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MM301A

MM301A

MM300 & MM500 Series

The MM301A dual-voltage single quandrant SCR drive controls 90 or 180 VDC SCR brush-type motors ranging from 1/4 Hp through 2Hp. The MM301A has integrated isolation allowing it to precisely follow analog current or voltage signals from external devices or a potentiometer as a reference for motor speed control. This results in significant labor and material cost reduction compared to other systems employing a seperate drive and isolation card.

This multi-featured chassis drive accepts optional input for start and stop. Depending on the application, users can run the drive open-loop with armature feedback or closed loop with tachogenerator feedback for enhanced performance. This drive accepts nearly any DC tachogenerator (7-50 V/KRPM), scaleable using an adjustable tachogenerator gain potentiometer.

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Model
Number
Enclosure Maximum
Current
(ADC)
Input
Voltage
(VAC)
Output
Voltage
(VDC)
Power Range Field / Shunt
Supply
Braking Reversing Isolation
HP kW
MM301A NEMA 4X 10 115 0 - 90 1/8 - 1 .09 - .75 50 / 100 No No 0 - 10 VDC
4 - 20 mA
230 0 - 90 1/8 - 1 .09 - .75 100 / 200
0 - 180 1/4 - 2 .19 - 1.5

Features

  • NEMA 4X Enclosure: Water resistant and dust proof enclosure
  • Field Supply: Voltage output to energize the field winding of a shunt-wound motor
  • 3-Wire Start/Stop: On-board latching relay allows for use of momentary Start/Stop pushbottons
  • Isolation Logic: Allows floating or grounded 0 - 10 VDC or 4 - 20mA signals. Burr-Brown provides .01% linearity
  • Diagnostic LEDs: Power, Current Limit
  • Case LEDs: Power
  • On-board Fusing: Drives include on-board fusing
  • Tach Feedback: Accepts tachogenerator feedback for tighter speed regulation
  • Multi-turn Trim Pots: Minimum Speed and Maximum Speed use 12 turn trim pots for finer tuning
  • Pre-Wired Switches: ON/OFF, SIGNAL/MANUAL

Technical Data

  • 1.37 Form Factor
  • 1% Base Speed Regulation over 60:1 Speed Range
  • 0.1% Base Speed Regulation over 80:1 Speed Range with Tach

Trim Pots

  • Maximum Speed
  • Minimum Speed
  • Acceleration
  • Deceleration
  • Current Limit
  • IR Compensation
  • Tach
Introduction to the MM301A Series
MM301A Series Potentiometer Wiring
MM301A Series Signal Input Wiring