Solenoid drivers galvanically isolate the switching intrinsically safe solenoid valve from the control system. Connecting solenoid drivers to a safety card solves compatibility issues between the field device and the diagnostics on DO cards. While the overall safety function remains unaffected, users can make full use of all available diagnostics and protection measures of the DO-cards during operation, including:

• test pulses with frequencies in the kHz range and durations in the µs range
• a certain load current (depending on card and manufacturer) in ON and OFF condition
• an inrush current limitation to protect the DO card

The new K-System solenoid drivers with LFT let users take full advantage of line fault detection features on expensive DO cards, without any additional wiring. Line faults can be easily located on the field or control side, simplifying continuous monitoring and increasing plant availability.

• The only loop-powered solution with test pulse suppression and line fault transparency
• Compatible with DO cards of all major control and ESD systems
• 12.5 mm housing design for high packaging density
• Entity parameters cover 90 % of all available intrinsically safe solenoids
• SIL 3 according to IEC 61508
• Loop or bus powered solution in one device