Digital output modules (DOM) can be used to operate four or eight intrinsically safe solenoid and hydraulic valves and indicator elements. The Ex ia/ib output characteristics are optimally configured for a wide range of solenoid valves. An Ex i control input for the system “Off” switch (IEC 61508 up to SIL 2) is also available for the Zone 1 versions.
The Ex i outputs are short-circuit proof and galvanically separated from the system.
A blue LED and diagnostic messages provide early warnings that maintenance is required in order to avoid system downtime.
The Zone 1 versions have additional LEDs for each channel to indicate any line faults and the switching state.
In addition, there are versions with relay outputs for non-Ex i solenoid valves and with eight integrated pilot valves for direct pneumatic connection.
- Efficient: Four or eight channels for virtually all solenoid valves (Ex i, Ex d, Ex m), or alternatively, integrated pneumatics
- Ex ia outputs with Ex e or pneumatic connection for installation in Zone 1 or 2 – certain configurations suitable for SIL 2
- Hot-swappable: Can be replaced while the system is in operation
