Digital Output Manual

TECHNICAL DATA
US18 SERIES
- Digital outputultrasonic sensors
INSTRUCTION MANUAL
Power supply:
Ripple:
Consumption
(load current excluded):
Outputs:
Output current:
Output saturation voltage:
Response time:
Max. switching frequency:
Range indicator:
(Red/Green)
Teach/Output indicator:
(Yellow/Red)
Setting:
CONTROLS
Programming push-button (TEACH)
This push-button allows to program the reading points of the sensor.
PWR LED indicator
OFF
ON Red
ON Green
Indicates
Power is OFF.
Target is weak or outside sensing range.
Sensor is operatine normally, good target.
OUT LED indicator
OFF
ON Yellow
ON Red (solid)
ON Red (flashing)
Indicates
Target is outside windows limits (normally open operation)
Target is within windows limits (normally open operation)
In TEACH mode, waiting for first limit
In TEACH mode, waiting for second limit
CONNECTIONS
BROWN
1
WHITE
2
BLACK
4
+
10 … 30 Vdc
NPN OUTPUT
Delay at Power-Up:
Temperature effect:
Temperature warmup drift:
Repeatability:
Minimum window size:
Hysteresis:
Ultrasonic emission:
Remote teach input:
Operating temperature:
Storage temperature:
Maximum relative humidity:
Electrical shock protection:
Operating distance (typical values):
Vibrations:
Reference standard:
Shock resistance:
Housing material:
Threaded barrel material:
Push-button material:
Light pipes material:
Mechanical protection:
Connections:
Weight:
5
BLUE
REMOTE TEACH (0…2 Vdc)
NPN and PNP (N.O. or N.C. selectable)
100 mA max. overload and short circuit protection
PNP  1.2 V @ 10 mA,  1.6 V @ 100 mA
NPN  200 mV @ 10 mA,  600 mV @ 100 mA
5ms
100 Hz
Green
Target is within sensing range
Red
Target is outside sensing range
OFF
Sensing power is OFF
Yellow
Target is within sensing range
OFF
Target is outside taught window limits
Red
Sensor is in Teach mode
Sensing window limits: TEACH-Mode programming of
near and far window limits may be set using the push
button or remotely via TEACH input
300 ms
0.02% of distance/°C
Less than 1.7% of sensing distance upon power-up
0.5 mm
5 mm
0.7 mm
300 KHz, rep. rate 2.5 ms
Impedence: 12 K
-20 … 60 °C
-25 … 70 °C
100%
Class 2
30…300 mm
0.5 mm amplitude, 10…55 Hz frequency, for every axis
(EN60068-2-6)
EN60947-5-2
11 ms (30 G) 6 shock for every axis (EN60068-2-27)
Thermoplastic polyester
ABS/PC
Santoprene
Acrylic
IP67
M12 - 5 pole connector
25 g
Programming
mode
Remote programming may be used to disable the push button, preventing unauthorized personnel from
adjusting the programming settings. To access this feature, connect the Remote Teach wire of the
sensor to 0 - 2V dc, with a remote programming switch between the sensor and the voltage.
NOTE: The impedance of the Remote Teach input is 12 K.
Programming is accomplished by following the sequence of input pulses (see chap. “Normally
Open/Normally Closed operation select”). The duration of each pulse (corresponding to a push button
“click”), and the period between multiple pulses, are defined as “T”:
Re-TEACH
Limit
0.04 seconds < T < 0.8 seconds
Indicators LED
Remote line
(remote teach)
No action required;
sensor is ready for 1st
limit teach
OUT LED: ON, RED
PWR LED:
ON GREEN (good signal)
ON RED (no signal)
Position the target for
the center of window
PWR LED:
must be ON GREEN
TEACH
Limit
“Click” the TEACH
push-button
Single-pulse
the remote line
(0.04 s < T < 0.8 s)
Without moving the
target, “click” the
TEACH push-button
again
Without moving the
target, single-pulse the
remote line again
(0.04 s < T < 0.8 s)
Teach accepted:
OUT LED, flashing, RED
Teach unacceptable:
OUT LED, ON RED
Teach accepted:
OUT LED, YELLOW or
OFF
Teach unacceptable:
OUT LED, flashing, RED
TEACH interface
General Notes on Programming
The sensor will return to RUN mode if the first TEACH condition is not registered within 120 seconds.
After the first limit is taught, the sensor will remain in PROGRAM mode until the TEACH sequence is
finished.
To exit PROGRAM mode without saving any changes, press and hold the programming push button >
2 seconds (before teaching the second limit). The sensor will revert to the last saved program.
AXIAL VERSION
PWR LED
Teaching Minimum and Maximum Limits
Programming procedure
TEACH push-button
1
Push and hold TEACH
push-button
Position the target for
the center of window
M12 - 5 POLE CONNECTOR
5
Programming procedure
TEACH push-button
0V
4
Teaching the same limit twice for the same output automatically centers a 10 mm window on the taught
position ( 5 mm).
65mA max., 40 mA typical @ 25 Vcc
DIMENSIONS
TEACH PUSH-BUTTON
3
Two TEACH methods may be used to program the sensor:
 Teach individual minimum and maximum limits.
 Use Auto-Window feature to center a sensing window around the taught position.
The sensor may be programmed either via its push button, or via a remote switch.
US18-PA
US18-PR
AXIAL VERSION
RADIAL VERSION
10 … 30 Vdc (limit values), reverse polarity protection
 2 Vpp
See chap. “Normally Open/Normally Closed Operation Select.”
PNP OUTPUT
GREY
Teaching limits using the Auto-Window feature
SENSOR PROGRAMMING
3
Remote line
(remote teach)
Indicators LED
Normally Open/Normally Closed Operation Select
OUT LED
90.9
2
Programming
mode
53.8
Push and hold TEACH
push-button
No action required;
sensor is ready for 1st
limit teach
OUT LED: ON, RED
PWR LED:
ON GREEN (good signal)
ON RED (no signal)
The sensor can be configured for either normally open or normally closed via the remote teach wire
(gray).
A series of three pulses on the line will toggle between normally open and normally closed operation.
Normally open is defined as the output energizing when the target is present.
Normally closed is defined as the output energizing when the target is absent.
Programming procedure
18
PRINCIPLES OF OPERATION
TEACH push-button
Position the target for
the first limit
Ultrasonic sensors emit one or multiple pulses of ultrasonic energy, which travel through the air at the
speed of sound. A portion of this energy reflects off the target and travels back to the sensor.
The sensor measures the total time required for the energy to reach the target and return to the sensor.
The distance to the object is then calculated using the following formula:
TEACH
First limit
D = Distance from the sensor to the target
C = Speed of sound in air
T = Transit time for the ultrasonic pulse
“Click” the TEACH
push-button
To improve accuracy, an ultrasonic sensor may average the results of several pulses before outputting
a new value.
Temperature Effects
TEACH PUSH-BUTTON
PWR LED
NOTE:
 Exposure to direct sunlight can affect the sensor’s ability to accurately compensate for changes in
temperature.
 If the sensor is measuring across a temperature gradient, the compensation will be less effective.
 The temperature warmup drift upon power-up is less than 1.7% of the sensing distance.
After 10 minutes, the apparent switchpoint will be within 0.3% of the actual position.
After 25 minutes, the sensing position will be stable.
Position the target for
the second limit
Position the target for
the second limit
“Click” the TEACH
push-button
Single-pulse
the remote line
(0.04 s < T < 0.8 s)
TEACH
Second limit
OUT LED
95.1
58
Teach unacceptable:
OUT LED, ON RED
PWR LED:
must be ON GREEN
Not available
via push-button
N.O./N.C. function
Either normally open or
normally closed
operation is selected,
depending on previous
condition.
TEACH push-button lockout
Enables or disables the push button to prevent unauthorized personnel from adjusting the program
settings.
Programming procedure
TEACH
Pushbutton
lockout
Not available
via push-button
Remote line
(remote teach) 0.04 s < T < 0.8 s
Four impulse the remote line
Enable/Disable
Function
Push-button are either
enabled or disabled,
depending on
condition..
Teach accepted:
OUT LED, YELLOW or OFF
Teach unacceptable:
OUT LED, flashing RED
18
NOTE: The duration of each pulse (corresponding to a push button “click”), and the period
between multiple pulses, are defined “T” (0.04 s < T < 0.8 s).
3.6
Changes in air temperature affect the speed of sound, which in turn affects the distance reading
measured by the sensor. An increase in air temperature shifts both sensing window limits closer to the
sensor. Conversely, a decrease in air temperature shifts both limits farther away from the sensor.
This shift is approximately 3.5% of the limit distance for a 20° C change in temperature.
The US18 series ultrasonic sensors are temperature compensated. This reduces the error due to
temperature by about 90%. The sensor will maintain its window limits to within 1.8% over the -20° to
+60° C range.
Teach accepted:
OUT LED, flashing RED
Toggle
between
N.O./N.C.
operation
TEACH push-button
Cm/s = Speed of sound in meters per second
Tc
= Temperature in °C
Temperature Compensation
Single-pulse
the remote line
(0.04 s < T < 0.8 s)
PWR LED:
must be ON GREEN
mm
RADIAL VERSION
The speed of sound is dependent upon the composition, pressure and temperature of the gas in which
it is traveling. For most ultrasonic applications, the composition and pressure of the gas are relatively
fixed, while the temperature may fluctuate.
In air, the speed of sound varies with temperature according to the following approximation:
Position the target for
the first limit
Remote line
(remote teach) 0.04 s < T < 0.8 s
Triple-pulse the remote line
DECLARATION OF CONFORMITY
We DATALOGIC AUTOMATION declare under our sole responsibility that these products are conform
to the 2004/108/CE and successive amendments.
WARRANTY
DATALOGIC AUTOMATION warrants its products to be free from defects.
DATALOGIC AUTOMATION will repair or replace, free of charge, any product found to be defective
during the warranty period of 36 months from the manufacturing date.
This warranty does not cover damage or liability deriving from the improper application of DATALOGIC
AUTOMATION products.
8.5
DATALOGIC AUTOMATION cares for the environment: 100% recycled paper.
DATALOGIC AUTOMATION reserves the right to make modifications and improvements without prior notification.
See chap. “Normally Open/Normally Closed Operation Select.”
Phone: 800.894.0412 - Fax: 888.723.4773 - Web: www.ctiautomation.net - Email: info@ctiautomation.net
Datalogic and the Datalogic logo are registered trademarks of Datalogic S.p.A. in many countries,
including the U.S.A. and the E.U.
826002193 Rev.C
© Copyright Datalogic 2007-2010