Rockwell Automation 1771-P4S_P6S_P4S1_P6S1 Power Supply Modules Installation Instructions - Manual (Page 5)

Publication 1771-IN079A-EN-P - June 2002
Allen-Bradley Power Supply Modules 5
Place the Power Supply in a Chassis
You can place these power-supply modules into any I/O module slot in any
current chassis (1771-A1B, -A2B, -A3B, -A3B1, -A4B, -PSC).
However, to place these power-supply modules into a superseded I/O
chassis (1771-A1, -A2, -A4), you must follow the restrictions in the
following table.
The power supply is a modular component of the 1771 I/O system,
requiring a properly installed system chassis. Refer to publication
1771-IN075 for detailed information on acceptable chassis and proper
installation and grounding requirements. Limit the adjacent slot power
dissipation to a maximum of 10W.
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Adapter or
in-chassis
processor
I/O Chassis 1st Power Supply
1
2nd Power Supply
1
Without an integral
power supply 1771-A4 I/O slot 0 I/O slot 10
1771-A2 I/O slot 0 I/O slot 4
1771-A1 I/O slot 0 not applicable
With an integral power
supply 1771-A4 not applicable I/O slot 8
1771-A2 not applicable I/O slot 3
1
I/O module slots are numbered 0 thru 15, left to right.