Scanreco – Service Manual G6 Radio Remote Control System
4.4. Correct Actuator Activation
The Scanreco remote control system shall indicate safety classified proportional actuators
active or not active state correctly.
Product lifetime SISP
TM
contains no lifetime limiting components, therefore the PFH figures are
valid for up to 12 years, according to IEC 61508.
Passive Stop: A passive stop is initiated in the receiver if there is no communication between
the receiver and the transmitter for more than 500 ms. The possible cause might be a corrupted
radio link, no battery power, or that the transmitter has been switched o without STOP
button activation.
Safety parameters Value
Safety integrity level SIL 3
Probability of dangerous failure per hour PFHd = 4,2 x 10-8(= λdu)
Fraction of total failure rate with dangerous and detected consequence λdd = 4,19 x 10-6
Safe failure fraction SFF = 99,5 %
Diagnostic coverage DC = 99 %
Level of hardware fault tolerance HFT = 0
Proof test interval Product lifetime
Diagnostic test interval Continuous
5. Integrators Implementation
The Scanreco remote control system have the following safety classified interfaces that must
be used by the integrator to comply with above stated values for each safety function.
5.1. Stop Function
Signal STOP
Signal moves to Vin when STOP button is released and system is running without fault. Signal
moves to Zero as soon as STOP button is pressed.
Signals LOOP_IN/OUT
LOOP_IN and LOOP_OUT are connected when STOP button is released and system is running
without faults. Loop function is based on two high side switches mounted in serial.
CAN safety
Indication for STOP function is available in the safety CAN SRDO (D0 and D1). It is the
responsibility of the SRDO consumer to validate all SRDO information (Missing/lack of CAN
communication must be handled by consumer).
NOTICE!
The Scanreco responsibility for the safety classified functions ends by the receiver connector.
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