MINI-BEAM SMA31E/SM2A31R and SMA31EL/SM2A31RL Self-contained AC-operated Opposed Mode Sensors Compact, self-contained opposed mode modulated infrared sensor pairs for 24-240V ac operation Standard sensor pairs have 3 m (10 ft) range Long range sensor pairs have 30 m (100 ft) range Switch-selectable for light operate or dark operate Highly repeatable, 2 millisecond response on/1 millisecond off response SPST solid state SCR output switches up to 300mA low leakage current and saturation voltage Rugged, epoxy-encapsulated construction: meets NEMA standards 1, 2, 3, 3S, 4, 4X, 12 and 13 IEC IP67 Physically and electrically interchangeable with 18 mm barrel-type photoelectrics Infrared, 880 nm MINI-BEAM Opposed Mode Emitter (E) and Receiver (R) Supply Output Models Range Cable Voltage Type Excess Gain Beam Pattern 1000 SMA31E & SM2A31R E SMA31E & SM2A31R X 300 mm 12.0 in Opposed Mode C Opposed Mode 200 mm 8.0 in 100 E 100 mm 4.0 in SMA31E 2 m (6.5 ft) S SPST S 0 0 SM2A31R 3 m 2 m (6.5 ft) 24-240V ac Solid-state 100 mm 4.0 in 10 G SMA31EQD (10 ft) 3-Pin Micro QD 200 mm 8.0 in A 2-Wire SM2A31RQD 3-Pin Micro QD I 300 mm 12.0 in N 1 0 .6 m 1.2 m 1.8 m 2.4 m 3.0 m .01 m .10 m 1.0 m 10 m 2 ft 4 ft 6 ft 8 ft 10 ft .033 ft .33 ft 3.3 ft 33 ft DISTANCE DISTANCE 1000 SMA31EL & SMA31EL & SM2A31RL E SM2A31RL 750 mm 30.0 in X Opposed Mode Opposed Mode 500 mm 20.0 in C 100 E 250 mm 10.0 in SMA31EL 2 m (6.5 ft) S SPST 0 0 SM2A31RL 30 m 2 m (6.5 ft) S 250 mm 10.0 in 24-240V ac Solid-state SMA31ELQD (100 ft) 3-Pin Micro QD 10 G 500 mm 20.0 in 2-Wire A SM2A31RLQD 3-Pin Micro QD 750 mm 30.0 in I N 0 6 m 12 m 18 m 24 m 30 m 1 20 ft 40 ft 60 ft 80 ft 100ft .1 m 1.0 m 10 m 100 m .33 ft 3.3 ft 33 ft 330 ft DISTANCE DISTANCE For Standard MINI-BEAMs: i) 9 m (30 ft) cables are available by adding suffix W/30 to the model number of any cabled sensor (e.g. - SMA31EL W/30). ii) A 150 mm (6 in.) long pigtail cable with attached QD connector is available by adding suffix QDP to the model number of any MINI-BEAM sensor (e.g. - SMA31ELQDP). See page 5 for more information. iii) A model with a QD connector requires an accessory mating cable. See page 8 for more information. Printed in USA P/N 03561L7B MINI-BEAM Sensors SMA31E/SM2A31R and SMA31EL/SM2A31RL MINI-BEAM Installation and Alignment Proper operation of the sensors requires that they be mounted securely and aligned properly. Excessive movement or vibration can cause intermittent or false operation due to loss of Opposed Mode Alignment alignment. For maximum mechanical stability, final-mount these sensors in 18-mm holes by their threaded barrels or use a mounting bracket (see page 6). 1) Begin with the emitter mounted securely in place. For small-parts counting applications, stretch a string Receiver between the emitter and receiver lenses to ensure that the Emitter sensing beam will pass through the center of the sensing location. For less critical applications, the receiver may be initially positioned by line-of-sight placement. Mount the receiver, leaving a means for movement. 2) Set the receiver to light-operate mode. Apply power to the emitter and receiver, and advance the receivers 15-turn GAIN control to maximum (clockwise end of rotation). The GAIN control is clutched at both ends to avoid damage, and will free-wheel when either end point is reached. If the receiver is seeing the emitters light beam, the receiver alignment LED should be on. Move the receiver up-down-right-left (include angular rotation) to locate the center of the movement range within which the LED stays lit. Reducing the GAIN setting will restrict the range of Receiver 15 Turn motion and allow precise positioning. NOTE: to aid Gain alignment at short ranges, it may help to further reduce Adjustment and Light/Dark the strength of the light signal by temporarily masking the Operate Switch* emitter and/or receiver lens with tape or a sheet of paper. Gasketed 3) Repeat the alignment motions after each GAIN reduction. Acrylic Cover When you have found the center of the movement range, mount the receiver solidly in that position. Remove any Red LED lights when the sensor s output is conducting. masking material, and increase the receiver GAIN to maximum. Test the system by placing the object to be detected into the sensing position. The receiver LED indicator should go off. (If it does, alignment is complete, and you may now switch the sensor to dark- operate if the application requires it.) If the LED does not go off, the cause is probably either flooding or burn- through. * Note regarding Light/Dark operate switch: Flooding occurs when a portion of the effective beam passes around the object to be sensed and activates the Turn switch fully clockwise for light operate (sensor receiver. Check that the object completely breaks the outputs conduct when object is absent) beam, and that the beam is centered on the object. Add Turn switch fully counterclockwise for dark operate apertures, if necessary, to tailor the effective beam to the (sensor outputs conduct when object is present and size or profile of the object being sensed. Burn-through blocking light beam) refers to a portion of the emitters light energy passing through a thin or translucent object and activating the receiver. Try sensing at a reduced GAIN setting or consider an alternative sensing scheme. page 2 Up Left Right Down