Precision Control Systems 915 - Manual (Page 4)

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Introduction
General Description
The Model 915 power control system is a complete power control “solution” featuring a number
of elements integrated into a single, ready-to-install package. The Model 915 is a single-phase
power control system available in a variety of configurations from 120 to 480 volts and rated at
20-, 40-, or 70-amps. These systems are ideally
suited for many industrial power control
applications and have been specifically
optimized for use with Research Inc. infrared
heating systems.
Standard Features
Standard features include:
• Local 10 turn potentiometer with digital dial for precise manual control of load voltage.
• Remote control capability with a 0-5 VDC or 0-20 mA signal.
• Heater power switch with remote interlocks. The load voltage may be enabled or
disabled without turning off the main discount switch.
• Heater ON/OFF switch controls an AC contactor to remove power from the SCR
controller and the load.
• Cooling power switch to control air or water cooling flow.
• Cooling flow interlock contacts. Low cooling flow turns off the heater contactor.
• Heater over temperature contacts. Heater over temperature condition turns off the
heater contactor.
• Indicators lights for heater on, cooling on, heater over temperature, optional
temperature controller alarm and lamp-out alarm.
• Fail safe operation of the heater contactor. The contactor will not automatically re-
energize after a power failure, or an alarm condition that shuts down the heater.
• Programmable Logic Controller for operating and alarm logic control.
Section 1