End user instructions│ R20│ Chapter 3: Functional safety
CHAPTER 3: FUNCTIONAL SAFETY
S top f u nction
The safety-related stop function in the radio system complies with EN IEC 61508:2010
SIL3 and EN ISO 13849-1:2015 Category 3 PL e. The stop relays on the receiver unit
are controlled by the stop button on the transmitter unit. When the stop button is pressed,
the stop relays interrupt the power to the safety-related application. The complete end
user system, including the radio system, enters a safe state. The default response time
for the stop function is 500 ms.
The stop function is supported by all receivers and transmitters in the Puma range.
Appl icabl e produ cts
The following transmitters are designed to comply with the appointed safety
requirements when used together with a R20 receiver:
l
T24
Instal l ation
The stop relays on the receiver unit must be correctly installed on the end user system, to
ensure that opened/ deactivated stop relays interrupt the power to the safety-related
application. The safety level of the stop function can only be credited when integrated in a
complete end-user system that complies with equal or higher safety levels.
C onf igu ration
The default configuration of the receiver unit complies with the appointed safety
requirements. Configuration of the response time for the stop function (by default 500 ms)
must be justified with a valid risk analysis in order to maintain the safety levels.
Achieved perf ormance l evel (PL)
Safety function
MTTFd (years)
DCavg(%)
Category
Achieved PL
Stop function
100
99
3
e
10
ED-PM-RX102-EN-v02
