Introduction - Omega CN4420 Series Manual

INTRODUCTION

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The OMEGA CN4420, CN4520, CN4620, and CN4720 Series controllers
are economical process controllers that accept temperature or process
inputs, and have sophisticated control capabilities, providing on/off
control, PID, or autotune PID, with Fuzzy Logic. The controllers have
common features, but differ in panel-size requirements. They are avail-
able with mechanical relay, 24 VDC SSR driver, or 4-20 mA output. They
also come with an 8-segment ramp/soak function.
The CN4420 units have single digital display for indication of process/
setpoint values. These are available with a single control output and
optional process alarm. They are used in conjunction with a socket.
The CN4520, CN4620, and CN4720 units have dual digital displays for
simultaneous indication of process value and setpoint. These units are
available with either single or dual outputs; dual output models can be
used for heat/cool, heat/heat or cool/cool control. Options available
include dual alarms (user-selectable between high/low and deviation
action), as well as an inoperative-heater alarm. The heater alarm is a
1A mechanical relay that is triggered when the heater current trans-
former senses that the heater is not getting power.
2