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The continuous signal of the yellow LED signals the actuator detection; the flashing of the yellow LED signals that the
safety sensor is actuated in the hysteresis area.
Recommended Adjustment
F
Align the safety sensor and actuator at a distance of 0.5 x s
The correct functionality of both safety channels must be checked by means of the connected safety-monitoring
module.
5 Electrical connection
5.1 General information for electrical connection
The electrical connection may only be carried out by authorised personnel in a de-energised condition.
2
The safety outputs can be integrated into the safety circuit of the control system. For applications of PL e / category 4
to EN ISO 13849-1, the safety outputs of the safety sensor or of the sensor chain must be wired to a safety monitoring-
module of the same category.
The required electrical cable fuse protection must be integrated in the installation.
Protection is not required when pilot wires are laid. The cables however must be separated from the supply and energy
cables. The max. fuse rate for a sensor chain depends on the section of the connecting cable of the sensor.
Requirements for the connected safety-monitoring module:
dual-channel safety input, suitable for p-type sensors with NO function
Information for the selection of suitable safety-monitoring modules can be found in the Schmersal catalogues or in the online
F
catalogue on the Internet: products.schmersal.com.
As an alternative to a safety-monitoring module, the safety sensors of the CSS 34F0 or CSS 34F1 series can also be
used as first sensor of a series-wired chain for the direct control and monitoring of safety contactors (refer to operating
manual of CSS 34F0 / CSS 34F1).
If the safety sensor is wired to relays or to non-safety relevant control components, a new risk analysis must be carried
out.
The sensors cyclically switch off the safety output to test them. The safety-monitoring module therefore does not need
to be equipped with a cross-wire short detection. The switch-off times must be tolerated by the safety-monitoring
module. The switch -off time of the safety sensor is additionally extended depending on the cable length and the
capacity of the cable used. Typically, a switch-off time of 250 μs is reached with a 30-m connecting cable.
.
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