RPS - 401A-80P Self Contained Sensor for Level Control and Industry0 pages

Features

RPS-401A-80P

• Adjustable Zero & Span

• Analog Current & Voltage Outputs

• Sensing Range 8-80 in.

• Reverse Polarity Protected

• Narrow Sensing Beam

• Self Contained Barrel Housing

• LED Strength Indicator

• Input Voltage 20-30 VDC

• Short Circuit Protected

• RPS-401A-in PVC Housing

• Wide Temperature Range

• Wide Chemical Resistance Range (PVC)

• Selectable Inverted & Non-Inverted Outputs

The RPS-401A-80P analog ultrasonic sensor is
mounted in a PVC barrel housing and is completely
self contained. It is powered by 20-30 VDC and is
reverse polarity protected. It also has a narrow beam
angle which enables it to get into tight places. A flat
target can tilt up to 10 degrees and still be detected.
The RPS-401A-80P has 2 short circuit protected
analog outputs, 4-20mA and 0-10 VDC. These
outputs can easily be inverted and can be scaled over
almost any range by means of adjusting the zero (P1)
and span control (P2). The (P1) potentiometer must
be adjusted first. Both analog outputs can be used at
the same time.
For set-up purposes an LED strength indicator is

10"

Adjustable Span

0v
4 ma

19" 80" Range
10v
20 ma

8"
0v
4 ma

provided. This LED is Green when not detecting and
changes to a bright Red as a target moves into place
depending on how much reflected signal is coming
back from the target. The frequency of operation for
the RPS-401A-80P is 140kHz.
The RPS-401A-80P is constructed of PVC. The
barrel measures 30mm x 105mm. A standard 6' cable
is provided.

Adjustable Span

8"

80" 80" Range
10v
20 ma

Adjustable Span

80" 80" Range

10v
20 ma

0v
4 ma

Minimum Analog Span

Maximum Analog Span

Inverted Analog Outputs

Analog sensing in the Minimum sensing
configuration means detecting an object over a
9" range with the RPS-401A-80P. This 9" span
can be adjusted to occur over any part of the
sensors range. For example it could be adjusted
to occur from 8" to 17" or 25" to 34". This is done
by means of the two potentiometers on the sensor. This sensor has a 8:1 adjustment ratio on its
analog output, meaning that the RPS-401A-80P
has a maximum span of 72" (range 8" to 80").
The analog output can also be adjusted anywhere between the 8" and 80" range. These
adjustments are made by the two potentiometers
on the sensor. With no more than two adjustments of each potentiometer the desired span
will be achieved.

Analog sensing in the Maximum ranging
configuration means detecting an object over an 8"
to 80" range with the RPS-401A-80P. This 72"
span goes from the sensors minimum sensing
distance of 8" to its maximum sensing distance
of 80". The adjustment procedure is the same
as described in the minimum analog ranging
section. The RPS-401A-80P in the maximum
ranging configuration detects an object over a
72" range. This span goes from the sensors minimum sensing distance of 8" to its maximum
sensing distance of 80". This sensor also has a
8:1 adjustment ratio on its analog output so its
minimum analog ranging capability is a span of
9". These adjustments are made by the two
potentiometers on the sensor.

The RPS-401A-80P has the ability to invert
its analog outputs, meaning that the current or
voltage will decrease as distance from the sensor
increases. 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
then will invert the current output to 20mA - 4mA.
To make the voltage output inverted 10v - Ov the
current output needs to be tied to the positive of
the supply voltage. In the standard mode
of operation (non-inverted) P1 adjusts the near
point 4mA (Ov) and P2 adjusts the far point
20mA (10v). In the inverted mode of operation
P1 adjusts the near point 20mA (10v) and P2
adjusts the far point 4mA (Ov). Always adjust the
(P1) potentiometer first.

Migatron Corporation

D.1