Triton Go Product Manual |
Wiring and Connections
INGENIA | 05/29/2017
112
7.8 Safe Torque Off (STO)
Triton Go Servo Drive includes a Safe Torque Off (STO) connector.
The STO is a safety system that prevents
motor torque in an emergency event
while Triton Go remains connected to the power supply. When STO is
activated, the power stage is disabled automatically (no mater what control or firmware does), and the motor
shaft will slow down until it stops under its own inertia and frictional forces.
The Triton Go STO works with negative logic, deactivating the power stage by default.
In order to activate the
power stage
, and therefore allow the motor operation,
two differential inputs must energized
. These inputs
activate two optocouplers connected in series that enable the Triton Go power stage operation. On the
contrary,
if the STO inputs are not energized, the transistors of the power stage are turned off
and a STO
fault is notified. During this state, no torque will be applied to the motor no matter configuration, or state of a
command source. This will slow down the motor shaft until it stops under its own inertia and frictional
forces. This input should not be confused with a digital input configured as enable input, because enable input
is firmware controlled and does not guarantee intrinsic safety as it can be reconfigured by a user.
