E2K-C E2K-C Adjustable Capacitive Prox E2K-C Cylindrical Sensor Offers Adjustable Detecting Distance ■ Permits non-contact detection of metallic and non-metallic objects such as glass, wood, water, oil and plastic ■ Allows indirect detection of materials inside non-metallic containers ■ Adjustable detecting distance from 3 to 25 mm ■ Built-in amplifier accepts wide range of supply voltages and switches up to 200 mA ■ Mounting bracket included Ordering Information ■ SENSORS Type Unshielded Nominal detecting distance Output type Part AC switching type (SCR) number DC switching NPN type PNP 3 to 25 mm (0.12 to 0.98 in), adjustable NO NC E2K-C25MY1 E2K-C25MY2 E2K-C25ME1 E2K-C25ME2 E2K-C25MF1 E2K-C25MF2 ■ REPLACEMENT PARTS Description Part number Mounting bracket for E2K-C (supplied with sensor) Y92E-A34 2 E2K-C E2K-C Specifications Part number Sensor type Body E2K-C25M❑❑ Capacitive 34 mm (1.34 in) diameter Unshielded 10 to 40 VDC, 10% max. permissible ripple peak to peak E2K-C25MY❑ Current consumption 10 mA max. at 12 VDC 15 mA max. at 24 VDC 1 mA max. at 100 VAC 2 mA max. at 200 VAC Detectable object type Sensitivity Metallic and non-metallic objects Adjustable Effective maximum detecting distance (with standard target) 3 to 25 mm (0.12 to 0.98 in) Standard target size (grounded mild steel, L x W x H) Differential travel 50 x 50 x 1 mm (2.0 x 2.0 x 0.04 in) 15% max. of detecting distance Size Type Supply voltage Control output AC solidstate DC solidstate Type — Max. load Min. load Max. off-state leakage current Max. on-state voltage drop Type — — — Mounting Connections Weight with cable Enclosure ratings SCR-NO (E2K-C25MY1) SCR-NC (E2K-C25MY2) 200 mA 5 mA See “Leakage Current Characteristics” graph in Engineering Data 2V max. — NPN-NO open collector with pull-up NPN-NC open collector with pull-up PNP-NO open collector with pull-down PNP-NC open collector with pull-down 200 mA See “Residual Load Voltage” graph in Engineering Data 70 Hz Not provided — DC power supply reverse polarity Provided Not provided Weld field immunity RFI immunity Not provided Not provided Target Present (red LED) Output Operation (red LED) ABS/PC ABS PVC Bracket Y92E-A34 included Three-conductor cable, 2 m (6.56 ft) length Two-conductor cable, 2 m (6.56 ft) length Approx. 200 g (7.0 oz.) 1 1, 4, 12, 13 IP67 — Listed, File Number E76675 — Certified, File Number LR45951 –25° to 70°C (–13° to 158°F) 10 to 55 Hz, 1.5 mm (0.06 in) double amplitude Approx. 50 G's Max. load Max. on-state voltage drop Response frequency Output shortCircuit circuit protection Indicators Materials 90 to 250 VAC, 50/60 Hz Housing Sensing face Cable sheath Prewired UL NEMA IEC 144 Approvals UL CSA Ambient operating temperature Vibration Shock 3 — — 10Hz E2K-C E2K-C Operation ■ OUTPUT CIRCUIT DIAGRAMS AND TIMING CHARTS DC Switching Types E2K-C25MF ❑ The dotted line shows a transistor circuit load. E2K-C25ME❑ The dotted line shows a transistor circuit load. 22 Ω Brown (Red) Brown (Red) +V D2 Prox. switch main circuit Black (White) +V ZD 2.2 Ω Tr ZD Blue (Black) Tr Black (White) Prox. switch main circuit D2 22 Ω Load D1 Load 4.7 KΩ Blue (Black) 4.7 KΩ 0V 0V 2.2 Ω D 1 Note: IEC colors are shown in parentheses. E2K-C25ME1 NO Target E2K-C25ME2 NC E2K-C25MF1 NO Present Target Absent Load (between red and white) Present Absent Operates Releases Load (between Operates white and black) Releases Logic (between H white and black) L ON Operation indicator OFF Logic (between red and white) Operation indicator H L ON OFF AC Switching Types E2K-C25MY❑ Present Absent Target White (Black) Load Prox. switch main circuit NO Operates Releases NC Operates Releases Load Operation indicator Black (Blue) NO NC Note: IEC colors are shown in parentheses. 4 ON OFF ON OFF E2K-C25MF2 NC E2K-C E2K-C Engineering Data Operating Range E2K-C25MY1 Detecting distance X (mm) Standard X target Detecting30 head Y 25 Setting distance 25mm 20 20mm 15 15mm 10 10mm 5 5mm 25 20 15 10 5 0 5 10 15 20 25 Y (mm) Detecting head Detecting Distance vs. Size and Material of Target Detecting Distances of Common Materials 30 Detecting distance X 20 ❑ Grounded mild steel t = 1 mm Ungrounded mild steel t = 1 mm 15 10 Phenolic resin plate t = 6 mm 5 20 15 10 5 5 Plastic resin pellets Soft wood (160 x 120 x 15 mm) Glass (200 x 50 x 3 mm) (mm) Neoprene rubber (50 x 50 x 5 mm) Size of target 80 90 100 Phenolic resin (50 x 50 x 50 mm) 60 70 Salt 50 Sugar 30 40 Flour 20 Milk (500 ml) 0 10 Grounded mild steel (50 x 50 x 1 mm) 0 25 Detecting distance X (mm) Detecting distance X (mm) 25 E2K-C E2K-C Residual Load Voltage Characteristics DC switching types E2K-C25M❑❑ AC switching types E2K-C25MY❑ 24VDC 100 VAC 200 VAC 1 24 VDC 0.1 0.05 OFF (V1) R< = P i VS 50 VS 100 150 200 Load current (mA) P> (kΩ) 100 90 80 70 60 50 40 30 250 VS 2 Residual output voltage 200 ON Load AC 100V OFF 10 50 100 200 Load current (mA) Leakage Current Characteristics AC switching types E2K-C25MY❑ 3.0 Leakage current (mA) 2.5 2.0 1.5 1.0 0.5 OFF state 0 0 80 100 120 140 160 180 200 220 240 260 Supply voltage (V) Dimensions Unit: mm (inch) ■ SENSORS E2K-C25M❑❑ 20 (0.79) 150 Load 100 AC 200V Residual load voltage OFF 0 1 5 10 50 100 200 Load current (mA) Note: When the current rating of the load is less than 10 mA, false operation may occur. This is normal, and the problem can be cured by installing a bleeder resistor in parallel with the load. Use the formulas given here to calculate the power rating and value of the resistor. (mW) 10 – i R : Power rating of bleeder resistor : Load current (mA) : Supply voltage (V) 82 (3.23) ON 50 20 Residual 10 load voltage 0 1 5 0.01 0 Residual output voltage Load voltage (V) Load voltage (V) 0.5 Load voltage (V) ON (V2) 31 (1.22) Cap screw for sensitivity adjustment 6 (0.24) 34 (1.34) dia. 0.15 (0.006) Cable: 2 m (6.56 ft.) length Note: Cable may be extended to 200 m (656 ft). 6 Operation indicator (LED) E2K-C E2K-C Unit: mm (inch) ■ MOUNTING BRACKET Y92E-A34 (supplied with sensor) 45 (1.77) 5.2 (0.20) 43 (1.69) 6.3 (0.25) Two elliptic holes for bracket mounting 2 (0.08) 35 (1.38) 23.5 (0.93) 15 (0.59) R2.6 (0.102) 42 (1.65) 55 (2.16) Two M4 sensor clamping screws E2K-C proximity sensor Sensor mounting hole 51 (2.01) 30 (1.18) 14 (0.55) 6 (0.24) 45 (1.77) 58 (2.28) Two 5.5 (0.22) dia. mounting holes 35 (1.38) Precautions ■ EFFECTS OF SURROUNDING METALS ■ MUTUAL INTERFERENCE When mounting the sensor, be sure to provide the minimum distance shown in the diagram. This prevents the sensor from being affected by metallic objects other than the target. Also, when using the supplied mounting bracket, be sure to allow a distance of 20 mm or more between the detecting face and the mounting bracket. To prevent mutual interference, be sure to space the two sensors at a distance greater than that shown in the diagrams. Opposed mounting 20 (0.79) 80 (3.15) mm min. mm min. 100 (3.94) mm min. Surrounding conductive object Detecting face Parallel mounting Metal To ground 100 (3.94) mm min. 80 (3.15) mm min. 80 (3.15) mm min. Surrounding conductive object 80 (3.15) mm min. 7 E2K-C E2K-C ■ SENSITIVITY ADJUSTMENT ■ USING METAL CONDUIT NO type (E2K-C25M❑1) If a high voltage of power line runs near the proximity sensor cable, be sure to wire the sensor cable through a metal conduit to protect the sensor from malfunctioning or damage. Remove protective rubber plug to gain access to sensitivity adjustment screw. Use the screwdriver provided with each sensor to turn the sensitivity adjustment screw. ■ SURGE PROTECTION The proximity sensor is provided with a surge suppressor circuit. However, if any large surge generating source (i.e., motor, welding machine, etc.) exists in the vicinity of the proximity sensor, insert a surge suppressor (such as a varistor) into the surge generating source. 1) Remove any targets from in front of the sensor. Turn the sensitivity adjustment screw CLOCKWISE until the sensor turns ON and the indicator illuminates. Sensitivity adjustment Stop when the sensor turns ON 2) Place a target in front of the sensor. Turn the sensitivity adjustment screw COUNTERCLOCKWISE until the sensor turns OFF and the indicator goes out. Note the number of revolutions between OFF and ON positions. Sensitivity adjustment Stop when the sensor turns OFF 3) If the number of revolutions is greater than one and a half, the sensor will provide stable output. If the number of revolutions is less than one and a half, increase or decrease the distance between the target and the sensing face as necessary to allow at least one and a half revolutions between the ON and OFF positions. 1 ON point Stable operation if the difference is more than 1.5 turns 2 4) Now turn the sensitivity adjustment screw CLOCKWISE to the midpoint between the ON and OFF points. 1 ON point Set at midpoint 1 between ON and OFF points 2 OFF point 5) If the distance between the target and the sensor is not constant, perform the first adjustment operation (#1) when the target is at the closest position to the sensor. Then perform the second adjustment operation (#2) when the target is at the farthest position from the sensor. NC type (E2K-C25M❑2) The sensitivity adjustment procedure for NC type proximity sensors is the same as for NO type sensors, with the exception that ON and OFF operations of the proximity sensor and ON and OFF points in the adjustment procedure are exactly reversed. 8 E2K-C E2K-C OMRON ELECTRONICS LLC OMRON ON-LINE OMRON CANADA, INC. One East Commerce Drive Schaumburg, IL 60173 Global - http://www.omron.com USA - http://www.omron.com/oei Canada - http://www.omron.com/oci 885 Milner Avenue Scarborough, Ontario M1B 5V8 1-800-55-OMRON Cat. No. CEDSAX4 11/01 Specifications subject to change without notice. 416-286-6465 Printed in the U.S.A.