Milltronics MD-256 Instruction Manual

MD-256 Speed Sensor

33455430
Rev 1.0

Instruction Manual
PL-543
April 1998

hank you for purchasing Milltronics products. We endeavour to design

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equipment that is simple to use and reliable in its operation, with the aim

of satisfying our customers' needs.

Milltronics has been designing and manufacturing process equipment since

1954. Our fields of expertise include ultrasonic and capacitance level

measurement, in-line weighing of dry bulk solids and motion sensing.

Milltronics is established world wide through associate offices and

representatives. Our network is continually being refined to provide our

customers with first rate sales information, engineering assistance and after

sales support.

For more details on our products and service, please contact us and we will

provide you with a listing of the offices or representatives nearest you.

TABLE OF CONTENTS

Specifications 4

General Operation 5

Circuit 5

Installation 6

Dimensions 6
Mounting 7

Mounting to a Tail Pulley 8
Mounting to a Bend or Snub Pulley 9
General Installation Steps 10
Interconnection (Wiring) 11

Terminals 11

Terminal Connections to Integrators 12

Maintenance 13

Inspection 13

Bearing Replacement 13

3 PL-543

SPECIFICATIONS

Power

Ambient
Temperature

Input

Output

Enclosure

Approval

Cable (optional)

Weight

»

+10 to +15V dc, 30mA (from integrator)

»

-40° to 55° C (-40°F to 131°F)

»

Shaft rotation 0.5 to 470 rpm, bidirectional

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Unidirectional open collector sinking output

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+5V dc, 25mA max (to integrator)

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256 pulses per revolution

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2 to 2000Hz

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General purpose

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Aluminum

»

CE

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3-wire shielded, 7.5mm2 (18 AWG)

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Max run 305m (1000’)

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1.22 kg (2.68 lb.)

PL-543 4

GENERAL OPERATION

The MD-256 is a digitizing speed sensor for use on belt scales. It connects to the shaft of a
pulley and measures the shaft's rotation by sending pulses to the Milltronics integrator.

This speed sensor features:

»

High resolution for accurate measurement

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Small size

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Light weight

»

Long bearing life

CIRCUIT

256 pulses are generated for each rotation of the MD-256 shaft. These pulses are typically
fed into a Milltronics belt scale integrator. The integrator interprets the pulses and uses
them in the calculation of belt speed, flow rate, and material totalization.

Integrators with which the MD-256 works are:

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Compuscale

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Compuscale II

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Compuscale IIA

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CompuScale-III

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Compu-M

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Accumass BW-100

»

Competitive integrators – consult your local Milltronics representative

5 PL-543