditions Phoenix Contact ECS Field Housings for Harsh Conditions protects integrated electronics from dust, water, and UV radiation for indoor and outdoor applications. The ECS series is IP66/67 rated and has an operating temperature range of -40°C to +85°C. Phoenix Contact ECS Field Housings feature an integrated interlock to guard against the unintentional release of the PCB while a cable binder prevents tampering. Pressure compensation membranes are also available for vented housing designs.