Wiring Example - Hitachi SJ Series Safety Function Manual

Chapter 6
Chapter 6 Installation
6.1 Contents in this chapter
This chapter describes the items to be taken into
consideration for installation.
6.2 Installation
The product must be installed as following the instructions
provided in the Safety Function Guide and the User's Guide
of SJ-P1 and this documentation.
In case of using any optional devices such as a fieldbus
module, please read through the manuals of each optional
device before working on the product.
Operation sequence of wiring example
1. When the safety switch is pressed, Safety function
signals are delivered to P1-FS and the Safety function is
activated.
2. Even after the safety switch has been released, the safety
inputs to the P1-FS are held by the safety unit.
3. After the operator of the system has confirmed the
safety of human and the system, and then presses the
reset switch, S1-1 and S1-2 inputs to P1-FS are released
and Safety function is released.

6.3 Wiring example

The figure below is a wiring example under the following
conditions.
 Use of an external power supply for safety signal
inputs
 Reset/Release of safety signal inputs to P1-FS are
controlled using the reset function of a safety unit
6-1
Installation
6