Features and Benefits
■ 24 V DC supply voltage
■ Supply current ≤ 4 A
■ Bus access via terminals
■ Redundant supply
■ Fault signal output with adjustable
mode of operation
■ EMC acc. to NAMUR NE 21
Function
The power feed module supplies the Power Rail with a voltage of
24 VDC and a maximum current of 4 A.
Functionality
General
The power feed module supplies the Power Rail with a voltage of 24 V DC and a maximum current of 4 A.
The dual designed power feed terminals 8+ and 11+ or 9- and 12- have the ability to loop the supply (up to a
max. of 10 A). The integrated fault evaluation detects shorts and possible collective error messages. In a
fault condition, the relays switch closed (terminals 7 and 10) and the fault is indicated by means of a red
LED on the front panel. The mode of operation can be adjusted with a plug-in jumper. The terminals 13 and
15 are for the bus connection (only with Power Rail PR 900-N). The terminal 14 is the measuring point for
the collective error message (only planned for inspection or test, may not be wired into the system).
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