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Ex PCs / Workstations

Ex measuring- and control devices

Pressurized enclosure systems (Ex p)

F830 F840 F850-SYST F850S F850U F860S F870S OEM SR852 SR853
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Disconnector unit SR852 - Description

SR852

Concept

The disconnector unit SR852 is designed to separate non intrinsically safe interconnections direct in hazardous area in combination with a purging system.

Ex e Relay contacts

For this purpose the SR 852 has 8 respectively 16 galvanically separated relay contacts, which open if the control voltage is low.

Save power off

The opening is safe with one fault, because there are two separate independent serial relay contacts for each interconnection. (according EN 954-1, category 3 )

Simple cascading

Using the terminal pair 9/19 and 10/20 it is possible to cascade several disconnector units.

  last modified: 01.12.2010