Siemens Simatic RTU303xC Series Operating Instructions Manual page 77

Figure 3-3
For the power supply of the connected actuators, you can use the control outputs X10 or
X11 of the RTU.
Connecting up the analog inputs X40 to X43
You can connect up to 4 analog measuring transducers to the RTU.
The terminal blocks X40 and X42 each serve to control and supply 2 sensors. You specify
the voltage value (12 or 24 V) in the WBM ("Operating mode" > "Power supply").
The terminal blocks X41 and X43 are each used to connect the signal wires of two sensors.
Assignment of the contacts based on the example of terminal block X40 and X41:
● X40
– L+ Control output for sensors 0 and 1
– M
● X41
– 0+ Input "+" of sensor 0
– 0-
– 1+ Input "+" of sensor 1
– 1-
The terminal blocks X42 and X 43 are assigned accordingly for sensors 2 and 3.
Figure 3-4
Depending on the measuring transducer type, make the connections as shown below.
As an example the figures show the connection of a measuring transducer at terminal block
X41 (analog input "0").
RTU303xC
Operating Instructions, 06/2019, C79000-G8976-C382-06
Wiring of digital outputs X32 to X33
Ground for sensors 0 and 1
Input "-" of sensor 0
Input "-" of sensor 1
Wiring of the analog inputs X40 to X43
Connecting up, installation, commissioning
3.7 Connecting up the RTU
77