Siemens Simatic S7-300 - Page 373

Analog modules
6.16 Analog IO module SM 334; AI 4/AO 2 x 12 bit; (6ES7334-0KE00-0AB0)
S7-300 Automation System Module data
Manual, 08/2006, A5E00105505-04
6-139
Wiring: Resistance measurement, voltage measurement and voltage output
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Figure 6-44 Wiring and block diagrams