Hitachi WJ200 Series Quick Reference Manual page 91

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Functional Safety (Certification in Progress)
Introduction
The Gate Suppress function can be utilized to perform a safe stop according to the
EN60204-1, stop category 0 (Uncontrolled stop by power removal). It is designed to meet
the requirements of the ISO13849-1, PL=d only in a system in which EDM signal is
monitored by an "external device monitor".
Stop Category defined in EN60204-1
Category 0 : Uncontrolled stop by immediate (< 200 ms) shut-down of the power supply to
Category 1 : Controlled stop by interrupting the power supply to the actuator level if, for
Category 2 : Controlled stop. The power supply to the drive element is not interrupted.
How it works
Interrupting the current to GS1 or GS2, for
example removing the link between either GS1
or GS2 and PLC or both GS1/GS2 and PLC
disables the drive output, i.e. the power supply
to the motor is cut by stopping the switching of
the output transistors in a safe way. EDM output
is activated when GS1 and GS2 are given to the
drive.
Always use both inputs to disable the drive. If for
any reason only one channel is opened, the
drive output is stopped but the EDM output is
not activated. In this case the Safe Disable input
wiring must be checked.
Activation
Turning on the safety switch automatically
assign the GS1 input and GS2 input
automatically.
To assign EDM (external device monitor) output,
please turn the EDM function switch on. EDM
output is automatically assigned on intelligent
output terminal 11.
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the actuators
example, the hazardous movement has been brought to a standstill
(time-delayed shut-down of the power supply).
Additional measures to EN 1037 (protection from unexpected restart) are
necessary.
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Email: charles@automatedpt.com
Email: charles@automatedpt.com