All specifications are at 25°C ambient, unless otherwise stated.
www.murata-ps.com/support
D1U3CS-W-850-12-HxxC.B02
Page 3 of 6
D1U3CS-W-850-12-HxxC Series
81mm 1U Front End AC-DC Power Supply Converter
OUTPUT CONNECTOR AND SIGNAL SPECIFICATION
DC and Signal Connector: FCI 51721-10002406AA
D1
D2
D3
D4
D5
D6
C1
C2
C3
C4
C5
C6
PB1
PB2
PB3
PB4
PB5
PB6
B1
B2
B3
B4
B5
B6
A1
A2
A3
A4
A5
A6
Pin Assignment
PB1, PB2, PB3
PB4, PB5, PB6
A1
A2
A3
A4
A5, B5, C5, D5
A6, B6, C6, D6
B1
B2
B3
B4
C1
C2
C3
C4
D1
D2
D3
D4
Signal Name
+12V GND
+12V OUT
PS_ON
+12VRS_RETURN
TEMP_OK
PS_SEATED
+VSB
+VSB GND
AC OK
+12VRS
+12V_ISHARE
PS_INHIBIT/PS_KILL
SDA
SCL
PWR_GD
FAN_FAIL
A0
A1
S_INT
NO CONNECTION
Description
Main output voltage, return
Main output voltage
Power supply “ON”
Main output remote sense, return
Temperature “OK” signal output
Power supply is plugged into the system
Standby output voltage
Standby output voltage, return
Input AC voltage “OK” signal output
Main output remote sense
Main output active load sharing bus
Floating pin will turn off the power supply (shorter pin, last-
make and first-break contact for hot plugging) . This signal
overrides PS_ON in disabling the main output.
I
2
C Data line
I
2
C Clock line
Power good
Fan failure
Address line least significant bit
Address line most significant bit
System interrupt
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
Press Fit
Straight
TBD
Right Angle
51761-10002406AA
www.murata-ps.com/support
D1U3CS-W-850-12-HxxC.B02
Page 4 of 6
D1U3CS-W-850-12-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 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.
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