Regulator Board

The ALR02 regulator board was designed to be adaptable to a variety of requirements imposed by different applications from power supply regulation and protection to AC controllers or soft-start motor starters.

Part No. 60.0043

Functions of the Regulator Board

Ø The regulator board contains 2 independently configurable regulators and a very stable internal reference.

Ø The feedback current value input can be switched from shunt to current transformer.

Ø Prescribed value ramp-up/ramp-down circuitry with independently adjustable for the up and down ranges. The standard

control circuit integrator prevents transformer saturation for step function signal changes and provides stable operation when

using any of the optional regulator features.

Ø Contains shutdown protection in case of overvoltage and overcurrent (electronic fuse), both adjustable.

Ø Accepts the output from any conventional instrument (e.g. temperature controller) in a integrated system: 1-5mA, 2-10mA,

and 4-20mA, all at an input resistance which results in approximately a 5Vdc signal. A 0-10VDC input into 1Kohms is also

available for use with either a process control signal or a manual control potentiometer.

Ø Reference supply - a 10VDC reference source regulated to +0.5% is available for use in energizing a manual control

potentiometer.

Specific Features

Ø BIAS SUPPLY Present - Two green LEDs.

Indicate the + 15 volt presence.

Ø RAMP UP adjustment potentiometer.

Adjusting the potentiometer clockwise will

increase the response of the power supply

to an upward adjustment of the voltage

regulation control.

Ø RAMP DOWN adjustment potentiometer. Adjusting the potentiometer clockwise will increase the time it takes the power

supply to react to a downward adjustment of the voltage regulation control.

Ø VOLTAGE FEEDBACK POTENTIOMETER. It is used to set the maximum desired voltage and the sensitivity of the power

supply to the voltage regulation control. Clockwise adjustment decreases voltage.

Ø CURRENT FEEDBACK POTENTIOMETER. This sets the maximum current output. Clockwise adjustment decreases

current.

Ø OVERTEMPERATURE Indicator - Yellow LED (leftmost). It is lit in the event of temperature exceeding design specifications.

It will light for SCR, or transformer overtemperature conditions.

Ø OVERVOLTAGE Indicator - Yellow LED (second from the left ) In the event the output exceeds the limit set by the

potentiometer to the right, it will turn on. Adjusting the potentiometer can set the sensitivity to overcurrent. Clockwise

decreases the threshold for a trip.

Ø OVERVOLTAGE SHUTDOWN Indicator - Yellow LED (third from the left). This is activated in the event the output voltage

exceeds the preset limit. The limit is set by the potentiometer to the right of the LED. Turning the potentiometer clockwise

decreases the threshold for a trip.

Ø UNDERVOLTAGE Indicator - Yellow LED (fourth from the left). This is illuminated in the event the output voltage is under the

preset limit. The limit is set by the pot to the right of the LED. Turning the pot clockwise decreases the threshold for trip.

Ø This assembly is normally sold with its companion firing circuit encased in a modular enclosure that is din rail mountable as

shown above.

Ø The assembly requires input control voltages provided by PCTI's Bias Power Supply.

For more information, applications assistance or price and availability, contact us now.