PSAC0000 Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – MODEL PSAC - 3-WIRE INDUCTIVE PROXIMITY SENSOR WITH CURRENT SINK OUTPUT

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Bulletin No. PROX-E
Drawing No. LP0019
Released 9/03
MODEL PSAC - 3-WIRE INDUCTIVE PROXIMITY SENSOR WITH CURRENT SINK OUTPUT
O SENSE FERROUS AND NON-FERROUS METAL OBJECTS
O OPERATES FROM ZERO TO 5 KHZ PULSE OUTPUT RATE
O SENSES TARGETS AS SMALL AS 12 D.P. GEAR TEETH
O IDEAL FOR TACHOMETER, COUNTER AND CONTROL INPUT
DESCRIPTION
The PSAC contains a sensing coil, oscillator, and Schmidt trigger pulse-
shaper with an NPN Open Collector output that is compatible with most Red
Lion Controls’ Motion Monitors, Counters, and Controls. This sensor has a
maximum sensing distance of 0.059" (1.5 mm) and can detect ferrous and non-
ferrous metal targets from zero speed to 5 KHz.
The 0.25" diameter pole piece is epoxy encapsulated in a stainless steel case
measuring 0.75" Dia. x 3.5" L and is supplied with a 10, 25 or 50 ft., 3-wire,
shielded cable. Overall dimensions, including the neoprene strain-relief boot
are 0.90" Dia. x 4.5" L. The NPN O.C. output has internal current limiting at 40
mA. Operating temperature range is -18° to +60°C.
SPECIFICATIONS
1. SUPPLY VOLTAGE: +12 VDC @ 20 mA max.; Reverse Polarity Protected.
2. MAXIMUM SWITCHING FREQUENCY: 5 KHz
3. OUTPUT: NPN Open Collector Transistor;
V_OH = 30 VDC max.; V_OL = 1 V max @ 40 mA.
Output current is limited to 40 mA.
4. MAXIMUM SENSING DISTANCE: 0.059" (1.5 mm)
5. OUTPUT CABLE: Integrally potted 10, 25, or 50 ft. PVC jacketed 3-wire
22 AWG conductors with stranded shield and 100% foil shield coverage.
RED = +VDC, BLK = Common, WHT = NPN O.C. Output
6. OPERATING TEMPERATURE RANGE: -18°C to +60°C (0°F to
+140°F)
7. CONSTRUCTION: Epoxy Encapsulated 0.25" dia. sensor in 0.750"
±0.005" dia. #304 stainless steel case.
PSAC APPLICATION
PSAC application depends on the size, material, and spacing of the targets
being sensed and the sensing distance that can be maintained. The maximum
sensing distance is defined as that distance where the sensor is just close enough
to detect a ferrous target whose diameter is equal to or greater than the sensor
diameter. For the PSAC, the internally potted sensor diameter is 0.25". In an
actual application the sensing distance should be between 50-70% of the
maximum to assure reliable detection. For target sizes smaller than the 0.25"
sensor diameter, the maximum sensing distance can be estimated from the
curve in Fig. 2. A further reduction factor must also be applied if the target
material is a non-ferrous metal as shown in Fig. 3.
Ideally, spacing between adjacent targets should be at least 0.25" so that the
first target completely leaves the sensors’ viewing 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 a bit
more critical
The PSAC is internally shielded which allows the sensor face to be flush
mounted in metal applications without reducing sensing distance.
MAXIMUM SENSING DISTANCE REDUCTION FACTORS
Reduction in the max. sensing distance
due to decrease in diameter of ferrous
targets.
Typical reduction factors for various
nonferrous targets with diameters equal to
or greater than sensor diameter.
Figure 1
3/4" DIAMETER CYLINDRICAL SENSOR MOUNTING
The PSAC and other Red Lion
Controls 3/4" dia. cylindrical
BLOCK MOUNT
pickups may be easily mounted
using Model 5400100 BLOCK
MOUNT (see diagram at right).
This machined block of solid
aluminum provides for rigid
mounting using the 2 included #8-
32 x 1/2" screws. The one screw
split-clamp design allows for easy
adjustment of airgap and locks the
unit securely without deforming
the case. Alternative plug mounts
For 3/4" cylindrical sensors
Qty. 2 #8-32 x 1/2" Mounting screws included
P/N 5400100
available. See Model LMP for
details.
Figure 2
Figure 3
DIMENSIONS [In inches (mm)]
PSAC
ORDERING INFORMATION
MODEL NO. DESCRIPTION
NPN O.C. Proximity Sensor, 10 ft. Cable
PSAC NPN O.C. Proximity Sensor, 25 ft. Cable
NPN O.C. Proximity Sensor, 50 ft. Cable
Block Mount
PART NUMBER
PSAC0000
PSAC0025
PSAC0050
5400100