RPS-150A0 pages

Features

RPS-150A

Adjustable Zero & Span

Analog Current & Voltage Outputs

Broad Sensing Beam

Selectable Inverted & Non-Inverted Outputs

Range 2 to 40", or 5 to 80"

Short Circuit & Reverse Polarity Protected

LED Strength Indicator

Limit Switch Style Housing

The RPS-150A analog ultrasonic sensor is
mounted in a limit switch housing and is completely
self contained. It is powered by 20-30VDC and is
reverse polarity protected. It also has a wide beam
angle which enables it to detect a target that is not at
right angles. A flat target can tilt up to 35 degrees and
still be detected. The RPS-150A has 2 short circuit
protected analog outputs, 4-20mA and 0-10VDC.
These outputs can easily be inverted and can be scaled
over almost any range by means of adjusting the zero
& span control. For set-up purposes a LED strength
indicator is provided. This LED is green when not
detecting and fades to RED as a target moves into
10"
12"
0v
4mA

Adjustable

15" 40" Range
24" 80" Range
10v
20mA

Minimum Analog Ranging

2"
5"

0v
4mA

place, depending on how much reflected signal is
coming back from the target. The frequency of
operation is 38.5kHz. There are two ranges available
in this model 2" to 40" or 5" to 80". It also features a
quick disconnect receptacle. The housing is constructed of plastic valox and has standard 30mm X
60mm limit switch mounting dimensions as well as
side holes for mounting the sensor on its side.

Adjustable

40" 40" Range
80" 80" Range
10v
20mA

Maximum Analog Ranging

Minimum Analog Ranging

Maximum Analog Ranging

Analog sensing in the Minimum sensing configuration means detecting an object over a 5" range with
the RPS-150A-40. This 5" span can be adjusted to
occur over any part of the sensors range. For
example, it could be adjusted to occur from 10" to 15"
or 25" to 30". This is done by means of the two
potentiometers on the sensor. This sensor has a 5 :
1 adjustment ratio on its analog output, meaning that
the RPS-150A-40 has a maximum span of 38" (range
2" to 40"). The analog output can also be adjusted
anywhere between the 5" and 38" spans. These
adjustments are made by the two potentiometers on
the sensor. With no more then two adjustments of
each potentiometer, the desired range will be achieved.

Analog sensing in the Maximum ranging configuration means detecting an object over a 38" range
with the RPS-150A-40. This 38" span goes from the
sensors minimum sensing distance 2" to its maximum
sensing distance 40". The adjustment procedure is the
same as described in the minimum analog ranging
section. The RPS-150A-80 in the maximum ranging
configuration detects an object over a 75" range. This
span goes from the sensors minimum sensing distance
of 5" to its maximum sensing distance of 80". This
sensor also has a 5 : 1 adjustment ratio on its analog
output so its minimum analog ranging capability is
a span of 12". These adjustments are made by the two
potentiometers on the sensor.

Migatron Corporation - 2001

-15-

2"
5"

10v
20mA

Adjustable

40" 40" Range
80" 80" Range
0v
4mA

Inverted Analog Outputs

Inverted Analog Outputs
The RPS-150A has the ability to invert its analog
outputs, meaning that the current or voltage will
decrease with distance. For the current output to be
inverted the voltage output needs to be tied to the
positive of the supply voltage of the sensor. This will
then invert the current output to 20mA - 4mA. To
make the voltage output inverted 10v - 0v the current
output needs to be tied to the positive of the supply
voltage. In the standard mode of operation (noninverted) P1 adjusts the near point 4mA (0v) and P2
adjusts the far point 20mA (10v). In the nonstandard mode of operation (inverted) P1 adjusts the
near point 20mA (10v) and P2 adjusts the far point
4mA (0v).