# ANALOGUE UNIT

```ANALOGUE UNIT
For
PSM-R /M2
DISPLACEMENT SENSORS
© Noptel Oy 25.11.2010
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Noptel Oy,
Teknologiantie 2, FI-90590 Oulu, Finland
Tel. +358 40 181 4351,
Fax +358 8 556 4101,
Technical support:
see our Web site:
E-mail info@noptel.fi
www.noptel.fi
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Analogue output unit for PSM-R user’s manual
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Analogue output unit
The analogue output unit is a stand-alone micro controller based unit, which communicates
with the measurement unit via serial interface and at 19200 baud communication speed. The
unit is supplied by an external 12 VDC power supply.
The unit produces a voltage output (0-5 V), scaled to 10 mrad angle in full scale. The final
position of the target can be calculated by multiplying the angle value by the distance between
the measurement unit and the target. 0-10V output is also possible on request.
The output scale of the unit is:
PSM-R/M2
1 mrad = 0.5V (0-5V); 5V = 10 mrad
1 mrad = 180/π/1000 ≈ 0.05729577951°
1 mrad = 10 mm / 10 m
Displacement from zero line (mm) = distance (m) * ((AO signal (V)) – 2.5 V) * 2
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Example 1:
At 120 m distance the analogue output value is 3.5 V.
The displacement = 120 * (3.5 – 2.5) * 2 = 240 mm
Example 2:
At 10 m distance the analogue output value is 1.0 V.
The displacement = 10 * (1.0 – 2.5) * 2 = - 30 mm
The measurement unit automatically controls the transmitter optical power to produce the best
signal for the receiver. If the signal is too weak or too strong, it turns the correspondent error
light signal on.
When using an external PC together with the analogue unit, the primary control for the PSMR is
the analogue unit. The PC can be connected to the analogue unit to read the measurement
data for graphics display and data recording.
Analogue outputs, X/Y, 0-5V
RS 232
USB/RS Box
RS 232
PC / USB/RS port
PSM-R
Controller
12 VDC
I/O connections:
RS 232 for the PSM-R unit
USB or RS-232 for the PC
AO1 0-5 V, X-axis
AO2 0-5 V, Y-axis
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Analogue output unit for PSM-R user’s manual
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Led1, Error, the measurement unit does not respond
- Cable not connected
- PC/analogue unit switch in wrong position
- Low battery voltage
- Error in serial transmission
Led2, No Object, signal too low or too high
- No object in receiver sight
- Not enough reflecting power (too long measuring distance)
- Unclean or dirty reflector
- Too strong signal (prism located too near)
Blinking led: automatic power control running
Measurement speed
1 meas. speed 20 meas./s, 8 pulses filter (70)
2 meas. speed 50 meas./s, 6 pulses filter (54)
3 meas. speed 65 meas./s, 4 pulses filter (35)
4 meas. speed 100 meas./s, 2 pulses filter (16)
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Limited Warranty
The product has been thoroughly tested and inspected before shipment. All parts (excluding
accumulators) are warranted to be free of defects in material and workmanship for one (1) year
from the date of the shipment.
The Warranty is always subject to the concurrence of the following three conditions:
¾ (1) No claims under this Warranty will be honoured unless notice of a defect affecting
any specific item of Products is given to Noptel within the warranty period; and
¾ (2) Any specific item of Products considered by the Buyer to be covered by this
Warranty shall be returned, at the Buyer’s cost, to Noptel Oy together with a copy of
sale document showing the date of purchase within one (1) month from the day of
notice as set out above; and
¾ (3) Noptel Oy shall find such an item of Product returned to Noptel Oy as set forth
above defective due to faulty workmanship or use of defective materials.
If Noptel Oy finds the Product to be defective, Noptel Oy’s liability under this Warranty is limited
to repair or replacement of the Product free of charge, Ex Works (EXW), Oulu, Finland, or
credit for an amount equal to the invoiced value of the defective Product.
¾ When sensing a Product for the repair, please attach an explanation of the defect to
the shipment in order to expedite and facilitate service.
¾ This Warranty excludes all consequential damages.
¾ The Warranty will terminate, if an unauthorised person opens the units during the
warranty period.
¾ This Warranty does not cover defects caused by misuse or improper handling,
installation or maintenance of the products.
¾ Always follow the rules and hints for the proper handling and maintenance given by the
manufacturer. The units contain no user serviceable parts. Manufacturer or dealer is
not liable for damages caused by erroneous measurements or inadequate treatment.
Disposal: Do not dispose this product as unsorted municipal waste.
In the European Union all electrical and electronic products, batteries, and
accumulators must be taken to separate collection at the end of their working
life.
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Analogue output unit for PSM-R user’s manual
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Analogue output unit / Short form guide
RS-232 cable for
the USB/RS Box
and PC
Power supply
Red = +12 V
Black = Gnd
Power
ON/OFF
Control switch
- PC = sensor control
from the PC
- Analogue unit =
sensor control from
the analogue unit
RS-232 connector for the
Optical unit cable 19200 Bd
Led1 for error in operation with
the sensor
- Cable not connected or
- PC/analogue switch in wrong
position or
- Low battery voltage
- Serial communication error
Led2 for target identification
and signal power control
- No object in receiver sight
- Too much or too little reflection signal
- Error in operation
blinking -> power control in operation
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Speed control switch
- 1 50 ms / filter 8 pulses (70)
- 2 20 ms / filter 6 pulses (54)
- 3 15 ms / filter 4 pulses (35)
- 4 10 ms / filter 2 pulses (16)
AO2
0-5 V
X-axis
AO2
0-5 V
Y-axis
1 mrad = 0.5V (0-5V)
Displacement from zero line (mm) = distance (m) * ((AO signal (V)) – 2.5 V) * 2
Calibration testing:
- disconnect the optical unit
- turn power on
- speed 4 Æ maximum signal in analogue outputs
- speed 3 Æ middle signal in analogue outputs
- speed 2 Æ minimum signal in analogue outputs
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