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| Safety Relays Timing Control Units CU4 Specifications Standards EN 954-1, ISO 13849-1, IEC/EN 60204-1, IEC 60947-5-1, ANSI B11.19, AS4024.1 Cat. 3 per EN 954-1 (ISO13849-1) C-Tick, CE marked for all applicable directives, cULus and BG 24V AC/DC, 50/60 Hz 0.85 to 1.1 x rated voltage 2.5W 1 N.C. or 2 N.C. Infinite 2 N.O. Safety; 1 N.C. Auxiliary B300 AC-15 5A/250V AC, 5A/125V AC N300 DC-13 3A/24V DC 0.15 to 30s 6A Slow Blow or 10A Quick Blow 10mA/10V Ag Sn O2/0.5 Au 30msec Green = Power Green =CH t1 Active Green = CH t2 active 2500V 2 -5C to +55C (+23F to 131F) 90% RH IP40 (NEMA 1) IP20 0.2-4mm2 (24-12AWG) 0.4Nm (3.54lbin) 35mm DIN rail 165g (0.36lbs) 100,000 operations 500,000 operations 1,000,000 operations 2,000,000 operations 2,000,000 operations 10-55 Hz, 0.35mm 10g, 16ms, 100 shocks Category Approvals Power Supply Power Consumption Safety Inputs Input Simultaneity Outputs Output Utilization per IEC 60947-5-1 (Inductive) Description The CU4 is an off-delay timing unit which can be operated standalone or as an extension of a host relay. The timed outputs are used in applications where power must be maintained for a fixed duration after an input signal is received. For example, driving a power to lock TLS2-GD2 to maintain a guard door in the locked position for a fixed duration after a stop button is pressed. Another example would be maintaining the connection of a drive to a motor until the braking function is achieved, and then dropping out a contactor to remove power to the motor. The inputs can be connected in either a single channel or dual channel configuration. The inputs must remain closed during the complete timing cycle. Opening the contacts before the timing cycle completes causes the timer to be reset to zero. The CU4 has a redundant structure with two independent safe timer circuits. The outputs include two normally open safety delayed outputs as well as one normally closed safety output. The safety outputs have independent and redundant internal contacts to help ensure the safety function. When used an extension of a host relay, the normally closed contacts should be used in the feedback loop of the host relay. If used in standalone application, the normally closed contacts can be used to signal an auxiliary device or PLC. A typical operation starts with power applied to A1/A2 and the input circuits open. 1. Close the B11/B12 and B21/B22 circuits. a. The safety outputs (17/18 and 27/28) close immediately. 2. Open the B11/B12 or B21/B22 circuits. a. The timing process starts. b. The safety outputs (17/18 and 27/28) open after the time expires. 3. Go to Step 1. Timed Off-Delay Fuses Output External Min. Switched Current/Voltage Contact Material Response Time Indication LEDs Impulse Withstand Voltage Pollution Degree Operating Temperature Humidity Enclosure Protection Terminal Protection Maximum Conductor Size Torque Settings--terminal screws Mounting Weight Electrical Life 220V AC/4A/880VA cos=0.35 220V AC/1.7A/375VA cos=0.6 30V DC/2A/60W 10V DC/0.01A/0.1W Mechanical Life Vibration Shock Features * * * * * * Category 3 per EN 954-1 Stop category 1 Timed off-delay 0.15s to 30s 2 Safety contacts 1 Auxiliary contact 1 Monitoring contact See Output Ratings on page 1-29 for details. Consult factory for ratings not shown. 4-64 Safety Relays Timing Control Units CU4 Product Selection Inputs Safety Outputs Auxiliary Outputs Timing Range 0.15 - 3s 1 N.C. or 2 N.C. 2 N.O. 1 N.C. 0.5 - 10s 1.5 - 30s Catalogue Number 440R-S23173 440R-S23174 440R-S23175 Dimensions--mm (inches) Block Diagram 22.5 (0.88) 75.0 (2.95) A1 35 K1 K2 36 18 17 B11 17 27 27 B12 35 110 (4.33) 18 28 B21 28 36 B22 A2 Typical Wiring Diagrams Aux Circuit 81 K1 L1 L2 L3 A1 B11 B21 17 27 35 A1 E-Stop A1 S11 S12 S21 S22 S23 X2 13 23 33 43 53 Solenoid 42 41 12 22 34 Aux Circuit 54 53 33 +24V DC MSR124RT A2 PE Y1 Y2 X5 X6 X1 14 24 34 44 54 82 K2 CU4 A2 M A2 B12 B22 18 28 36 11 21 Reset K1 K2 TLS2-GD2 Power to Lock Ground Dual Channel Wiring to CU4 Inputs Aux Circuit 81 K1 L1 L2 L3 A1 B11 B21 17 27 35 A1 E-Stop A1 S11 S12 S21 S22 S23 X2 13 23 33 43 53 Solenoid 42 41 12 22 34 Aux Circuit 54 53 33 +24V DC MSR124RT A2 PE Y1 Y2 X5 X6 X1 14 24 34 44 54 82 K2 CU4 A2 M A2 B12 B22 18 28 36 11 21 Reset K1 K2 TLS2-GD2 Power to Lock Ground Single Channel Wiring to CU4 Inputs 4-65 |
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