Process Connection - Inputs / Outputs; Control Functions - Siemens Simatic RTU303xC Series Operating Instructions Manual

Application and functions

1.4 Process connection - inputs / outputs

The changeover to the Service mode as the following effect:
● Turning on the LEDs that were turned off in the other operating modes to reduce energy
consumption.
● Activation of the LAN interface
With the LAN interface of the RTU activated, a configuration PC can access the Web
pages (WBM) of the RTU.
The Service mode is intended for commissioning and for service purposes on site, for
example, to replace the battery.
The service mode can be active parallel with the update mode and communication mode.
The service mode can also be activated permanently. Remember that this increases the
energy consumption of the RTU significantly.
1.4 Process connection - inputs / outputs
Inputs, outputs
The RTU provides the following inputs and outputs for the process connection:
● 8 digital inputs
The first two digital inputs can also be configured as fast counter inputs up to 5 kHz.
● 4 digital outputs, designed as bistable mechanical relays
● RTU3031C: 4 digital outputs, designed as fast electronic relays
● 4 analog inputs
The input AI0 can also be monitored in sleep mode.
● Up to 16 digital or analog inputs via the extension board
You will find details in the section Interfaces and connectors (Page 51).
1.5

Control functions

Control functions
The control functions of the RTU are implemented by creating a user program made up of
program blocks. The blocks are displayed graphically and programmed on integrated Web
pages (WBM), see section Program (Page 213).
The linking with inputs and outputs and the programming of function values is performed
conveniently with drop-down lists or by entering values.
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Operating Instructions, 06/2019, C79000-G8976-C382-06
RTU303xC