Indel GIN-SAC4 Series, Руководство пользователя по оборудованию, Страница: 33 / 94

SAC4xX User Manual
01.04.2020 Rev 1.42en 33
6. Safety functions with the SAC4
The contents of this manual applies only to the devices listed in chapter 6.3.
The following information are especially not valid for SAC4 Devices with option “FS”!
6.1. Safe Torque Off (STO)
The STO safety function shifts all to the drive connected motors into a de-energized state. As a result, the
motors are torque-free and thus force-free. Since the drive can no longer initiate a torque or force, no
dangerous movement can occur.
The STO function is technically implemented with two safe pulse inhibitors. The figure below illustrates
the functional principle of the safety pulse inhibitors.
The two pulse inhibitors act independent by using its own relay each. The first pulse inhibitor can sup-
press the control signals of all the high side IGBTs of the power stages while the other pulse inhibitors can
suppress the control signals of all low side IGBTs.
All contacts of each relay are forcibly guided contacts. The auxiliary contacts reflect the state of the main
contacts and can be used as feedback channels.
The correct state of the relays must be checked by the user by monitoring the diagnose Path (Pin K1 to
K2). If any impermissible state is detected, there must be a defect and the machine must be shut down.
For diagnostic purposes and debugging, the state of the relays are also displayed on (not reliable) varia-
bles inside the system software.
For the terminals B1 B1' and B2 B2', external wire jumpers must be installed. These wire jumpers are a
safety feature and they prevent the unnoticed operation of SAC4 drives with enhanced Safety option “FS”
in case of a mix-up.
6.2. Connection example
A non-binding connection example can be found in the commissioning manual in chapter 4.
Commissioning Manual
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