Mitsubishi MELSEC-WS series, User Manual

Page: 103 / 152

Chapter 12
100
Technical data
12.2.2 WS0-XTIO safety input/output combined module
Safety-related parameters
This information relates to an ambient temperature of +40 °C, which is normally
used for the statistical calculation of the values.
Safety Integrity Level SIL3 (IEC 61508)
SIL claim limit SIL CL3 (IEC 62061)
Category
*1
For single channel outputs with
test pulses enabled for all safe
outputs (Q1…Q4) Category 4 (EN/ISO 13849-1)
For single channel outputs with
test pulses disabled for this or
any other safe output (Q1…Q4) Category 3 (EN/ISO 13849-1)
For dual channel outputs with or
without test pulses disabled for
this or any other safe output
(Q1…Q4) Category 4 (EN/ISO 13849-1)
Performance Level PL e (EN/ISO 13849-1)
PFHd (mean probability of a
dangerous failure per hour)
*1
For single channel outputs 4.8 × 10 –9
For dual channel outputs 0.9 × 10 –9
T
M
(mission time) 20 years (EN/ISO 13849)
*2
*1 Applies for single channel outputs and for dual channel outputs.
*2 If safe outputs are used without test pulses, at least once per year either all safe outputs without test
pulses have to be switched off at the same time for at least 1 second or alternatively a power reset
has to be performed.
Table 58:
Data sheet WS0-XTIO