West Control Solutions Pro-EC44 - Manual (Page 8)

Pro-EC44 2-Loop Graphical Profile Controller & Recorder
Pro-EC44 Product Manual - 59540-1 October 2013 Page 1
1 Introduction
This product is a
1
/
4
DIN size (96 x 96mm front) microprocessor based graphical process
controller, featuring a 160 x 80 pixel, monochrome LCD with dual colour (red/green)
backlight. It operates from 100-240V at 50/60 Hz or 24V-48V AC/DC, depending on the
model purchased. It can measure and control up to two process variables from a variety of
sources such as temperature, pressure, flow and level. Primary and secondary control
outputs are possible for each loop.
Optional features include a second process input, USB interface, remote setpoint inputs
RS485 or Ethernet communications, profile control and data recording. Control options
include cascade, ratio and 3-point stepping valve control. Automatic tuning or 5 stage gain-
scheduling are also available.
The USB Interface option allows uploading or downloading instrument configuration settings
to/from a USB memory stick, for easy configuration of multiple instruments or transfer to/from
the PC configuration software. If the data recorder or profiler options are fitted, recordings
and profile information can be transferred via the memory stick.
The data recorder option allows the user to make recordings of the processes over time.
Recordings can be transferred to a memory stick using the USB interface or downloaded via
one of the communications options.
The Profiler option allows the user to predefine up 255 segments, shared amongst up to 64
Setpoint Profiles. These control the setpoint levels for the control loop(s) over time,
increasing, decreasing or holding their values as required. When combined with the real-time
clock (part of the Data Recorder option) the profiling capabilities are expanded to allow
automatic program start at a defined time and day.
Inputs are user configurable for thermocouple and RTD probes, as well as linear process
signal types such as mVDC, VDC or mADC. Two-point calibration or multipoint scaling can
compensate for errors or non-linear signals. Output options include single or dual relays,
single or dual SSR drivers, triacs or linear mA/V DC. These can be used for process control,
alarms/events or retransmission of the process variable or setpoint to external devices.
Transmitter power supply options can provide an unregulated 24V DC (22mA) auxiliary
output voltage, or a 0 to 10VDC stabilised excitation for external signal transmitters.
Up to 7 alarms can be defined as process high or low, deviation (active above or below
controller setpoint), band (active both above and below setpoint), rate of input change,
control loop, PID power or signal break types. Alarm status can be indicated by lighting an
LED, changing the display backlight colour or viewing the active alarm status screen. These
alarms can be linked to any suitable output.
Configuration for basic applications is possible using the easy Setup Wizard run
automatically at first power-up or manually later. Access to the full range of parameters is via
a simple menu driven front panel interface, or the PC based configuration software.