Digital isolators for hazardous area applications

Weidmuller’s new high density digital isolators for hazardous locations include modules to convert and isolate digital signals.

11/22/2010


Weidmuller’s new ACT20X high-density digital isolatorsWeidmuller introduces the new ACT20X range of digital isolators, specifically developed for hazardous area applications. This range of intrinsic safety signal conditioners includes modules that can convert and isolate digital signals to and from hazardous areas, as well as versions that isolate and drive digital actuators. Only 22.5mm wide, these space-saving devices are part of Weidmuller’s wide range of isolators and converters for process applications in hazardous areas.

Weidmuller’s ACT20X range includes two types of digital modules – Pulse Isolators and Actuator Drivers. Pulse Isolators accept digital inputs from field equipment within a hazardous area. These include Namur and relay status and frequency signals from flow, pressure or level switches, and proximity sensors for position or motor speed measurements. These Pulse Isolators create isolated outputs for safe area controls.

Actuator Drivers isolate a controller’s digital outputs and drive solenoids actuators and alarm devices in the hazardous area. The limiting value of actuator current produced by the module depends on the hazardous Zone classification.  

Each ACT20X module features an independent error alarm output for monitoring input signals and internal electronics. A dedicated, volt-free contact registers open/short circuits or internal errors for quick problem identification.

The DIN-rail mountable ACT20X offers a number of innovative features. The pluggable field connectors have a lever for easy removal and are individually coded to prevent miss-connection. In addition, the ACT20X modules are offered in single or two-channel forms, so as little as 11mm per channel of DIN-rail space is used.

The ACT20X range of digital isolators have Class 1, Div 2, Zone 0, and Zone 2 approvals with IECEx and ATEX certification, making them suitable for use in hazardous applications worldwide. 

www.weidmuller.com Weidmuller



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