2964306

ELR W 1/10-24DC Electronic Reversing-Load Relay for DC Motors INTERFACE Data sheet 100218_en_01 1 © PHOENIX CONTACT - 02/2009 Description The electronic reversing-load relay (ELR-DC) allows the switching of mechanically commutated DC motors. They can be used to reverse and brake DC motors up to 24 V/10 A without wear. An output that is protected against shortcircuits, overvoltages and overloads, ensures reliable application in the system. The integrated confirmation output returns ELR-DC error information to the control system, e.g., a short-circuit or a broken cable in the motor. 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. During startup the electronic load relay limits the motor current to 21 A. This protects the motor from unwanted magnetic reversal current. State Table Input Output Right Left 0 0 1 0 + 24 V GND 0 1 GND + 24 V 1 1 GND GND Make sure you always use the latest documentation. It can be downloaded at www.phoenixcontact.net/download. This data sheet is valid for all products listed on the following page: OUT 1 (+) OUT 2 (–) High resistance High resistance ELR W 1/10-24DC 2 Ordering data Description Type Order No. Pcs./Pkt Electronic reversing-load relay, for controlling DC motors, with LED display and protective circuit ELR W 1/10-24DC 2964306 1 3 Technical data Input Data Operating voltage 24 V DC ± 20 % Current consumption, maximum 10 mA Control voltage right/left 24 V DC ± 20 % Input current right/left approx. 3 mA Transmission frequency flimit 1000 Hz Input wiring Operating indicators (green LED), polarity protection diode Output Data Operating voltage area 10 - 30 V DC Continuous load current, maximum 10 A Short-circuit current limit 21 A Voltage drop at maximum load current