How It Works - Hitachi WJ200 Series Instruction Manual

E−2
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". (Otherwise PL of drive downgraded to
PL=c.)

How it works

Removing the currents from both terminals GS1 and GS2 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.
Installation
When the Gate Suppress function is utilized, connect the drive to a safety certified
interrupting device utilizing EDM output signal to reconfirm both safety inputs GS1
and GS2. Follow the wiring instructions in the user manual chapter 3.
Safety Safety
Iｎput Iｎput
Safety
Output
Manual
Reset
T31 T33
EDM
（Feedback)
input
G9SX-AD G9SX-AD
PWR PWR FB FB
T1 T1
T2 T2
EI EI
ED ED
ERR ERR
Safety
Unit
(certificated
acc. to EN954-1
S14 S24
and ISO13849-1)
Safety Related Part
KM1
CM2
Inverter
EDM
with
Safety stop
GS1
function
GS2
M