Emergency Stop Function - Hitachi SJ7002 Series Instruction Manual

Emergency Stop Function

Introduction
The SJ700 series inverter has the function of "uncontrolled stopping by removal of motor
power" in accordance with Stop Category 0 defined by EN60204-1. The inverter is also
designed to comply with Safety Category 3 of EN954-1. This function is generally called Safe
Stop function. The emergency stop function shuts off the inverter output (i.e. stops the switch-
ing operation of the main circuit elements) in response to a command from a hardware circuit
via an intelligent input terminal without the operation by internal CPU software.
Carefully note the following points when installing or using the Emergency Stop Function:
• The emergency stop function does not electrically shut off the inverter but merely stops the
• All systems that include an inverter must comply with the requirements of EN60204-1
• Before installing a system using Safe Stop function, you must fully examine whether Safe
• Every system must be configured with an inverter, a motor, and an external shutoff device.
• Safe Stop function is not intended for electrical insulation between the inverter and motor. If
• Safe Stop function is not designed to prevent malfunctions in drive process control and
• Carefully note that digital outputs (i.e., relay and open collector outputs) are not regarded as
Inverter
To enable the emergency stop function, set the slide lever of slide switch SW1 to ON. The
Configuration factory default SW1 setting is OFF (Emergency Stop disabled).
NOTE: Before operating slide switch SW1, make sure that the input power supply is off.
NOTE: Carefully note that improperly turning slide switch SW1 ON or OFF will automati-
cally change function assignments to the control terminals of the inverter.
switching operation of the main circuit elements. Therefore, do not touch any terminals of
the inverter or any power lines, e.g., motor cables. Otherwise, electric shock, injury, or
ground fault may result.
(safety of machinery) and other applicable standards. You must confirm the contents of
standards applicable to your system.
Stop function and the safety category to be applied are adequate for your system. For details,
refer to the standards required for your system.
The external shutoff device must at least comply with Safety Category 3 of EN954-1.
necessary, connect a shut off device (e.g., contactor) to the motor connection cable.
application functions.
the safety-related signals described here. The signals output from externally installed safety
relays must be used for the safety-related control circuits installed for your system.
Slide switch SW1
Slide lever (factory setting: OFF)
OFF
ON
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SJ700 Inverter
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