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All parameters are specified at 24V, 40A output current, 26°C ambient and after a 5 minutes run-in time, unless noted otherwise.
4 Rockwell Automation Publication 1606-RM010A-EN-P — February 2014
Bulletin 1606 Switched Mode Power Supplies
3. Input and Output Characteristics
Number of inputs - 2
Number of outputs - 1
Input voltage nom. DC 12-28V ±30% The input circuitry must meet the SELV requirements
stipulated by IEC/EN/UL 60950-1.
Input voltage range - 8.4-36.4Vdc
Voltage drop, input to output typ. 140mV at 2x20A, see Fig. 3-1
typ. 72mV at 2x10A, see Fig. 3-1
typ. 112mV at 1x20A, see Fig. 3-2
Input current nom. 2x 0-20A continuous
nom. 2x 20-32.5A for 5 seconds
max 2x 32.5A at continuous overload or short circuit
Peak input current max. 1000A for max. 1ms per input
Output current nom. 40A continuous
nom. 40-65A for 5 seconds
max.
65A at continuous overload or short circuit
Reverse current max. 1mA at 24V, per input, -40°C to +70°C
Reverse voltage max. 40Vdc voltage applied to the output, continuously allowed
Output capacitance typ. 320μF
Note: Ensure that the continuous output current does not exceed 65A. Check the short-circuit current of the power sources and if the
power source can deliver more than 65A together, use an appropriate fuse on the output.
Fig. 3-1 Input to output voltage drop when both inputs draw current
(typical 1+1 redundant case, when the output voltages of the two units are equal)
Voltage Drop, typ
0mV
10A 30A
20mV
40mV
60mV
80mV
100mV
120mV
40A20A
Output:
A
.
.
.
2
5
°
C
B
.
.
.
6
0
°
C
2x10A2x5A
Input / Output Current
Input:
2x20A2x15A
0
0
140mV
160mV
AB
V
A
24V,20A
+
-
24V,20A
+
-
V
A
I
1
I
2
U
1
U
2
I
1
I
2
=
U
2
U
1
= Voltage Drop
U
1
=
U
OUT
-
Output
A
V
I
OUT
U
OUT
Variable
Load,
0-40A
Input 1
Input 2
Output
Fig. 3-2 Input to output voltage drop when only one input draws current
Voltage Drop, typ.
0mV
5A 15A
20mV
40mV
60mV
80mV
100mV
120mV
20A10A
A
.
.
.
2
5
°
C
B
.
.
.
6
0
°
C
Output Current
0
140mV
160mV
AB
Voltage Drop
U
1
=
U
OUT
-
Not used or
power supply
with lower
voltage
V
A
24V,20A
+
-
I
1
U
1
Output
A
V
I
OUT
U
OUT
Variable
Load,
0-20A
Input 1
Input 2
Output
XLSRED40
XLSRED40