Rockwell Automation T8094 8000 Series TMR System Safety Manual - Manual (Page 73)

SAFETY MANUAL
D oc N umber T8094
I ssue 27 – June 2013
Page 52 of 103
the sufficient current be available to ensure their protective action and that
the protective device can break the maximum prospective fault current.
• Ensure that the power distribution media is sized to accommodate the
maximum prospective fault currents and tolerable voltage losses. This is
specifically important where floating supplies are employed and other power
sources may result in high prospective fault currents in the event of multiple
earth-fault conditions.
The system modules require two 24V dc power feeds, with a common return path, i.e.
the 24V return is common between the power feeds.
Where other than 8000 series power supplies are used, they shall conform to
IEC61131 Part 2, EN61010-1 or EN 60950.
3.14 ELECTROSTATIC HANDLING PRECAUTIONS
The following handling precautions shall be observed:
1. Personnel should earth themselves before handling modules.
2. Modules should not be handled by their connectors.
3. Do not remove modules from their packaging until required for use.