Input. Internal 10K ohm pull-up (accepts open collector/drain
drive). This signal to be pulled low to turn-on power supply.
Main output remote sense return
A TTL logic HIGH when operating temperature within allowable
range
Power supply is plugged into the system. Internally tied to
ground.
Standby output voltage
Standby output voltage return
Input AC voltage “OK” signal output
Main output remote sense
Main output active load sharing bus
This signal is connected to a short pin on the PSU. When left
open operation will be inhibited. When the PSU is inserted into
the system, this pin must be pulled low by the system and will
turn on the PSU only after all inputs have seated.
I
2
C Data line
I
2
C Clock line
Power good. Active TTL HIGH when output is within regulation
limits
Fan failure
Address line least significant bit
Address line most significant bit
System interrupt
Standby output remote sense
Amps per pin
30
30
N/A
N/A
N/A
N/A
2.0
2.0
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
N/A
MATING CONNECTORS
Mating Connector
FCI
TBD
Press Fit
Straight
Right Angle
51761-10002406AA
www.murata-ps.com/support
D1U3CS-W-1200-12-HxxC.B02
Page 4 of 6
D1U3CS-W-1200-12-HxxC Series
81mm 1U Front End AC-DC Power Supply Converter
WIRING DIAGRAM FOR OUTPUT
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.
+12VRS (Main Output Remote Sense)
B2
PB4-6
+12V OUT
12V load
PB1-3
A2
B3
+12V GND
+12VRS_RETURN
+12V_ISHARE
+12V GND
+12VRS_RETURN
+12V_ISHARE
PB1-3
A2
B3
+12VRS (Main Output Remote Sense)
+12V OUT
PB4-6
B2
D1U3CS
D1U3CS
A5,B5,C5,D5
A1
+VSB
PS_ON_L
+VSB load
FET, BJT, wire
or switch (debounced )
to turn on +12V main output
+VSB
PS_ON_L
A5,B5,C5,D5
A1
A6,B6,C6,D6
+VSB GND
+VSB GND A6,B6,C6,D6
B4
PS_INHIBIT/PS_KILL
PS_INHIBIT/PS_KILL
B4
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 additional 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 8 units can be paralleled together. Please consult your Murata sales representative if operation with more than 8 units in parallel is needed.
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