Page 105 - Bürkert

Control Electronics for Solenoid Control Valves

8605

• Microprocessor-controlled electronics
• Selectable input signal
• Adjustable PWM frequency
• Optional RS232 or RS485 interface

The digital control electronics, Type 8605, serves to operate valves in the Envelope Dimensions [mm] (see datasheet for details)
power range from 40 - 2000 mA. The electronics converts an external
standard signal into a pulse-width modulated (PWM) signal with which D
the opening of the valve and hence a fluidic output parameter (e.g. flow
Version with plug M12
rate) can be infinitely varied. An internal current control with the duty
cycle factor of the PWM signal as control variable ensures that every
value of the input signal, irrespective of the thermal condition of the coil,
is unambi guously assigned a given value of the effective coil current.
Compared to DC operation of solenoid control valves the PWM operation
C
improves, among others, their sensitivity and hysteresis. A display and B
operating keys allow the electronics to be easily adapted to a particular
solenoid control valve and to the concrete conditions of an application.
A B C D
A 45 69 41.5 32.4
Technical Data
Operating voltage 12V DC or 24 V DC D
Voltage tolerance ±10%
Residual ripple <5% Version with screwed
Power consumption approx. 1 W (without valve) conduit entry (PG)
Output current (valve) Max. 2 A
Ambient temperature –10 °C to 60 °C
Input signal 0-20 mA, 4-20 mA or
0-5 V, 0-10 V (configurable)
C
Input impedance <200 Ω (with current input) B
>20 kΩ (with voltage input)
Output signal PWM signal – frequency adjustable from 80 Hz to 6 kHz
for valve control A B C D
Ramp function Time variable from 0 to 10 s A 45 68.5 41.5 32.4
Version Cable plug for direct installation (with PG or M12 connection)
DIN-rail version (DIN EN 50022)
Protection class Cable plug – IP65 DIN-rail
DIN-rail – IP40 D
Housing material Cable plug – Polyamide / PC
DIN-rail – Polyamide / PBT

C

A
A B C D
B 96 27 48.3 66

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