Red Lion PSAC User Manual

51

Bulletin No. PROX-J

Drawing No. LP0019

Released 03/13

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MODEL PSAC - 3-WIRE INDUCTIVE PROXIMITY SENSOR WITH
CURRENT SINK OUTPUT



SENSE FERROUS AND NON-FERROUS METAL OBJECTS



OPERATES FROM ZERO TO 5 KHZ PULSE OUTPUT RATE



SENSES TARGETS AS SMALL AS 12 D.P. GEAR TEETH



IDEAL FOR TACHOMETER, COUNTER AND CONTROL INPUT

DESCRIPTION

The PSAC offers a 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 non­ferrous 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,
cable. Overall dimensions, including the neoprene strain-relief boot are 0.90"
Dia. x 4.5" L. Operating temperature range is -25 ° to +70 °C.

SPECIFICATIONS

1. SUPPLY VOLTAGE: +10 - 30 VDC @ 20 mA max.; Unit is not Reverse

Polarity Protected.

2. MAXIMUM SWITCHING FREQUENCY: 5 KHz

3. OUTPUT: NPN Open Collector Transistor;

VOH = 30 VDC max.; VOL = 1 V max @ 150 mA.

4. MAXIMUM SENSING DISTANCE: 0.059" (1.5 mm)

5. OUTPUT CABLE: Integrally potted 10, 25, or 50 feet ± 6 inches; PUR

jacketed 3-wire 24 AWG conductors.

BROWN = +VDC, BLUE = Common, BLACK = NPN O.C. Output

6. OPERATING TEMPERATURE RANGE: -25 °C to +70 °C (-13 °F to

+158 °F)

7. CONSTRUCTION: Epoxy Encapsulated 0.25" dia. sensor in 0.750"

±0.005" dia. #304 stainless steel case.

DIMENSIONS In inches (mm)

PSAC

FLUSH MOUNT
.25 DIA.
POLE PIECE

304 S.S. CASE
.750±.005 DIA.

NEOPRENE STRAIN
RELIEF BOOT

3.5 (88.9)

4.5 (114.3)

WIRE COLOR CODE
BROWN = +VDC
BLUE = COMMON
BLACK = NPN O.C. OUTPUT

.9 (22.9) DIA.

10 FT. 3-WIRE CABLE

INTEGRALLY POTTED

ORDERING INFORMATION

MODEL NO. DESCRIPTION PART NUMBER

PSAC

NPN O.C. Proximity Sensor, 10 ft. Cable PSAC0000
NPN O.C. Proximity Sensor, 25 ft. Cable PSAC0025
NPN O.C. Proximity Sensor, 50 ft. Cable PSAC0050
Block Mount for 3/4" Cylindrical Sensors 5400100
Steel Plug Mount 5403701
Stainless Steel Plug Mount 5403702

Do not dispose of unit in trash - Recycle

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.

SENSING TARGET

BROWN

BLACK

OSCILLATOR

.059
(1.5)

CIRCUIT

MAXIMUM SENSING DISTANCE
(SEE INFORMATION AT RIGHT
ON SENSING DISTANCE)

BLUE

Figure 1

MAXIMUM SENSING DISTANCE REDUCTION FACTORS

Reduction in the max. sensing distance
due to decrease in diameter of ferrous
targets.

100

50

% OF MAX. SENSING DISTANCE

0

0.25 .5 .7

TARGET DIAMETER

RATIO,

SENSOR DIAMETER

Figure 2

Typical reduction factors for various
nonferrous targets with diameters equal to
or greater than sensor diameter.

MATERIAL

MILD STEEL

STAINLESS

STEEL

ALUMINUM

BRASS

COPPER

10-30VDC @ 20mA

OUTPUT:
150mA MAX @ V = 1V
+30V MAX @ 0mA

COMMON

% SENSING DISTANCE

APPROX. 40%

APPROX. 35%

APPROX. 30%

Figure 3

OL

100%

APPROX. 75%

3/4" DIAMETER CYLINDRICAL SENSOR MOUNTING

BLOCK MOUNT

The PSAC and other Red Lion Controls 3/4" diameter cylindrical pickups
may be easily mounted using Model 5400100 BLOCK MOUNT (see diagram
below). This machined block of solid aluminum provides for rigid mounting
using the two 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.

1.625
(41.3)

.875

(22.2)

.625

(15.9)

#8-32 THD.
.25" (6.4) MIN.

.25

(6.4)

SENSOR

.50

(12.7)

.187

(4.8)

1.00

(25.4)

PLUG MOUNT

The PLUG MOUNT (see diagram below) allows 3/4" dia. cylindrical
sensors to be mounted in “thru-wall” applications. The Plug Mounts 3/4-14 NPT
thread is installed into a threaded wall or casing. The sensor is then installed
through the plug mount. The sensor-to-target airgap is adjusted and the sensor is
tightened into position by two #8-32 set screws. Tightening the ferrule nut
compresses a teflon ferrule around the sensor providing an oil tight seal. Plug
Mounts are available in both steel and stainless steel (see ordering information).

1 1/8" HEX
FERRULE NUT

#8-32 SET
SCREWS

2.01

1 1/16" HEX

3/4" x 14 NPT
PIPE THREAD

PICKUP
SENSING
FACE

Red Lion Controls
Headquarters
20 Willow Springs Circle
York PA 17406
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The Company warrants the products it manufactures against defects in materials and workmanship

LIMITED WARRANTY

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

Europe

Softwareweg 9

NL - 3821 BN Amersfoort

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Red Lion Controls

India
201-B, 2nd Floor, Park Centra
Opp 32 Mile Stone, Sector-30

Gurgaon-122002 Haryana, India

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Red Lion Controls

China

Unit 302, XinAn Plaza

Building 13, No.99 Tianzhou Road

ShangHai, P.R. China 200223

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