mc series of micro-controlled products - crydom

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MC Series of Micro-controlled Products

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Micro-Controlled SSR’s

Crydom has released a series of SSR’s incorporating various Microprocessor controlled functions built in to one package.

Phase Angle Controller

Temperature Control

Soft-start / Soft-stop SSR

Series MCPC

•Microprocessor based burst-fire controller / SSR•Ratings from 25A to 90A @ 48-530 VAC•Low-voltage, current, or potentiometer control•Output status indicator•Separate output enable / disable control•Two time-base periods available

Series MCTC

•Microprocessor based temperature controller / SSR•Ratings from 25A to 90A @ 48-530 VAC•Direct J or K thermocouple input•Voltage or current controlled setpoint•Separate output enable / disable control•Open thermocouple protection•LED status indicators

Series MCS

•Microprocessor based soft-start / soft-stop controller•Ratings from 25A to 90A @ 48-530 VAC•Low-voltage, current, or potentiometer control•Output status indicator•Adjustable ramp rates

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Newest MC Series Release

Burst Fire ControllerSeries MCBC


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Common Features to all MC Series Products

Each MC version is available with outputs rated 25, 50 and 90 amp, and line voltage ratings of 48 through 530 Vac. (Note that some versions are voltage range specific.)

The ultimate application is used to select and apply the desired voltage and current range exactly like a standard SSR. (Heatsinking, derating, etc.)

The standard S1 package is used for all versions, keeping the mounting consistent with what our SSR customers are used to.

Each requires a very low current unregulated logic supply to provide processor power. (28 to 30 ma at 8 to 32 Vdc.)

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Typical Specifications (Datasheets)

Highlights, Electrical Specs and Part

Number Construction

Mechanical Dimensions and Derating Curves

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Phase Angle ControllerSeries MCPC


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Typical Wiring…

Load

Logic Connections

Line source

(TC Connection on MCTC)

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MCPC Highlights

Ideal for Tungsten Lamp dimming, Resistive Heating Control, and Universal Motor Control.

Significant innovative feature is that there is no need to connect the MCPC to both sides of the line source. (Usually required to synchronize the line phase with the control.) Only need access to one side of the line. (Facilitates remotely locating the module close to the load.)

Available with an internal potentiometer option for output adjustment when a remote input is not needed.

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MCPC Operation

Time

AnalogControlSignal

Outputvoltageto load

AC Supply

Min

Max

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MCS Highlights

Available in 3 basic types:

Soft start

Soft Stop

Soft Start and Stop

Designed to provide an adjustable gradual application or shutdown of power that reduces surges on startup of loads, along with reducing EMF surges on load turn-off.

As with the MCPC, an internal potentiometer option is available.

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MCS provides a phase angle control output that smoothly ramps up or down, (or both), to vary the power to the load.

Soft-start / Soft-stop SSRSeries MCS

•Microprocessor based soft-start / soft-stop controller•Ratings from 25A to 90A @ 48-530 VAC•Low-voltage, current, or potentiometer control•Output status indicator•Adjustable ramp rates

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MCTC Highlights

Unique self-contained temperature control and power SSR in one package.

Requires only a thermocouple and a logic supply to provide a complete closed loop temperature control system.

Available in 5 temperature ranges including one for refrigeration, (-100F to +100F).

The refrigeration option includes short-cycle compressor protection built in. No need for the customer to separately provide their own time delay relay.

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Typical Wiring…

Load

Logic Connections

Line source

(TC Connection on MCTC)

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Temperature Control

Temperature ControlSeries MCTC

•Microprocessor based temperature controller / SSR•Ratings from 25A to 90A @ 48-530 VAC•Direct J or K thermocouple input•Voltage or current controlled setpoint•Separate output enable / disable control•Open thermocouple protection•LED status indicators

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Terminal #4

Terminal#1

+Vdc

Gnd

Enable

Setpoint Adjust

DCSupply

10k to 50k pot for Options A, B, or C

Wiring Example using a potentiometer for setpoint adjustment.

Wiring Example using fixed resistors for pre-set temperatures. (i.e. a front panel selector switch for end user adjustment.)Terminal

#1+Vdc

Gnd

Enable

Setpoint Adjust

DCSupply

Low

Med

High

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CMD at 54 Arms

0

20

40

60

80

100

120

140

1 24 47 70 93 116 139 162 185 208 231 254 277 300 323 346 369 392 415 438 461 484

Samples

Cel

sius

SCR 1SCR 2BPLow TankM id Tank

Water heating application using a mechanical thermostatic switch to control a Crydom CMD2490 Solid State Relay.

Note the water temp

variation

(Purple line)

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0

20

40

60

80

100

120

140

deg

C Die ADie BWater Temerature

Much more even water temperature

(Yellow line)

Same application using the MCTC as the control.

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• Very useful for effectively varying power levels without creating “Electrical Noise” (vs. phase angle control).

•Available with 2 time base periods,10 and 20 AC cycles, providing 5% and 2.5% step resolution.

Burst Fire Control

Burst Fire ControllerSeries MCBC


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MCBC Burst Fire Control Theory

Voltage across Load

10 Cycle PeriodAll 10 cycles on, = 100% power10 Cycle Period5 cycles on, = 50% power10 Cycle Period2 cycles on, = 20% power

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Bottom Line Benefits

The customer is NOT paying for extra “Bells and Whistles” on the MC series that they do not need…

Displays that are buried within equipment and never used.

Various option settings that are useful only in development work, but are wasted cost in production systems.

Requiring multiple modules vs. the MC series single package. (Ref. Crydom’s CPV and SST control / SSR systems for a comparison.)

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Customized Products Based on Standard MC Series

Technology

Can adapt the “Standard” MC product functions fairly easily and quickly.

Adds more value to the product for OEM customers.

Saves the Customer additional components and costs.

Don’t be afraid to “Ask” if an idea is possible.

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Customized Products evolved from the MC Series Technology

Combined MCPC and MCSS based.

MCPC Unit with built in 2 second soft start feature.

From relatively simple…

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…to slightly more complex MCTC based adaptations…

Special temperature ranges for Food Warming Cabinets between 100 to 250 degF (38 to120 degC)

Low current version with internal power supply for valve control.

“Point of use” hot water heating. Temperature sensing using thermistor vs. thermocouple


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…to much more complex functions. Here using an MCBC based output.


HeaterLoadL

Cook Power

24 VacSupply

Clamshell Down Switch

N

Boost timeStandby Power

CY6949

Output90 –280 vac

SSR Output

Clamshell Switch Input Open

0 Vac

Closed24 vac

100% Pwr

0 %Pwr

Adj.BoostTime

Adj. Cook Pwr

Adj. Stdby Pwr

Main Power on

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Frequently Asked Questions on the MC Series

Is the P2 connection common for all of the inputs? (P1, P3, and P4)? Yes, the P2 connection is common to the other input terminals.How does the enable input work? With Logic power applied (P1), the internal microprocessor is running. Using the Enable input allows a quick on and off control of the output without having the microprocessor going through a “start-up” sequence. To “enable the output” a positive voltage, (up to the maximum allowed on P1), is applied.Is it a requirement to use a potentiometer for control? Or can an external analog source be used? Any external analog source can be used. The potentiometer is shown just as an example on the datasheets.On the “A” “B” and “C” options, can the Analog input have higher than the maximum control voltage applied? Yes. The maximum that can be applied is the P1 maximum value of +32vdc. Of course, once the maximum analog input value of the particular unit is reached, (I.e. for the “A” option that level is 5vdc), the output function will be at maximum.)

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Can the analog voltage input on the “A”, “B”, and “C” options be paralleled for multiple unit operation from a single source? Yes.

What about multi-phase operation using the MCPC for heater control? Since the MCPC references the zero-crossing point of the AC sine wave to position the firing point of the output, each of the phases needs an MCPC. However, as noted in the previous question, the inputs of the individual MCPC’s can be paralleled.

Can the “D” option, (4-20 ma control), be wired in series for multiple unit control? Since the analog input shares a common reference terminal with the Enable, and Logic power connections, no.

Will there be additional application notes generated specific to the MC series? Definitely. Application notes are planned to address questions relating to multi-phase use of the MC sereis.

Frequently Asked Questions on the MC Series

mc series of micro-controlled products - crydom

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