turck BL20 Series - 8.7 Analog input module, 4 AI, voltage;current

Analog Input Modules
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142
8.7 Analog input module, 4AI, voltage/current
Fig. 140: BL20-4AI-U/I
Fig. 141:
Block Diagram
logic
24 module supplyV DC 5 module busV DC
galvanic isolation
R < 62 O in current mode
field
A/D converter
+ multiplexer
Reference
24 V DC
GND
R > 98,5 kO in voltage mode