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D-30542 Hannover
Kronsberger Straße 25
D-30559 Hannover
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Solenoid valve driver ES-ITD, actuation and diagnostics for switching solenoid valves

or current driver, DC relay, DC load relay

    Your benefit

    • Reduced costs through predictive maintenance
    • Diagnostics without other sensors, e.g. of the working end position, activation time, armature sticking, short circuit and undervoltage monitoring
    • 2-pole electrical isolation in the event of a short circuit
    • Open-circuit and short-circuit detection at the load, even when not activated
    • Fast reaction time, thus high control frequency possible
    • Overvoltage limiting during switch-off of the valves increases the life time of the power supply units
    • Temperature reduction at the solenoid valves, thus longer life time
    • Smaller power supplies due to reduced power requirements
    • Suitable for use in IT distribution systems
    • Small, space-saving design
    • User-friendly plain text display, 4 lines with 8 characters each, choise of display language
    • Increased ease of service when using the version with plug-in terminals
    • Galvanically isolated signal outputs for actuated valve, warnings and errors
    • Switching cycle counter for the load
    • Operating hours counter



    The current driver ES-ITD is used for the actuation of solenoid valves and lifting magnets. A small plain text display simplifies commissioning and error detection.


    After turning on the load the current is reduced to the holding current (approximately 60% of the rated current). Due to the low holding current there is a significant reduction in temperature and thus a longer service life of the solenoid.


    Short circuit as well as breakage in the supply line to the solenoid are detected without actuation of the load. Also, a too low supply voltage leads to a message. Warning and error messages are indicated by a yellow or red LED and a plain text display. They can be indicated, isolated on transistor outputs, to a higher-level control, e.g. a PLC.


    Additionally the correct armature movement is monitored and e.g. a stuck armature is reported as an error. Even if the working end position of the armature is not achieved or the armature requires a greatly increased switching time, this is reported as an error.


    As of the hardware version F 1.00 the devices are also suitable for operation in IT distribution systems.




    • Rated supply voltage 24V … 48V DC (-5% / +25%)
    • Rated load current 0,05A…3A DC
    • To drive solenoid switch valves, not for proportional valves
    • Suitable for use in IT distribution systems
    • After the load has been switched on, power is reduced to a configurable holding value
    • Cable break and short-circuit monitoring at load output, in both actuated and unactuated state
    • Solenoid valve diagnostics with no other sensors, e.g. end position, activation time and armature sticking
    • Galvanically isolated indicator outputs for actuated load, warnings and errors
    • Switching-cycle counter for load
    • Operating-hour counter for ES-ITD
    • Small plain-text display, 4 lines of 8 characters, selection of display language
    • Device measurements max. 111,4 x 22,5 x 124,5mm3, Mounting on IEC/EN 60 715 top-hat rail


    Operating manual

    Last update Thursday, 02. July 2020, © schaeper AUTOMATION GmbH