PSA20000

Bulletin No. PSA-H Drawing No. LP0238 Released 05/13 Tel +1 (717) 767-6511 Fax +1 (717) 764-0839 www.redlion.net INDUCTIVE PROXIMITY SENSORS     SENSE FERROUS & NON-FERROUS METAL OBJECTS TO “ZERO SPEED” 2-WIRE CURRENT SOURCE & 3-WIRE NPN OPEN COLLECTOR & LOADED COLLECTOR TRANSISTOR OUTPUTS 3 SIZES & 3 SENSING DISTANCES FOR APPLICATION VERSATILITY L.E.D. TARGET INDICATOR (PSA 7A & 8A) DESCRIPTION & OPERATION PSA-1 & PSA-2 SPECIFICATIONS Inductive Proximity Sensors detect the presence of metal objects which come within range of their oscillating field and provide target detection to “zero speed”. Internally, an oscillator creates a high frequency electromagnetic field (RF) which is radiated from the coil and out from the sensor face (See Figure 1). When a metal object enters this field, eddy currents are induced into the object. As the metal moves closer to the sensor, these eddy currents OSC. increase and result in an CIRCUIT absorption of energy from the coil which dampens the oscillator amplitude until it finally stops. METAL TARGET 1. 2. 3. 4. 5. 6. 7. PSA-2 DIMENSIONS In inches (mm) PSA-1 SENSING FIELD TARGET APPROACHING SENSOR TARGET ABSENT PSA-1 Power Supply: +5 to +25 VDC Maximum Switching Frequency: 5 KHz 300 Hz Output: Less than 1 mA Target Sensed; Greater than 3 mA No Target. Maximum Sensing Distance: 0.06" (1.5 mm) 0.4" (10 mm) Wire Color Code: Black or Brown = +VDC; Blue = Count Operating Temperature: -25°C to +70°C (-14°F to +158°F) Construction: NEMA 1, 2, 3, 3R, 4, 4X, 5, 6, 6P, 12, and 13. .25 (6.5) DIA. AMPLITUDE .87 (22) 6.56 (2 METERS) OSCILLATOR STALLED > 3mA STAINLESS STEEL CASE < 1mA ] PSA1, or 2 OUTPUT PSA-2 ] PSA 7A or 8A OUTPUT OUTPUT ON OUTPUT OFF M30 x 1.5 PVC JACKET 1.57 (40) 1.36 (34.5) Figure 1 6.56 (2 METERS) PVC JACKET #19 AWG 2-CONDUCTORS MODELS PSA-1 & 2 The 2-wire Models PSA-1 and 2 contain only the coil and oscillator circuit (See Figure 2). With no metal object being sensed, the circuit oscillates and draws greater than 3 mA of supply current. As a metal object of sufficient size is brought into the sensing field, the oscillator amplitude dampens and finally stops, resulting in less than 1mA of circuit current being drawn. This greater than 3 mA to less than 1 mA change in circuit current between oscillating and non-oscillating conditions is converted into a usable voltage signal (VS) by placing a resistor (RS) in series with the sensor leads. 1.09 (27.8) DIA. PSA 1,2 METAL TARGET BLK OR BRN COIL OSC. CIRCUIT +VDC > 3mA-NO METAL < 1mA-METAL SENSED CNT. BLUE Rs Vs Figure 2 1 .04 (1) 1.42 (36) ACROSS FLATS .19 (5) THICKNESS SELECTION & APPLICATION OF PROXIMITY SENSORS In addition to the coil and oscillator circuit, the 3-wire Models PSA-7A and 8A each contain a Detector Circuit and NPN Transistor Output (See Figure 3). In these units, the Detector Circuit senses when the oscillator stops, and turns on the Output Transistor which controls the load. The Detector Circuit also turns on an integrally case mounted L.E.D., visually indicating when a metal object is sensed. Selection of the proper proximity sensor depends on the size, material, and spacing of the target being sensed and the sensing distance that can be maintained. The maximum sensing distance is defined as the distance in which the sensor is just close enough to detect a ferrous target whose diameter is equal to or greater than the sensor diameter. In actual application, the sensing distance should be between 50 to 80% of the maximum sensing range to assure reliable detection. For target sizes smaller than the sensor diameter, the maximum sensing distance can be estimated from the curve (See Figure 4). A further reduction factor must also be applied if the target material is non-ferrous metal (See Figure 5). Ideally, spacing between adjacent targets should be at least one sensor diameter so that the first target completely leaves the sensors field before the next target appears. Individual targets can still be resolved as separate objects if this spacing is reduced to 70 or 75% of the sensor diameter, however, this can introduce a minimum limit on sensing distance that makes adjustment more critical. All Proximity sensors are internally shielded which allows the sensor face to be flush mounted in metal applications without reducing sensing distance. In applications where proximity sensor’s must be placed next to each other, a distance of at least 1 sensor diameter should separate sensors to eliminate any frequency interference (See Figure 6). PSA 7A or 8A +VDC METAL TARGET LED COIL OSC. CIRCUIT DETECTOR OUTPUT TRANSISTOR OUTPUT COMMON Figure 3 PSA-7A & 8A These Inductive Proximity Sensors have a maximum sensing distance of 0.2" (5 mm) and 0.4" (10 mm) respectively, and operate over a wide power supply range (See Specifications Below). They are each housed in threaded stainless steel cases and are supplied with 2 stainless steel jam nuts for mounting. The NPN transistor outputs have an internal pull-up resistor and are compatible with most RLC counter and rate input circuits. Maximum sensing frequencies are 1 KHz and 100 Hz respectively. In addition, the outputs are overload and short circuit protected. These sensors are shielded for flush mounting in metal applications. MAXIMUM SENSING DISTANCE REDUCTION FACTORS Reduction in the max. sensing distance due to decrease in diameter of ferrous targets. PSA-7A & 8A SPECIFICATIONS 1. Power Supply: +10 to 30 VDC @ 15 mA max. REVERSE POLARITY PROTECTION 2. Maximum Switching Frequency: 3. Output: 1 KHz 100 Hz NPN Loaded Collector Transistor, Overload Short Circuit protected. 4. Maximum Sensing Distance: 0.2" (5 mm) 5. Wire Color Code: Brown = +VDC; Blue = Common; Black = Output 6. Operating Temperature: -25°C to +70°C (-14°F to +158°F) 7. Construction: 50 MILD STEEL 100% STAINLESS STEEL APPROX. 65% APPROX. 60% MERCURY APPROX. 50% LEAD APPROX. 40% BRASS 0 0 VSAT = 3 V @ 100 mA max. load % SENSING DISTANCE MATERIAL 100 PSA-8A % OF MAX. SENSING DISTANCE PSA-7A Typical reduction factors for various nonferrous targets with diameters equal to or greater than sensor diameter. .25 RATIO, 0.4" (10 mm) .5 .75 APPROX. 30% ALUMINUM 1 TARGET DIAMETER SENSOR DIAMETER APPROX. 25% COPPER Nominal sensing range x % sensing Figure 5 distance = actual sensing range Figure 4 MINIMUM SENSOR SPACING NEMA 1, 2, 3, 3R, 4, 4X, 5, 6, 6P, 12, and 13 D 1xD D DIMENSIONS In inches (mm) Figure 6 PSA-7A 6.56 (2 METERS) LED #19 AWG 3-CONDUCTORS .94 (24) ACROSS FLATS .16 (4) THICKNESS PSA-8A COUNTER #1 6.56 (2 METERS) +VDC PSA 7A or 8A NPN LOADED COLLECTOR LO BIAS SRC 2 3 * HI 1 * APPLICATION DEPENDENT HI CNT. COUNTER #2 TYPICAL COUNTER INPUT SWITCH SET-UP OUTPUT COMMON 2 COMM. C A +12V B COMM. C CNT. 1 LO BIAS NOTES: 1. PSA 7A & 8A case and jam nut material = brass nickel plated. 2. Polyurethane Cable Jacket. +12V B LO FRQ 1.42 (36) ACROSS FLATS .19 (5) THICKNESS A SNK Counter #1 and #2 both contain unregulated +12 VDC Power Supplies and may be connected in parallel (as shown). SRC LED LO FRQ TYPICAL COUNTER INPUT SWITCH SET-UP #19 AWG 3-CONDUCTORS 2 3 HI 1.97 (50) M30 x 1.5 HI 1.97 (50) SNK M18 x 1 Note: PSA-7A, and 8A outputs are NPN loaded collector outputs which contain an internal load resistor that is returned to +VDC for internal feedback purposes. This does not interfere with the ability to use these sensors as conventional “Open Collector” outputs, as long as the +VDC for the proximity sensor is supplied by the indicator or control receiving its output signal. A PSA-7A, or 8A may be used as an input to more than 1 indicator or control only if the respective power supplies are “unregulated” and can load share. These supplies may then be paralleled together as shown. An indicator or control with a regulated power supply may not be paralleled. * * APPLICATION DEPENDENT TYPICAL HOOK-UPS +12V B COMM. C CNT. LO BIAS A LO FRQ PSA 7A or 8A = BLU * APPLICATION DEPENDENT SRC 3 * 2 3 HI 2 1 HI CNT. LO BIAS C LO FRQ COMM. PSA 7A or 8A = BLK NPN LOADED COLLECTOR HI B HI +12V SNK BLUE A SRC BLK or BRN < 1mA > 3mA CURRENT SOURCE TYPICAL COUNTER INPUT SWITCH SET-UP PSA 7A or 8A 1 SNK PSA 1 or 2 PSA 7A or 8A = BRN TYPICAL COUNTER INPUT SWITCH SET-UP * APPLICATION SELECTION CHART MAX. SENSING DISTANCE MAX. SWITCHING FREQ. POWER SUPPLY OUTPUT L.E.D. TARGET INDICATOR PSA-1 PSA-2 0.06" (1.5 mm) 5 KHz 5-25 VDC 3 mA No 0.40" (10 mm) 300 Hz 5-25 VDC 3 mA No PSA-7A PSA-8A 0.20" (5 mm) 0.40" (10 mm) 1 KHz 100 Hz 10-30 VDC 10-30 VDC NPN Loaded Collector Transistor Yes Yes MODELS MB4 & 5 MOUNTING BRACKETS DIMENSIONS B C A D The Models MB4 and 5 are stainless steel right angle mounting brackets, designed to provide easy mounting and adjustment of PSA-7A and 8A respectively, using the 2 hex jam nuts provided with each sensor. E F H G K J I DIMENSIONS In inches (mm) BRACKET SENSOR MODEL MODEL NO. SENSOR HOLE DIAMETER A B C 1.38" (34.92) 2.00" (50.80) 0.69" (17.5) 1.00" (25.40) BRACKET SENSOR MODEL MODEL NO. F G MOUNTING DIA. (2) PLACES H MB4 MB5 MB4 MB5 PSA-7A PSA-8A 0.75" (19.1) 1.22" (31) PSA-7A PSA-8A 0.875" (22.2) 1.25" (31.7) 0.25" (6.3) 0.37" (9.5) 0.19" (4.8) 0.25" (6.3) D 0.78" (19.8) 1.45" (36.9) I 1.00" (25.4) 1.50" (38.1) ORDERING INFORMATION MODEL NO. PSA1 PSA2 PSA7A PSA8A MB4 MB5 DESCRIPTION PART NUMBER 2-Wirer Cylindrical Proximity Sensor 2-Wire, 30 mm Threaded Proximity Sensor 18mm Threaded Proximity Sensor 30mm Threaded Proximity Sensor Mounting Bracket for PSA7 Mounting Bracket for PSA8 Do not dispose of unit in trash - Recycle 3 PSA10000 PSA20000 PSA7A000 PSA8A000 MB400000 MB500000 E 1.50" (38.1) 2.50" (63.5) J 0.22" (5.6) 0.37" (9.5) K 0.12" (3.2) 0.12" (3.2) * APPLICATION DEPENDENT LIMITED WARRANTY The Company warrants the products it manufactures against defects in materials and workmanship for a period limited to two years from the date of shipment, provided the products have been stored, handled, installed, and used under proper conditions. The Company’s liability under this limited warranty shall extend only to the repair or replacement of a defective product, at The Company’s option. The Company disclaims all liability for any affirmation, promise or representation with respect to the products. The customer agrees to hold Red Lion Controls harmless from, defend, and indemnify RLC against damages, claims, and expenses arising out of subsequent sales of RLC products or products containing components manufactured by RLC and based upon personal injuries, deaths, property damage, lost profits, and other matters which Buyer, its employees, or sub-contractors are or may be to any extent liable, including without limitation penalties imposed by the Consumer Product Safety Act (P.L. 92-573) and liability imposed upon any person pursuant to the Magnuson-Moss Warranty Act (P.L. 93-637), as now in effect or as amended hereafter. No warranties expressed or implied are created with respect to The Company’s products except those expressly contained herein. The Customer acknowledges the disclaimers and limitations contained herein and relies on no other warranties or affirmations. Red Lion Controls Headquarters 20 Willow Springs Circle York PA 17406 Tel +1 (717) 767-6511 Fax +1 (717) 764-0839 Red Lion Controls Europe Softwareweg 9 NL - 3821 BN Amersfoort Tel +31 (0) 334 723 225 Fax +31 (0) 334 893 793 Red Lion Controls India 201-B, 2nd Floor, Park Centra Opp 32 Mile Stone, Sector-30 Gurgaon-122002 Haryana, India Tel +91 984 487 0503 Red Lion Controls China Unit 302, XinAn Plaza Building 13, No.99 Tianzhou Road ShangHai, P.R. China 200223 Tel +86 21 6113 3688 Fax +86 21 6113 3683