Rockwell Automation 873P Ultrasonic Single Analog Output Sensors Installation Instructions - Manual (Page 3)

Rockwell Automation 873P-IN005A-EN-P—October 2014
873P Ultrasonic Single Analog Output Sensors 3
 Green LED indicates that an echo is reflected back to the
sensor by an object, not necessarily the target. Its primary use
if for alignment.
 If rising ramp
 If falling ramp
Other Functions
Hold Function
The Hold function inhibits sensor operation and holds the output
to its present state.
Analog Output: If the HOLD pin is connected to the NEG, the
ultrasonic wave emission is stopped and the analog output is
frozen in the present state. If the SYNC pin is connected to the
POS or not connected, the sensor operates normally.
Lockout Feature for Teach Button
The lockout feature locks the push button to prevent unwanted
teaching of the sensor.
Lock Teach Button: Press the teach button for eight seconds,
until the yellow LEDs A and B flash alternately with the green LED
C. Release the teach button. The push button is now locked.
Unlock Teach Button: Press the teach button for eight seconds,
until the yellow LEDs A and B flash alternately with the green LED
C. Release the teach button. It is once again possible to teach the
sensor.
Synchronization of Ultrasonic Sensors
In this mode, all sensors are connected to a same output on the
PLC. A SYNC pulse simultaneously drives all sensors connected to
the output on the PLC. When mounting the sensors, attention
must be paid to a minimum distance between the sensors; said
distance varies depending on the type(s) of sensors used (see
below). The target must be positioned at the same distance from
each synchronized sensor; the target position should overall be
flat. When mounted correctly, the synchronized sensors perform
like a single sensor with an extended detection angle.
How it Works:
Connect Pin 2 (white) to all the sensors you want to synchronize.
All sensors will trigger at the same time. Any eventual crosstalk
signal related to a longer sensing distance will be ignored. An
external synchronization pulse controls the sensors.
All minimum distances depend on target distance and material.
“T” is the pulse time period applied on the SYNC wire; “Width”
refers to the pulse width.
• 400 mm Sensing Range Sensors
T ≥ 4 msec
500 μsec ≤ Width ≤ 1 msec
Minimum distance between sensors: 50
… 100 mm.
• 900 mm Sensing Range Sensors
T ≥ 7.5 msec
500 μsec ≤ Width ≤ 1 msec
Minimum distance between sensors: 30
… 50 mm.
Single Analog Output
Operating Mode
Green LED
(Alignment)
Yellow LED A
(Output) Yellow LED B (Teach)
Standard Operation
Target present ON  ONor OFF OFF
Target absent ON/OFF ON or OFF OFF
• 2200 mm Sensing Range Sensors
T ≥ 17.5 msec
500 μsec ≤ Width ≤ 1 msec
Minimum distance between sensors: 30
… 40 mm.
• 2500 mm Sensing Range Sensors
T ≥ 25 msec
500 μsec ≤ Width ≤ 5 msec
Minimum distance between sensors: 100 mm for working
distances up to 1.5 m, and 50 mm for distances greater than
1.5 m. Target material also affects these distances.
• 3500 mm Sensing Range Sensors
T ≥ 35 msec
500 μsec ≤ Width ≤ 5 msec
Minimum distance between sensors: 100 mm for working
distances up to 1.5 m, and 50 mm for distances greater than
1.5 m. Target material also affects these distances.
• 6000 mm Sensing Range Sensors
T >=60 ms
500 usec<=Width<= 1 msec
Minimum distance between sensors is 200 mm. Target material
also affects these distances.
Beam Diagrams
50…400 mm Sensing Range
Distance [mm (in.)]
0 100
(3.93)
200
(7.87)
300
(11.8)
400
(15.7)
500
(19.6)
Pa
rallel displac
emen
t [mm]
Target 25 mm dia.
Target 100*100 mm
Target 100*100 mm
Target 100*100 mm
Target 25 mm dia.
-100
-50
0
50
100
150
-150
Distance [mm (in.)]
0 200
(7.87)
400
(15.7)
600
(23.6)
800
(31.4)
1000
(39.3)
Pa
rallel displac
emen
t [mm]
-100
-50
0
50
100
150
-150
200
-200
Target 25 mm dia.
Target 200*200 mm
Target 200*200 mm
Target 200*200 mm
Target 25 mm dia.
Distance [mm (in.)]
0 500
(19.68)
1000
(39.3)
1500
(59.0)
2000
(78.7)
2500
(98.4)
Pa
ra
llel displac
emen
t [mm]
-100
-50
0
50
100
150
-150
200
-200
Target 25 mm dia.
Target 200*200 mm
Target 200*200 mm
Target 200*200 mm
Target 25 mm dia.
250
-250
300
-300
Pa
ra
llel displac
emen
t [mm]
-100
-50
50
100
150
-150
200
-200
250
-250
300
-300
0
0 500
(19.6)
2000
(78.7)
3000
(118.1)
Distance [mm (in.)]
Target 25 mm dia.
Target 200*200 mm
Target 200*200 mm
Target 200*200 mm
Target 25 mm dia.
1000
(39.3)
2500
(98.4)
1500
(59.0)
200…2500 mm Sensing Range 200…2200 mm Sensing Range
100…900 mm Sensing Range
Pa
rallel displac
emen
t [mm]
-100
-50
50
100
150
-150
200
-200
250
-250
300
-300
350
-350
400
-400
0
0 1000
(39.3)
2000
(78.7)
3000
(118.1)
4000
(157.4)
Distance [mm (in.)]
Target 25 mm dia.
Target 200*200 mm
Target 200*200 mm
Target 200*200 mm
Target 25 mm dia.
200…3500 mm 6000 mm
P a rallel displac
ement [mm]
7000
(275.6)
6000
(236.2)
5000
(196.8)
4000
(157.5)
3000
(118.1)
2000
(78.7)
1000
(39.4)
0
-600.0
-500.0
-400.0
-300.0
-200.0
-100.0
0.0
100.0
200.0
300.0
600.0
400.0
500.0
Distance [mm (in.)]
Target 200*200 mm
Target 200*200 mm
Target 400*400 mm
Target 400*400 mm