To prevent ignition of flammable gas, dust or vapor, the system limits the amount of electrical energy through edge-detector cables. Intrinsically-safe edge detectors are designed to withstand extreme temperatures while automatically compensating for changing environmental conditions such as dust and humidity, or for contaminants that can build up on the sensors. This eliminates the need for constant cleaning and recalibrating.
Explosion-proof actuators are continuously air-purged to prevent accumulation of flammable or combustible mixtures around the actuator motor and cable wiring. A separate return duct and pressure sensor continuously monitor airflow to automatically shut off actuator power in the event of a leak. Available with a brushed DC motor or a high-performance brushless AC motor.
The Micro 4000NET controller sits outside the hazardous environment and features an intuitive operator touchpad with LED indicators. Discrete I/O interfacing is standard, with optional adapters to interface with other fieldbus networks, including ControlNet™, DeviceNet™, Modbus Plus, Profibus®-DP and Ethernet protocols.
AccuWeb, Inc., 608-310-8153, www.AccuWeb.com