Micronor: Motorized ‘pots’ with 4-20 mA input control


Discrete Control

Micronor’s MR267 CLC option operates from commonly available 24 V dc and has an operating temperature range of -10 to 65 °C.

New MR267 Current Loop Controller (CLC) option from Micronor remotely controls a motorized potentiometer and/or rotary cam switch via 4-20 mA current loop, 0-2.5 V input, or external potentiometer. MR267 reportedly offers a simple, inexpensive way to automate existing systems controlled by manually operated potentiometers, rheostats, or rotary cam switches.
Motorized potentiometers (and rotary cam switches) are simple to set up, use, and maintain, and they work without the need for computers or software, says the company. User-specified potentiometers provide absolute position feedback or serve as a variable resistor in an analog control or bridge circuit. Motorized “pots” add a smooth uniform ramp throughout the timing cycle. Typical applications include dc motor field current ramping and start-up control of a generator.
These products are available in a wide variety of configurations. When the CLC option is specified, the MR267 control board, a MR267-dedicated rotational feedback pot, and 12-V dc motor are added to the configuration.
Associated firmware incorporates three trimpots, used to alter the motor pot’s normal operating mode and scale. For applications where analog control circuits operate only within a narrower region of a pot’s full scale range, POS A and POS B trimpots are used to program positional offsets corresponding to the lowest (4 mA) and highest (20 mA) input values. A third trimpot, SPEED, allows fine adjustment of the timing cycle.
Pricing for typical MPP Series single-turn motor pot configuration with two cam switches and MR267 option is $612, each, in small quantities (available 2-3 weeks ARO).

Frank J. Bartos, executive editor, Contol Engineering

No comments
The Engineers' Choice Awards highlight some of the best new control, instrumentation and automation products as chosen by...
The System Integrator Giants program lists the top 100 system integrators among companies listed in CFE Media's Global System Integrator Database.
The Engineering Leaders Under 40 program identifies and gives recognition to young engineers who...
This eGuide illustrates solutions, applications and benefits of machine vision systems.
Learn how to increase device reliability in harsh environments and decrease unplanned system downtime.
This eGuide contains a series of articles and videos that considers theoretical and practical; immediate needs and a look into the future.
Robot advances in connectivity, collaboration, and programming; Advanced process control; Industrial wireless developments; Multiplatform system integration
Sensor-to-cloud interoperability; PID and digital control efficiency; Alarm management system design; Automotive industry advances
Make Big Data and Industrial Internet of Things work for you, 2017 Engineers' Choice Finalists, Avoid control design pitfalls, Managing IIoT processes
This article collection contains several articles on the Industrial Internet of Things (IIoT) and how it is transforming manufacturing.

Find and connect with the most suitable service provider for your unique application. Start searching the Global System Integrator Database Now!

Big Data and bigger solutions; Tablet technologies; SCADA developments
SCADA at the junction, Managing risk through maintenance, Moving at the speed of data
Flexible offshore fire protection; Big Data's impact on operations; Bridging the skills gap; Identifying security risks
click me