Rockwell Automation Publication 750-UM003D-EN-P - March 2017 11
Safety Concepts Chapter 1
ATEX System
The overall system includes an ATEX certified motor that is installed in a
potentially explosive atmosphere. The motor is equipped with a thermal sensor
that is connected to the ATEX option input. Do not install the drive in a
potentially explosive atmosphere. See Figure 1
.
Figure 1 - Basic ATEX Application
The ATEX option module monitors the thermal sensor in the motor. When
the thermal sensor reaches its trip point, the drive initiates a Safe Torque Off
function and removes torque-producing power from the motor. The ATEX
safety function has a safety integration level (SIL) capability limit of 1
according to IEC 61508.
ATEX Function
The PowerFlex 750-Series ATEX option module can be configured to support
ATEX certified motors that are equipped with either a thermostat or a PTC-
type thermal sensor.
WARNING: Risk of Explosion.
Do not install the PowerFlex 750-Series drive or PowerFlex 755T drive products
in a potentially explosive atmosphere.
A drive that is installed in a potentially explosive atmosphere can cause an
explosion.
PowerFlex 750-Series Drive or PowerFlex 755T drive products (750-Series drive shown)
Power to the Motor
Thermal Sensor Input to the Drive
Potentially Explosive Atmosphere
ATEX Certified Motor
ATTENTION: Risk of electric shock. If a motor insulation fault occurs, high
voltage can be present at the ATEX terminal block and wiring. Be sure that all
drive covers are installed when power is applied to the drive.
To Next Page
Loading...
Need help?
General
