1/01 UDC3300 Limit Controller Product Manual 1
Section 1 – Overview
1.1 Introduction
Function
The UDC3300 Universal Digital Limit Controller is a microprocessor-
based stand-alone controller. It combines the highest degree of
functionality and operating simplicity offered in a 1/4 DIN size controller.
With a typical accuracy of ±0.20% of span, the UDC3300 is an ideal
controller for limiting temperature and other process variables in
numerous heating and cooling applications, in metal working, food, and
pharmaceuticals, and testing and environmental work.
Easy to read displays
The dedicated vacuum fluorescent displays with English prompts make
the operator interface easy to read, understand and operate.
Programmed sequences of displays assure quick and accurate entry of all
configurable parameters.
Easy to operate
Simple keystrokes let you select input and range configuration, set the
operating parameters that meet your process control needs now, and
change them later to meet new ones.
The tactile keyboard provides positive operator feedback. Self diagnostics,
fault tolerant design and keyboard security provide maximum assurance of
trouble-free operation.
Latching relays
This limit controller has a latching output relay which is de-energized
whenever the PV goes above (high limit) or below (low limit) a selected
setpoint value. When the limit is exceeded (high or low), the lower display
alternately indicates “the limit control setpoint value” and the word
“limit.”
Reset of relay
Reset of the latching output relay is made through a [RESET] key on the
front of the controller or an external switch (if the option is present).
Alarm relay
Two additional non-latching alarm relays with two setpoints each alert
you to critical process conditions.
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