Burkert Type 8642 - Manual (Page 6)

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english
2 GENERAL DESCRIPTION
I/O Box for driving process valves with 6520 NAMUR type valves:
•
Driving of four Type 6520 valves (PTB No. Ex-97.D.2089x):xx
• Connection of two sensors per valve
NOTE Max. line resistance to the sensors and valves: 20
Ω
The values of the capacity and inductance are specified in the
conformity certificate.
series resistor
Fig. 1: Circuit diagram with NAMUR sensor and protective resistance
N