Hitachi SJ Series Safety Function Manual page 57

Chapter 5
Chapter 5 Planning Installation
5.1 Contents in this chapter
This chapter describes the items which must be taken into
consideration for planning installation SJ-P1.
5.2 Requirement for designer and
installer (installation supervisor)
Designers and installers (installation supervisor) who
design and install safety-related system must have been
trained to have the specialist knowledge of the essential
principles for designing and installing safety-related
systems.
Designers and those who maintenance safety-related
system must have been trained to understand the cause
and consequences of the common cause failure (CCF)
5.3 Installation environment
The product must be installed in a place where
environmental condition such as temperature, humidity,
corrosive gas, dust, vibration, is within the specification of
the product without external environmental controls.
Please refer to the User's Guide of SJ-P1 for the
requirements and specification for installation as well as
the environmental specification provided in chapter 11 in
this documentation.
The P1-FS with the SJ-P1 must be installed in an enclosure
(cabinet) having a protection rating of IP54 or higher for
protection against conductive dust and contamination.
5.4 Electrical installation
5.4.1
General Requirement
Please follow the instruction provided in the User's Guide
of SJ-P1 for electrical installation. If there is any conflict or
different description in the User's Guide of SJ-P1 and this
documentation, the description in this documentation
shall be considered to have priority.
All of the cables and signal lines must be protected, routed
and fixed appropriately.
5.4.2
Safety input
The two Safety inputs must be appropriately separated and
protected from each other to avoid mutual interference.
(E.g. separated cables, protection, double-shield cable)
The length of the cablings connected to terminals on P1-FS
must be twenty (20) meters or shorter.
Please refer to the wiring examples in Chapter 4 for wirings
on terminals.
5-1
Planning Installation
5