101764_01_en 1
ELR W 1/2-24DC
ELR W 1/6-24DC
01/2005Data Sheet
Features
ELR-DC electronic reversing-load relays can be used
to switch mechanically commutated DC motors.
They can be used to reverse and brake DC motors up
to 24 V/6 A without wear. An output that is protected
against short circuits, surge voltages, and overloads,
ensures reliable application in the system.
If a 24 V DC signal is connected to the "left" input, the
ELR-DC is switched so that the output supplies
voltage to the motor. If the "right" input is controlled,
the polarity of the voltage at the output is reversed. By
activating both inputs, "left" and "right", the motor is
brought to a halt by the ELR-DC.
The amount of cabling required is reduced to a
minimum by the internal locking switch and the load
wiring.
Technical Data
Input Data ELR W 1/2-24DC ELR W 1/6-24DC
Control voltage U
ST
right/left 24 V DC ±20%
Control input current I
ST
right/left 3 mA, approximately
Input wiring Diode for protection against polarity reversal,
surge protection,
yellow right rotation LED (R),
yellow left rotation LED (L)
PWM Option (PWM = Pulse Width Modulation) ELR W 1/2-24DC ELR W 1/6-24DC
Maximum clock frequency of PWM at the control inputs 1 kHz
Pulse duty factor of PWM 0% - 100%
Output Data (Output) ELR W 1/2-24DC ELR W 1/6-24DC
Operating voltage range 10 V DC - 30 V DC
Zero-signal current in the OFF state 7 mA
Output wiring Protection against polarity reversal, surge protection
Electronic Reversing-Load Relay
for DC Motors
