X20(c)SC2212
16
Data sheet V1.141 X20(c)SC2212 Translation of the original documentation
7.6 Using the same pulse signals
Input 2
Input 1
Pulse 1
Pulse 2
Input n
Input 3
Input 2
Input 1
Pulse 1
Pulse 2
Input n
Input 3
Figure 10: Using the same pulse signals
When using the same pulse signals for different inputs, they must be isolated from one another. Otherwise, damage
to the cables may cause errors that are not detected by the module.
Danger!
If the same pulse signals are routed in the same cable, damage to the cable can cause cross faults be-
tween the signals to occur that are not detected by the module. This can result in dangerous situations.
For this reason, signal lines with the same pulse signal should be routed in different cables, or you
should implement other error prevention measures in accordance with EN ISO 13849-2:2012.
Danger!
It is especially important to check the wiring when using the same pulse signal for two inputs that are
located next to each other on the terminal. Pay special attention to ensure that poor wiring has not
resulted in the two inputs being connected together.
7.7 Connecting safety-oriented actuators for Type B outputs
SO n +
GND
GND
SO n +
SO n +
GND
GND
SO n +
M
Figure 11: Connecting safety-oriented actuators for Type B outputs
Safety actuators (contactors, motors, muting lamps, valves) that are compatible with module performance data
can be connected directly.
With this connection, the module satisfies Category 4 requirements in accordance with EN ISO 13849-1:2015. Be
aware that this statement applies only to the module and not to the wiring shown. You are responsible for wiring
the actuator in accordance with the required category and the characteristics of actuator.
If the actuators contain an inverse diode or electronic components, then the special instructions in section "Module
behavior when GND connection is lost" must be followed.