User Manual M3000® Automation System / MSC II (Moog Servo ...

6 Project Planning and Installation Power Supply
6.2.3.3 Maximum Admissible Current
All of the power supply terminals of M3000 ® modules and the associated internal
connections are designed for a maximum current of 12 A.
If the current is greater than the maximum current, the following must be employed:
• Several separately fused circuits or
• Several separate power supplies in separated circuits
6.2.4 Connecting Sensors
WARNING The internal electronics of M3000 ® modules and attached
sensors must be supplied with power from a permanently
connected (unswitched) power supply that
cannot be individually switched off, without switching
off the module's power supply.
If a switched power supply is used, such as when there are
intermediate switching devices (emergency stops, manual
operators, etc.), the following problems might arise, depending
on the state of the power supply for the internal electronics
of the module and sensors (�-table-3 on page 41):
• Reverse energization from sensor to module
• Invalid sensor data
WARNING Sensors that are connected to digital inputs of M3000 ®
modules with several I/O groups, such as MSC I, QDIO,
or RDIO, must under all conditions be supplied from the
same power supply as the corresponding I/O-group to
which the sensor is connected!
Otherwise, if the power supply for the internal electronics of
the module is switched off, there might be reverse energization
from the sensor to the module.
There is a danger of:
• Uncontrolled movements
• Fault or failure of a manual control
• Permanent damage to the module
• Malfunctions
Digital I/Os of MSC II and MSD Motion Controller are protected
against reverse energization.
Maximum Admissible
Current for
M3000 ® Modules
Connecting Sensors:
Safety Instructions
© Moog GmbH User Manual M3000 ® and MSC II (CA65865-001; Version 1.1, 08/08) 43