Graphic symbols used
To distinguish between the type and importance of the information provided in these instructions for use, graphic symbols
have been used as a reference to make interpreting the information clearer.
Indicates the contents of the various manual sections,
the general warnings, notes, and other points to
which the reader’s attention should be drawn.
Indicates a particularly delicate situation that could
affect the safety and correct working operation of
the controller, or a rule that must be strictly obser-
ved to avoid dangerous situations
Indicates a condition of risk for the safety of the
user, due to the presence of dangerous voltages at
the points shown
Indicates a suggestion based on the experience of
the GEFRAN Technical Staff, which could prove
especially useful under given circumstances
Indicates a reference to Detailed Technical
Documents available on the GEFRAN web site
www.gefran.com
1 • PRELIMINARY INSTRUCTIONS
This section contains information and warnings of a
general nature which should be read before
proceeding with controller installation, configuration
and use.
General Description
The instrument is appropriate for acquisition and control of
systems with high variation speed. It has two main analog
inputs for many applications, including differential measure-
ments.
The inputs can be configured from the keyboard and
accept standard linear signals (as well as custom linearized
signals), signals from pressure probes, load cells, potentio-
meters, TC, RDT.
They represent an exclusive combination of performance,
reliability and applicational flexibility. In particular, this new
line of Gefran temperature controllers is the ideal solution
for application in sectors where performance and service
continuity are important, including:
• pressurecontrolsonextrusionandinjectionpress
lines for plastics
• differentialpressurecontrol
• strengthcontrolontextile,paper,plasticfilm
production lines
• tensioncontrolonwindingstations
The controller also has 4 digital inputs for functions such as
reset, calibration, man/auto, loc/rem, hold, raise/lower (moto-
potentiometer function), parameter set selection, setpoint
selection. The outputs (up to 4) are relay type, with alarm
function.
Up to 3 optional high-resolution (optically isolated) analog
outputs are also available for functions such as control, ana-
log retransmission of peak values, remote setpoints, devia-
tion, alarm setpoints, differential value.
Basic Version Controller (mod. 2500-0-0-0-0-0-X)
• 1 universal input for strain gauge, potentiometer,
thermocouples TC, RTD 2/3 wires and linear
thermocouples, supplied with current and voltage
with accuracy better than 0,1% f.s.
• 2 auxiliary inputs for linear on current and voltage,
potentiometers
• 1 power supply for transmitters
• 4 configurable digital inputs NPN or PNP
• 1 control analog output
• 1 power supply probe selectable for strain gauge,
potentiometers and transmitters
• 4 outputs: OUT1, OUT2, OUT3, OUT4 relay
Options
• 2
th
universal input
(useful for differential measurements)
• 2
th
control analog output
• 1 retransmission analog output
• 4 digital inputs/outputs with configurable function
• 1 serial optoisolated RS485 interface
2 80291G_MHW_2500_08-2010_ENG
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