Rockwell Automation 873P User Manual

Installation Instructions

IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.

IMPORTANT

Ultrasonic Single Analog Output Sensors

Specifications

Model 873P-D18-400-D4 873P-D18-900-D4 873P-D18-2200-D4 873P-D30-2500-D4 873P-D30-3500-D4 873P-D30-6000-D4

Certifications cULus Listed and CE Marked for all applicable directives

Rated Sensing Distance

Teachable Sensing Range

Blind Zone

Beam Angle ±8° ±7° 14° ±1° 15° ±2°
Sensitivity Adjustment Push button
Linearity <1% of full scale value
Resolution 1 mm (0.04 in.) 2 mm (0.08 in.) 3 mm (0.12 in.) 2 mm (0.08 in.) 4 mm (0.16 in.) 6 mm (0.24 in.)
Accuracy 0.1% of sensing range
Hysteresis <1% of full scale value
Ripple 5%
Current Cons umption ≤50 mA

Output Type 

Transducer Frequency 300 kHz 200 kHz 150 kHz 112 kHz 75 kHz
Response Time 500 ms 600 ms
Time Delay before Availability ≤900 ms ≤1400 ms
Electrical Protection Polarity reversal, transient noise, short circuit, overload
Minimum Load (analog voltage) 3 kΩ
Maximum Current (analog voltage output) 40 mA
Temperature Range -20…+60° C (-4…+140° F) -20…+70° C (-4…+158° F)
Temperature Compensation Yes
Temperature Drift ±5%
Housing Material Plastic—PBT

Active Head Material Epoxy—glass resin

Ingress Protection Rating IP67 (EN 60529)

 AV–Analog voltage (0…10V DC) or AI–Analog current (4…20 mA)
 Metallic target 100 x 100 mm (3.94 x 3.94 in.)

 Metallic target 200 x 200 mm (7.87 x 7.87 in.)
 Metalic target 400 x 400 mm (15.75 x 15.75 in.)

50…400 mm 
(1.97…15.7 in.)

100…400 mm 
(3.94…15.7 in.)

0…50 mm
(0…1.97 in.)

AV or AI

100…900 mm 
(3.94…35.4 in.)

100…900 mm  200…2200 mm  200…2500 mm  250…3500 mm  350...6000 mm 

0…100 mm
(0…3.94 in.)

200…2200 mm 
(7.87…88.6 in.)

0…200 mm 0…200 mm 0…250 mm 0...350mm

200…2500 mm 
(7.87…98.4 in.)

250…3500 mm 
(9.87…137.8 in.)

350…6000 mm 
(13.8…236.2 in.)

Operating Volt age Catalog Numbers

12…30V DC 873P-D30AI-2500-D4, 873P-D30AI-3500-D4, 873P-D30AI-6000-D4

873P-D18AV-400-D4, 873P-D18AI-400-D4,

15…30V DC

873P-D18AV-900-D4, 873P-D18AI-900-D4,
873P-D18AV-2200-D4, 873P-D18AI-2200-D4, 873P-D30AV-2500­D4, 873P-D30AV-3500-D4, 873P-D30AV-6000-D4

The 873P sensor is a one set point mode with a
maximum sensing range from the factory.

Rockwell Automation 873P-IN005A-EN-P—October 2014

2 873P Ultrasonic Single Analog Output Sensors

20 mA/
10V DC

Rising
Ramp

Pin 4

(BK)

Blind Zone

4 mA/
0V DC

mmP2P1BZ

20 mA/
10V DC

Falling
Ramp

Pin 4

(BK)

Blind Zone

4 mA/
0V DC

mmP1P2BZ

20 mA/
10V DC

Rising
Ramp

Pin 4

(BK)

Blind Zone

4 mA
0V DC

mmP1=P2Minimum
Sensing
Distance

BZ

Window Mode

In this sensing mode, you teach the sensor a near set point and far
set point within the defined sensing range of the sensor. P1 and
P2 define the analog output slope. P1 determines the 4 mA/0V DC
position and P2 determines the 20 mA/10V DC position. The
analog output is scaled between the two taught set points.

Rising ramp: current or voltage values increase as the target
distance increases from the sensor.

1. Place the target at the desired set point.

2. Press and release the teach button. The yellow and green LEDs
flash simultaneously, indicating that the sensor has learned the
set point.

3. Keeping the target in the same position, press and release the
teach button. The yellow LED blinks twice to indicate that the
sensor is ready for use. The minimum sensing distance is
indicated in the Specifications table.

Falling ramp: current or voltage values decrease as the target
distance increases from the sensor.

Set Point 1 (P1)

1. Place target at the desired near/far set point.
a. The near set point first yields a rising ramp.

b. The far set point first yields a falling ramp.

2. With the target still in place, press the teach button, then
release.

The yellow and green LEDs flash simultaneously, indicating that
the first set point P1 is now set. The sensor is waiting for the last
set point.

Set Point 2 (P2)

1. Place the target at the desired far/near set point.

2. Press the teach button and release. The sensor is ready to
operate.

One Set Point Mode

In this sensing mode, a set point is taught in the defined sensing
range. The working range of the sensor becomes the minimum
sensing distance to a user-taught set point. Depending on where
the set point is taught, the output will turn ON when the target
passes between the minimum sensing distance of the sensor and
the taught set point. The analog output is scaled between those
two set points. When using the One Set Point mode, it is only

possible to configure the sensor for rising ramp analog
output. It is not possible to configure the sensor for a falling
ramp.

IMPORTANT

When configuring the sensor for One Set Point
mode, it is very important that the target is at the
exact same distance for both the first and second
push of the teach button. If the target (or sensor)
has moved even slightly, the detected ranges will
be different for the two pushes of the teach
button, and the sensor will be configured for
Window Mode.

IMPORTANT

The green and yellow LEDs flash asynchronously
for about two seconds indicating there is no
target present within the sensing range of the
sensor and therefore no set point to teach. When
this happens, the 873P ignores this teach
attempt and restores its previous settings. By
comparison, when an object is detected during
the teach, the yellow and green LEDs flash
synchronously and continue flashing until the
second push of the teach button.

Single Analog Output Indicator LED Functions

LED Color Function

AYellow Output state
B Yellow Teach function
C Green ECHO LED/ Teach function

M18 LEDs

(Yellow)
Output state

Teach button

4

(Yellow)
Teach

123

(Green)
Echo/teach

Yellow LED A
output state

Rockwell Automation 873P-IN005A-EN-P—October 2014

M30 LEDs

Teach button

Yellow LED B
Teach function

AB

C

Green LED C

Echo LED/teach function