Rockwell Automation 873P Ultrasonic Sensors with Dual Discrete/Single Analog Outputs Installation User Manual
Important: save these instructions for future use
 
Rockwell Automation 873P-IN004A-EN-P—October 2014
Operating Voltage
Double Discrete Outputs
These sensors feature two programmable independent set points 
with sourcing (PNP) outputs that can be configured for normally 
open (N.O.) or normally closed (N.C.) operation. 
Window Function
In this sensing mode, you teach the sensor a near set point and a 
far set point within the defined sensing range of the sensor. P1 
and P2 define the analog output slope. P1 determines the 4 mA 
position and P2 determines the 20 mA position. 
With normally open logic, if an object passes through the defined 
window, the discrete output turns ON or the opposite if the logic 
is normally closed. The analog output is scaled between the two 
taught set points.
Set Point 1 (P1):
1. Place the target at the desired near/far set point.
a. The near set point first yields a normally open/rising ramp.
b. The far set point first yields a normally closed/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 near/far set point.
2. Press the teach button and release while the green and yellow 
LEDs blink five times. The sensor is ready to operate.
Operating Voltage
Models
12…30V DC
Analog current models
15…30V DC
Analog voltage models
The 873P sensor is a one set point mode with a 
maximum sensing range from the factory.
IMPORTANT
20 mA
N.O.
Pin 4
(BK)
Blind Z
one
4 mA
mm
P2
P1
BZ
H
Pin 2
(WH)
L
H
L
20 mA
N.C.
Pin 4
(BK)
Blind Z
one
4 mA
mm
P1
P2
BZ
H
Pin 2
(WH)
L
H
L
Installation Instructions
873P Ultrasonic Sensors with Dual Discrete/Single Analog Outputs
IMPORTANT: SAVE THESE INSTRUCTIONS FOR FUTURE USE.
Specifications
AIP2–(2) PNP discrete output and (1) analog current 
(4…20 mA) or AVP2–(2) PNP discrete outputs and (1) analog 
voltage (0…10V DC)
Metallic target 200 x 200 mm (7.87 x 7.87 in.)
Metallic target 400 x 400 mm (15.75 x 15.75 in.)
Model
873P-D30-2500-D5 873P-D30-3500-D5 873P-D30-6000-D5
Certifications
cULus Listed and CE Marked for all applicables directives
Rated Sensing Distance
200…2500 mm 
(7.87…98.4 in.)
250…3500 mm
(9.84…137.8 in.)
350…6000 mm 
(13.78…236.2 in.)
Teachable Sensing Range 200…2500 mm 
250…3500 mm
350…6000 mm 
Blind Zone
0…200 mm
(0…7.87 in.)
0…250 mm
(0…9.84 in.)
0…350 mm
(0…13.78 in.)
Beam Angle
14° ±1°
15° ±2°
Sensitivity Adjustment
Push button
Repeatability
0.2% of full-scale value
Linearity
1% of full scale value
Resolution
2 mm (0.08 in.)
4 mm (0.16 in.)
6 mm (0.24 in.)
Accuracy
<0.1% of sensing range
Hysteresis
<1%
Ripple
5%
Current Consumption
≤50 mA
Protection Type
Short-circuit, reverse polarity, transient noise, overload
Output Current
100 mA (digital output)
Leakage Current
≤10 μA @ 30V (digital output)
Transducer Frequency
150 kHz
112 kHz
75 kHz
Output Voltage Drop
2.2V max (digital output)
Output Type 
AIP2 or AVP2
Switching Frequency
2 Hz (digital output)
1 Hz (digital output)
Response Time
250 ms (digital output)
500 ms (digital output)
Time Delay before 
Availability
≤900 ms (digital output)
Response Time (analog 
output)
600 ms (analog output)
Time Delay before 
Availability
≤1400 ms (analog output)
Temperature Range
-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)