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Ohio Magnetics

Magnet Controllers

Ohio's magnet controllers feature robust contact tips and heavy-duty movable parts. Parts interchangeability between Ohio controllers ensures that customers need a minimum of controller-related inventory. Ohio's controllers were designed to maximize worker productivity, with options for both an automatic drop and a manual drop.

Automatic Drop: In automatic drop mode, the controller automatically senses the precise amount of reverse current required to clear the magnet load. The reverse current adjustment provides for a fast, clean drop of the magnet over a complete range of magnetic material with one movement of the master switch or push button. The drop circuitry is made to function by a set of adjustable timers that control drop time.

Manual Drop: In manual drop mode with low-amperage magnets, workers gain precise control over plates and the ability to dribble scrap. The controller allows for partial dropping of the load by controlling the amount of reverse current to the magnet through discharge resistors. A Drop position on the master switch or push button is spring-returned to Off, giving the operator complete control of the drop cycle. 

Model CDS

Model MC-1A / MC-1.5A / MC-2A Auto / Manual Drop Magnet Controllers

Optimizer™ Solid-State IGBT Magnet Controller

Model RD1W Automatic Drop Magnet Controller

Model RD2A Auto / Manual Drop Magnet Controller

Model RD3A Ohio Duty-Cycle™ Magnet Controller

Operator Control Switches

All electromagnet controllers serve the same functions of energizing and de-energizing the magnet. They dissipate the stored inductive energy in the magnet coil, apply a controlled amount of reverse current to de-magnetize the magnet, and turn "off" completely the power to the magnet.

Model CDS

The Model CDS magnet controller is the smallest controller in Ohio's line, targeted at locations with space constraints, to manage magnets requiring up to 20 A.

Features

• Smallest available Ohio controller, at approx. 12"H x 14"W x 10"D (305 x 355 x 255 mm)

• For use with magnets requiring up to 4,600 watts

• Operating range: 1-20 A (manual drop), 5-20 A (automatic drop)

• 230 VDC standard

• Parts interchangeability with larger Ohio controllers, to cut inventory costs

• Automatic drop and manual drop operating modes, for maximum operating flexibility

CDS Manual for installation, operation, service and parts information, in PDF format

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Model MC-1A / MC-1.5A / MC-2A Auto / Manual Drop Magnet Controllers

The Model MC-1A Ohio Duty Cycle™ magnet controller is a wide range controller used for magnets requiring 115 / 230 volt DC operation and 20 to 100 cold magnet amps.  The Model 1.5A and MC-2A controllers offer heavy-duty magnet control for magnets whose cold current ranges from 70-130A and 100-150A, respectively.

Features

• New lift / drop interlock prevents resistor bank overheating

• 230 volts DC operation (also available in 115 volts DC operation)

  • MC-1A:  20-100 cold magnet amps

  • MC-1.5A:  70-130 cold magnet amps

  • MC-2A:  100-150 cold magnet amps

• Available in standard automatic or optional manual drop
• Rugged steel case construction
• Heavy-duty parts interchangeable with other Ohio controllers, to cut inventory costs

MC1A Manual for installation, operation, service and parts information, in PDF format

MC1.5A and MC2A Manual for installation, operation, service and parts information, in PDF format

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Optimizer™ Magnet Controller

The Optimizer™ magnet controller offers wide-ranging control for all magnets through solid-state, microprocessor-driven IGBT, enabling user-adjustable parameters and choices among multiple, standard voltage DC operation.  Through its operating modes and existing 2- or 3-position operator controls, the Optimizer™ offers optimum lift (100% voltage applied in less than 50 ms), hold (lift current automatically reduced to optimized holding current), dribble (magnet current slowly reduced), drop (instant discharge through IGBT discharge, eliminating voltage spikes), and clean (instant reversal of magnet current, eliminating voltage spikes).  The adjustable parameters allow Optimizer™-controlled magnets to run cooler and more efficiently, improving productivity, profitability and longevity.  Choose from among three models:  M350; M200; and M100.

Features

• Solid-state IGBT magnet control

• Adjustable current and times for all operating modes, to maximize performance, optimize production and prolong magnet life

• Multiple operating modes, to improve lift, hold, dribble, drop and clean

• Cool-running operation and energy efficiency

• Ability to use controller with existing magnets and operator controls or with new equipment, in 12VDC, 24VDC, 240 VDC and 120VAC operator control voltages

• Offered in 350-amp, 200-amp and 100-amp versions, complete in a NEMA12 enclosure

Optimizer literature

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Model RD1W Automatic Drop Magnet Controller

The Model RD1W automatic controller is a “wide-range” magnet controller used for magnets from 100 A down to 20 A, cold current. A reverse current adjustment provides adjustable drop time on the load over a complete range of magnetic materials with one movement of the master switch or push button. The RD1W controller uses many parts interchangeable with both higher- and lower-range controllers for lower inventory costs.

RD1W Manual for installation, operation, service and parts information, in PDF format

Features

• “Wide range” controller, at approx. 21"H x 16"W x 15-1/2"D (530 x 405 x 395 mm)

• For use with magnets requiring up to 23 kW

• Operating range: 20-100 A (automatic and manual drop)

• 230 VDC standard

• Parts interchangeability with other Ohio controllers, to cut inventory costs

• Automatic drop and manual drop operating modes, for maximum operating flexibility

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Model RD2A Auto / Manual Drop Magnet Controller

The Model RD2A magnet controller is Ohio’s hard-working, workhorse controller, a heavy-duty unit used for magnets whose cold current ranges from 100 A to 150 A DC.

RD2A Manual for installation, operation, service and parts information, in PDF format

Features

• “Wide range” controller, at approx. 22-3/8"H x 17-3/4"W x 17-3/8"D (570 x 450 x 440 mm)

• For use with magnets requiring up to 34.5 kW

• Operating range: 100-150 A (automatic and manual drop)

• 230 VDC standard

• Parts interchangeability with other Ohio controllers, to cut inventory costs

• Automatic drop and manual drop operating modes, for maximum operating flexibility

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Model RD3A Ohio Duty-Cycle™ Magnet Controller

The Model RD3A magnet controller is Ohio’s highest-rated controller, featuring robust contact tips and heavy-duty movable parts. RD3A’s amperage rating allows this controller to operate Ohio’s and competitors’ largest magnets. And, of course, it cuts inventory costs since all parts are interchangeable with Ohio's larger controllers.

Features

• Heavy-duty-cycle controller, at approx. 34-1/2"H x 28"W x 14"D (875 x 710 x 355 mm)

• For use with magnets requiring up to 46 kW

• Operating range: 100-200 A (automatic and manual drop)

• 230 VDC standard

• Parts interchangeability with other Ohio controllers, to cut inventory costs

• Automatic drop and manual drop operating modes, for maximum operating flexibility

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Operator Control Switches

Ohio offers a variety of operator control switches to meet the personal preferences of your workers. In addition to a push-button control switch, Ohio offers a standard lever-type switch and reduced voltage packages.

Push Button Type Switch

• Red Lift button; Green Drop button

• Dimensions: 5-3/16"H x 2-13/16"W x 4-1/4"D (130 x 70 x 110 mm)

Standard Lever Type Switch

• 3-position drum switch

• Spring return lever from drop to center position

• Dimensions: 4-5/8"H x 4-7/16"W x 5-3/4"D (120 x 110 x 145 mm)

• Optional Heavy-Duty Master Switch: Dimensions: 11-3/4"H x 6"W x 7-1/4"D (300 x 150 x 185 mm)

Reduced Voltage Package

• 12 or 24 V

• Cab-mounted or joystick-mounted lift/drop buttons