D1U3CS-W-850-12-HxxC Series

81mm 1U Front End AC-DC Power Supply Converter

D1U3CS-W-850-12-HxxC.A03 Page 5 of 6

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WIRING DIAGRAM FOR OUTPUT

CURRENT SHARING NOTES

12V Output: Current sharing is achieved using the active current share method. (See wiring diagram for connection details.)

Current sharing can be achieved with or without remote sense connected to the common load.

+VSB outputs can be tied together for redundancy but total combined output power must not exceed 20W. The +VSB output has internal ORing MOSFET for addi-

tional redundancy / internal short protection.

The current share pin B3 is a connection between the two units. It is input and/or output as the voltage on the line controls the current share. A power supply will

respond to a change in this voltage but a power supply can also change the voltage depending on the load drawn from it. On a single unit this would read 8V at

100% load. For two units sharing load then this should read 4V for perfect current sharing.

Up to 4 units can be paralleled together. Please consult your Murata sales representative if operation with more than 4 units in parallel is needed.

+12V GND

+12VRS (Main Output Remote Sense)

+12VRS_RETURN

+12V OUT

B2

PB4-6

PB1-3

A2

Dotted lines show optional remote sense connections.

Optional remote sense lines can be attached to a load that is a distance

away from the power supply to improve regulation at the load.

D1U3CS

12V load

A1

A6,B6,C6,D6

A5,B5,C5,D5

FET, BJT, wire

or switch (debounced )

to turn on +12V main output

+VSB load

+VSB

PS_ON_L

+VSB GND

B4

PS_INHIBIT/PS_KILL

D1U3CS

B3

+12V_ISHARE

PS_INHIBIT/PS_KILL

B4

A6,B6,C6,D6

+VSB GND

PS_ON_L

A1

A5,B5,C5,D5

+VSB

B3

A2

+12VRS_RETURN

+12V_ISHARE

+12V GND

+12V OUT

+12VRS (Main Output Remote Sense)

B2

PB4-6

PB1-3