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MC4U Control Module
3.2
Hardware Guide
General Safety Guidelines
Under emergency situations the MC4U must be completely disconnected from any power
supply. The E-Stop Inputs and Left/Right Limits of the MC4U are designed for use in
conjunction with customer-installed devices to protect driver load. The operator is responsible
for complying with all Electrical Codes.
3.2.1
MC4U Handling & Maintenance
Warning
It is absolutely forbidden to touch the MC4U unit or component
whenever power is being applied for maintenance purposes.
Whenever any MC4U maintenance has to be performed, all cables and
input power to the unit have to been disconnected. A period of 30
minutes to allow complete voltage discharge must be strictly adhered
to before removing the MC4U or disassembling any of its
components.
3.2.2
Emergency Stop Device
Warning
An emergency stop device must be located at each operator control
station and other operating stations where an emergency stop may be
required. The emergency stop device must be able to disconnect any
electrical equipment connected to the unit from the power supply. It
will not be possible to restore the circuit until the operator manually
resets the emergency stop. In situations with multiple emergency
stop devices the circuit shall not be restored until all emergency
stops devices have been manually reset.
3.2.3
Fail Safe Logic Recommendation
ACS Motion Control recommends connecting all safety inputs (limit inputs and emergency
stop input) with a fail safe logic whenever the normal operation the inputs are active.
Note
When an unsafe event happens, the input becomes zero and the controller
identifies this as a fault.
Version 6.50
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Safety and EMC Guidelines