User`s manual

APPENDIX C – RESTART INTERLOCK CIRCUITS C-4
CDS7324 (FORMERLY LSF-0819)
Rev. A INSTALLATION & USER’S MANUAL
C.3 SAFETY REQUIREMENTS
• Complete Standstill. The Restart Interlock safety function prevents the motor unexpectedly starting from
standstill. This circuit can be used in the “Safe Standstill” machine function. When the motor is rotating, the
switching-on of the Restart Interlock provides an uncontrolled stop (category 0 according to EN 60204-
1:1997). When a controlled stop of category 1, according to EN 60204-1:1997, is requested, the condition of
stopped motor must be assured.
The final machine must be able to stop the motor.
• Environmental Conditions. Equipment intended to operate within the following environmental conditions:
◊ Ambient temperature: 0 to +40°C
◊ EMC immunity: according to EN 61800-3/A11:2000 (Adjustable speed electrical power drive systems. Part
3: EMC product standard including specific test methods). Second environment (industrial)
◊ Vibration immunity: 2 to 12Hz, 1.5 mm amplitude (peak); 12 to 200Hz, 1 g acceleration
◊ Shock immunity: 10 g, half sine, 11 ms, according to EN 60721-3-3:1995, Class 3M4
• Enclosure. Electronic Equipment intended for installation in an enclosure providing at least IP54 protection.
• Pollution Degree 2. The equipment shall be installed in a pollution degree 2 environment, where normally
only non-conductive pollution occurs. Occasionally, however, a temporary conductivity caused by
condensation is to be expected, when the electronic equipment is out of operation.
WARNING - The designer must evaluate the machine stopping time during the risk
assessment even in the case of failure. The machine can present a dangerous
overrun in case of failure of the drive. Other protective measures are needed to
achieve a safe condition.
WARNING - When the Restart Interlock Circuit is activated, the motor can no longer
generate a torque. Motors which are not automatically clamped when powered-
down (e.g. vertical/inclined axes), must be clamped using a mechanical brake