Siemens SIMATIC ET 200SP Manual page 32

Wiring
3.1 Terminal assignment and power supply
Switching contact DQ P, DQ T
● The digital outputs are protected against short-circuit.
● The digital outputs are equipped for switching inductive loads with a protective diode.
Note
Connect an external protection element to the relays or contactors to suppress self-
inductance when switching off inductive loads.
We recommend using contactors with integrated protection elements.
You have to supply a voltage source with limited voltage and/or power (SELV, PELV to
EN61010- 1 and EN61010-2-201, Class 2) to the switching elements.
Figure 3-1 Example circuits for the switching contacts
Table 3- 1
Output
DQ T
DQ P
30
Behavior of the outputs DQ T and DQ P
Scenario
CPU STOP during a charging process (state C)
Module is pulled during a charging process (state C)
PROFINET interruption between CPU and interface module (IM) during a
charging process (state C)
CPU STOP during a charging process (state C)
Module is pulled during a charging process (state C)
PROFINET interruption between CPU and interface module (IM) during a
charging process (state C)
Technology module TM ECC PL ST (6FE1242-6TM20-0BB1)
Manual, 07/2019, A5E43919893B-AA
Behavior
High resistance
High resistance
High resistance
High resistance
High resistance
Low resistance