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

10 MSC II (Moog Servo Controller) Digital I/Os
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.
The power supply for the digital I/Os of the MSC II control module is independent
of the power supply for the MSC II control module's internal electronics
(L1+/M1) and is established over the terminals L2+ and M2.
Power supply characteristics
�-"6.2.1-Power Supply Characteristics" on page 39
Connecting sensors to the power supply:
�-"6.2.4-Connecting Sensors" on page 43
Connecting the power supply for the internal electronics:
�-"6.2.3-Connecting the Power Supply" on page 40
© Moog GmbH User Manual M3000 ® and MSC II (CA65865-001; Version 1.1, 08/08) 94