MAIN MENU PRODUCTS APPLICATIONS INDEX SELECTION GUIDE Description Control Units Compact Although extremely small, these units supply a large electrical current (200 mA) and are suitable for DIN-rail mounting. CU Series CU Series Features CU-21TA equipped with multi-mode timer function lCompact power supply units There are three modes to choose from: ON-delay, OFF-delay, and lBuilt-in logic control function One-shot. A selector (DIP switch) allows easy signal inversion. lDesigned for photoelectric and proximity sensors lBuilt-in multi-mode timer (CU-21TA) Edge-synchronous function KEYENCE’s original circuitry enables the rising or falling edge of the sensor’s input signal to be identified and used as a synchronous input. Rising edge Falling edge Application of edge-synchronous function Detection of labels Sensor for label detection Sensor for synchronization CU-21TA The CU-21TA (synchronous mode) allows synchronization with only one edge-detecting sensor rather than the two sensors previously required. 268 MAIN MENU PRODUCTS APPLICATIONS INDEX SELECTION GUIDE Control Units CU Specifications Type Multi-functional Standard Model CU-21TA CU-21A DC output 12 VDC±10%, 200 mA max. 12 VDC±10%, 200 mA max. No. of inputs 22 Input InputsystemTransistor(viaNPNoutputdevice),contact(vialimitswitch/microswitch,etc.) 1. 2. Minimuminputtime 0.5ms 5ms Relaycontact 250VAC2ASPDT(1c)(resistiveload)250VAC2ASPDT(1c)(resistiveload) Controloutput 3. 4. Transistor NPN:100mA(40VDC)max. — ON-delay,OFF-delay,One-shot, Timermode — timerOFF(selectable) Timer Timerperiod0— .05to1s/0.5to10s(selectable) Inputsignalinversion,edgesync./levelsync. Otherfunctions ANDlogic selectable,ANDlogic Operationmode Timer,standard,synchronousStandard,synchronous Powersupply 90to264VAC,50/60Hz90to264VAC,50/60Hz Powerconsumption 7.VAmax. 7VAmax Ambienttemperature -°10to+50C -° 10to+50C Weight Ag pprox.120g Approx.105 1. Required off time: 1.5 ms minimum. 2. Required off time: 15 ms minimum. 3. NPN output can easily be converted to PNP output by connecting the optional OP-5148 PNP output converter. 4. With overcurrent protective circuit. Connections IN 1 CU-21TA IN 1 CU-21A 12 V 0 V 12 V 0 V 10 11 12 10 11 12 IN 2 (Sync.) IN 2 (Sync.) 7 89 7 89 45 6 45 6 COM N.O. N.C. COM N.O. N.C. 12 3 12 3 NPN output 90 to 264 VAC 90 to 264 VAC Timing Chart 1.Outputs for T seconds after the rising edge of the AND ON IN 1 (IN1 and IN2) output, and turns off at the falling edge of OFF (signal input) the AND output. IN 2 ON (synchronous input) OFF 2.Continues output for T seconds after the AND (IN1 and ON Output (direct) OFF IN2) output turns off. T ON Output 1. (ON-delay) T OFF T 3.Outputs for T seconds after the rising edge of the AND ON Output (IN1 and IN2) output. 2. OFF (OFF-delay) T T ON Output 3. (One-shot) OFF 269 MAIN MENU PRODUCTS APPLICATIONS INDEX SELECTION GUIDE Control Units CU Part Names and Functions 4 Mode selector a: ON-delay mode Outputs after a fixed period. DIR. 1 6 2 7 b: OFF-delay mode 3 8 Continues output for a fixed period DIR. 4 after the detection signal goes off. 5 9 c: One-shot mode 9 Outputs for a fixed period DIR. after the rising edge of the detection 1 Signal input selector signal. (NOR.: Inputs when ON; INV.: Inputs when OFF) Timer period selector 5 2 Synchronous input selector 1s: variable between 0.05 and 1 second (NOR.: Inputs when ON; INV.: Inputs when OFF) 10s: variable between 0.5 and 10 seconds 3 Synchronous edge detection selector Timer setting trimmer 6 7 Signal input indicator 2 3 Synchronous Synchronous input selector edge detection 8 Synchronous input indicator NOR. INV. NOR. INV. selector 9 Output indicator (Thick line indicates synchronous input periods.) Connections Connecting 3-wire sensor(s) Connecting 2-wire sensor(s) Connecting one sensor to the CU Connecting one sensor to the CU (Use the supplied Blue Blue Blue Blue (Use the supplied short-circuit bar to short-circuit bar to Black Black Brown Brown Sensor Sensor Sensor Sensor connect terminals connect terminals Brown Brown 11 and 12) 11 and 12) Set the synchronous Set the synchronous input (In2) selector input (In2) selector 10 11 12 10 11 12 11 12 11 12 10 10 switch to "INV" switch to "INV" 78 9 78 9 78 9 789 45 6 456 45 6 45 6 12 3 12 3 12 3 12 3 CU-21TA CU-21A CU-21TA CU-21A Connecting two sensors to the CU in an AND logic Connecting two sensors to the CU in an AND logic Blue Blue Blue Blue Black Black Sensor 1 Sensor 1 Sensor 1 Brown Sensor 1 Brown Brown Brown Blue Blue Blue Blue Black Black 11 12 11 12 10 11 12 10 11 12 Sensor 2 10 Sensor 2 10 Sensor 2 Sensor 2 Brown Brown Brown Brown 78 9 78 9 78 9 78 9 45 6 45 6 45 6 45 6 123 12 3 12 3 12 3 CU-21TA CU-21A CU-21TA CU-21A 270 MAIN MENU PRODUCTS APPLICATIONS INDEX SELECTION GUIDE Control Units CU Connecting two or more sensors to the CU in an OR logic Blue (Use the supplied short-circuit bar to Black Sensor 1 Sensor 1 connect terminals Brown 11 and 12) Blue Black 10 11 12 10 11 12 Sensor 2 Sensor 2 Brown 78 9 78 9 Set the synchronous input (In2) selector switch to "INV" 45 6 45 6 123 12 3 CU-21TA CU-21A Dimensions CAD data Unit: mm Inch CU-21TA/CU-21A 7 0.28" 2.83" 72 80 35.4 (mounting 3.15" 1.39" pitch) 71 2.80" ş5 mounting hole 30 75 2.95" 1.18" ş0.20" 271