The solenoid driver EMD-1 is designed for contactless switching on and off of pull and hold solenoids and demagnetization after switching off, which ensures release even without a spring. To apply the magnet, the driver has a standard PNP input that can be controlled directly from the output of the programmable controller.
The EMD-1 driver replaces the electromechanical relay with overvoltage limiter. A new very useful function ─ demagnetization of the solenoid core. solenoids can develop a pulling force of up to ten percent of rated force after de-energization due to residual magnetism, especially if the surfaces are smooth. In this case, the solenoid and the yoke (retractable part) may stick to the magnet, which is solved by the demagnetization circuit of the driver.
The testing process is logged and stored in short intervals. The csv and txt protocols are accessible over LAN. At the end of testing the actual A·h or W·h value of the device under test is also displayed on bright OLED display of BTB.
The magnet is switched on and off via the digital input of the EMD-1 driver. When a control signal is given, the driver turns on the solenoid; when the signal is turned off, the voltage is removed from the solenoid coil and a demagnetizing current pulse is given.
The control block EMD-1 is made with the dimensions of a 35 mm DIN mounting rail module (width 18 mm) and is intended for installation on a DIN rail.
Basic technical data
Rated voltage: 24 V DC,
maximum operating current of the solenoid: 300 mA,
control input current consumption: approx. 6 mA, PNP logic,
permissible current of output terminals 3-3, 4-4: 50 mA.
Driver connections
Inputs
“+” – positive pole (plus) of the power supply,
“-” – negative pole (minus) of the power supply,
“IN” – control input.
Outputs
“O1”, “O2” – solenoid connection terminals; polarity is not important,
N – not connected.
NB! The supply voltage must be connected correctly – incorrect polarity can damage the solenoid driver.