Safe Limited Speed - OEM Automatic AB
Safe Limited Speed - OEM Automatic AB
Safe Limited Speed - OEM Automatic AB
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Preface<br />
Terminology<br />
Abbreviation Full Term Definition<br />
IGBT Insulated Gate Bi-polar Transistor —<br />
HFT Hardware Fault Tolerance The HFT equals n, where n+1 faults could cause the loss of the safety function.<br />
An HFT of 1 means that 2 faults are required before safety is lost.<br />
HIM Human Interface Module A module used to configure a device.<br />
LM Lock Monitoring —<br />
MP Motion Power —<br />
OSSD Output Signal Switching Device The component of the electro-sensitive protective equipment (ESPE) connected<br />
to the control system of a machine, which, when the sensing device is<br />
actuated during normal operation, responds by going to the OFF-state.<br />
PC Personal Computer Computer used to interface with and program your safety system.<br />
PFD Probability of Failure on Demand The average probability of a system to fail to perform its design function on<br />
demand.<br />
PFH Probability of Failure per Hour The probability of a system to have a dangerous failure occur per hour.<br />
PL Performance Level ISO 13849-1 safety rating<br />
RL Reset Loop —<br />
SDM <strong>Safe</strong> Direction Monitoring —<br />
SFF <strong>Safe</strong> Failure Fraction The sum of safe failures plus the sum of dangerous detected failures divided<br />
by the sum of all failures.<br />
SIL <strong>Safe</strong>ty Integrity Level A measure of a products ability to lower the risk that a dangerous failure could<br />
occur.<br />
SLS <strong>Safe</strong> <strong>Limited</strong> <strong>Speed</strong> —<br />
SMA <strong>Safe</strong> Maximum Acceleration —<br />
SMS <strong>Safe</strong> Maximum <strong>Speed</strong> —<br />
SS <strong>Safe</strong> Stop —<br />
10 Publication 440R-UM004A-EN-P - December 2008
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