CU3

Safety Relays Back EMF Monitors CU3 Specifications Standards EN 954-1, ISO 13849-1, IEC/EN 60204-1, IEC 60947-5-1, ANSI B11.19, AS4024.1 Cat. 1 per EN 954-1 (ISO13849-1) C-Tick, CE marked for all applicable directives, cULus & TÜV 24V AC/DC or 110/230V AC < 4VA Z1- Z2 Motor voltage 500 V Automatic/manual 2 N.O. Safety; 1 N.C. Auxiliary B300 AC-15 5A/250V AC, 5A/125V AC N300 DC-13 3A/24V DC 500mA time lag 500mA quick acting 5A quick acting 10mA/10V Red = Power on Red/Green = Timing/Output on Yellow = Fault Red = Motor running 2500V -10°C to +55°C (+14°F to +131°F) 90% RH IP40 DIN 0470 IP20 DIN 0470 1 x 2.5mm2 (14AWG) stranded 1 x 4mm2 (12AWG) solid C in accordance with VDE 0110 3 1N⋅m (8lb⋅in) Red Polycarbonate 35mm DIN rail 510g (1.12lbs) 100,000 operations 500,000 operations 1,000,000 operations 2,000,000 operations 2,000,000 operations 0.75mm (0.30in) peak, 10-55Hz 30g, 11ms half-sine Category Approvals Power Supply Power Consumption Inputs Maximum Motor Voltage Reset Outputs Description The CU3 is a control unit which detects stopped motion and is ideal for use with guard locking interlock switches. It is designed to interface with single or three-phase induction motors by measuring the drive voltage and the back electro-magnetic field (emf) of the motor. The front window of the CU3 can be popped off to reveal a replaceable fuse and a potentiometer. The potentiometer sets the threshold voltage measured at terminals Z1/Z2. The maximum threshold voltage is approximately 2.5V peak (potentiometer turned fully CCW). When the voltage at Z1/Z2 exceeds the threshold voltage, the safety outputs de-energize, and the safety contacts at terminals 13/14 and 23/24 open. When the supply to a motor is disconnected, motor speed will reduce to zero. During the run down period the back emf generated by the motor is monitored by the CU3. When the level of the back emf dips below the threshold voltage, the safety outputs close. This enables the output device (e.g., solenoid locking or unlocking switch) to be activated. If the Z1/Z2 circuit opens, the CU3 goes into a fault state, indicated by the fault led. The fault must be corrected and the power to the CU3 cycled to clear the fault state. The 24V DC version must be operated with an isolated supply. The CU3 is not intended for use with variable frequency drives. ➊ Output Utilization per IEC 60947-5-1 (Inductive) Fuses Power (internal, replace.) Motor Input (external) Output (external) Max. Switched Current/Voltage Indication LED Impulse Withstand Voltage Operating Temperature Humidity Enclosure Protection Terminal Protection Conductor Size Installation Group Pollution Degree Torque Settings—terminal screws Case Material Mounting Weight Electrical Life 220V AC/4A/880VA/cosϕ=3.5 220V AC/1.7A/375VA/cosϕ=0.6 30V DC/2A/60W 10V DC/0.01/0.1W Mechanical Life Features • • • • Category 1 per EN 954-1 Stop category 1 2 N.O. safety outputs 1 N.C. auxiliary output Application Details Adjust to suit machine rundown and motor sensitivity. Replaceable Fuse Vibration Shock ➊ See Output Ratings on page 1-29 for details. Consult factory for ratings not shown. 4-70 Safety Relays Back EMF Monitors CU3 Product Selection Safety Outputs Auxiliary Outputs CU3 Power Supply 24V AC/DC ➊ 2 N.O. 1 N.C. 110V AC 230V AC ➊ The 440R-S35001 requires an isolated supply when operating on 24V DC. Catalogue Number 440R-S35001 440R-S35002 440R-S35003 Accessories Description 500mA Fuse Page Number 14-6 Catalogue Number 440R-A31562 Dimensions—mm (inches) Block Diagram 45 (1.77) 120 (4.72) A1 F1 Stop A2 X1 X2 K2 K2 K1 Sensitivity Run K3 Fault 13 23 K3 31 K3 K2 K1 K1 K1 73 (2.87) ~ 24VDC K1 K2 35mm DIN Rail Mounting Power Logic Q1 K2 Z1 Z2 14 24 32 Typical Wiring Diagrams 24V DC K1 (aux) Start Stop 500mA Fuse Guard Closed & Locked A1 42 41 12 22 TLS1-GD2 54 53 34 33 23 31 X1 K2 K2 (aux) L1 L2 L3 A1 Z1 13 A2 CU3 K2 11 K1 21 A2 Z2 14 24 32 X2 K2 500mA Fuse Aux M Ground Guardlocking Safety Gate, Back EMF Detection, Automatic Reset, Monitored Output 4-71