Hitachi SJ Series Safety Function Manual page 24

Chapter 5
2. A fail-safe cable routing (The requirement of
ISO13849-2 table D.4 to be met. One of the following
measures needs to be adopted)
 Permanently connected (fixed) and protected
against external damage, e.g. by cable ducting or
 Use of separate multicore cable
 Within an electrical enclosure, with both
conductor and
requirement of IEC 60204-1
 Individually shielded with earth connection
3. Using an external device for grounding fault detection
In case of connecting a device applies diagnostic test pulses
on STO input lines, the width of the test pulse (width of OFF
pulse) must be 300us or shorter.
5.4.3
STO status monitor (EDM)
The EDM signal which indicates state of STO inputs and
internal fault detection is a reference signal, non-safety
signal. This signal may not be used to activate another
safety function.
The length of the cabling connected to ED+ and ED-
terminals must be twenty (20) meters or shorter.
5.4.4
EMC
The system must only be used in the EMC environment that
it is designed for, or necessary mitigations must be applied.
SJ-P1 must only be used within the EMC environment
specified in IEC61800-5-2:2016, 2
5.4.5
Routing the cables
Cabling of input and output of the safety function must be
physically and appropriately separated from the other
signal cablings.
enclosure meeting the
nd
environment.
5-2
Planning Installation