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2
FUNCTIONS
The temperature controller type 8625-2 is designed, in connection with a pro-
portional valve and a temperature sensor, to keep the temperature in a flowing
medium constant or to follow a given setpoint profile.
The functionality of the device is characterized by:
•
Compact design, capable of direct installation on the proportional valve.
•
May be combined with valve types 6022, 6023, 6024, 6223, 2832, 2834.
•
Controller ouput directly to proportional valve in the form of a PWM signal;
this minimizes hysteresis and optimizes the control performance.
•
Connection of PT100 sensor of any type to the actual value input (e.g.
types ST20 - 24).
•
The standard signal input can be scaled to the control range actually
required (standard model only).
•
Setting of setpoint value via standard 4 - 20 mA or 0 - 10 V signal, keypad
or bus.
•
Digital control with a PI control algorithm and settable control parameters.
•
Applications in heating and cooling possible.
•
Display of setpoint or actual values (to choice) on an LCD display.
•
Configuration with three keys.
For measured variables such as pressure, flow rate, conductivity,etc. we offer
suitable controllers, e.g:
•
Type 8623-2
•
Type 8624-2
for flow rate control with frequency input for the sensor
for pressure, flow rate, conductivity,etc. with standard
signal input for connection of a transmitter.
8625-2 Standard - 5
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