Wiring Examples For Series-Wiring - schmersal RSS 36-D-ST5 Manual

Cable design
The wiring capacitance of the connecting cable of the safety sensor must not exceed 50 nF.
Depending on the strand structure, normal unshielded 200 m long control cables LIYY 0.25 mm² to 1.5 mm² have a
wiring capacitance of approx. 20 ... 50 nF
On wiring SD devices, please pay attention to the voltage drop on the cables and the current carrying capacity of the
F
individual components.
Accessories for the series-wiring
F
For convenient wiring and series-wiring of SD components, the SD junction boxes PFB-SD-4M12-SD (variant for the field)
and PDM-SD-4CC-SD (variant for control cabinet on carrier rail) are available along with additional comprehensive
accessories. Detailed information is available on the Internet, products.schmersal.com.

5.3 Wiring examples for series-wiring

Series-wiring can be set up. In the case of a series connection, the risk time remains unchanged and the reaction
time increases by the sum of the reaction time of the inputs per additional unit specified in the technical data. The
number of components is only limited by the external cable protection according to the technical data and the line
loss. Series-wiring of up to 31 RSS 36 ... SD components with serial diagnostics is possible.
The application examples shown are suggestions. They however do not release the user from carefully checking
whether the switchgear and its set-up are suitable for the individual application. The application examples shown
are suggestions.
Wiring example 1: Series-wiring of the RSS 36 with conventional diagnostic output
The voltage is supplied to both safety inputs of the last safety sensor of the chain (considered from the safety-
monitoring module).
The safety outputs of the first safety sensor are wired to the safety-monitoring module. The diagnostic output can
be connected for instance to a PLC.
Y1 and Y2 = Safety outputs → Safety monitoring module
Wiring example 2: series-wiring of the RSS 36 with serial diagnostic function
In devices with the serial diagnostics function (ordering suffix -SD), the serial diagnostics connections are wired in
series and connected to a SD-Gateway for evaluation purposes. The voltage is supplied to both safety inputs of the
last safety sensor of the chain (considered from the safety-monitoring module).
The safety outputs of the first safety sensor are wired to the safety-monitoring module. The serial Diagnostic
Gateway is connected to the serial diagnostic input of the first safety sensor.