Analog modules
6.16 Analog IO module SM 334; AI 4/AO 2 x 8/8 Bit; (6ES7334-0CE01-0AA0)
S7-300 Module data
478 Manual, 06/2017, A5E00105505-AJ
Wiring: 4-wire transducers for current measurement and voltage output
Analog-to-Digital Converter (ADC)
Inputs: Current measurement with 4-wire transducer
Digital-to-Analog Converter (DAC)
Figure 6-51 Wiring and block diagrams