WILLETT 430 - PSU Board; General Specification; Output Specification

Technical Description: PSU Board
Issue 2
77
Part No. 306-0430-102
PSU Board
General Specification
The PSU (Figure 22 (
1
)) is a switch mode power supply with the following general specification:
Input voltage 88 VAC to 260 VAC.
Input frequency 47 Hz to 63 Hz.
Inrush current (cold) 15 A at 115 VAC, 30 A at 230 VAC.
Operating temperature 0 to 50 °C.
Storage temperature -20 to 85 °C.
Cooling Free air convection.
Efficiency 80% typical.
Holdup time 20 ms.
Overvoltage type crowbar, trip point 5.9 V to 7 V.
Overload protection Foldback.
Switching frequency >30 Kilohertz (kHz).
Designed to comply with UL478, 1012, CSA22.2, VDE0806.
EMI Meets FCC class “B”.
Table 36 PSU Board General Specification
Output Specification
Load (A)Output Voltage
(V)
Min Rated Max
Tolerance
(+/- %)
Ripple Noise
(mV)
Line Reg
(%_
Load Reg
(%)
+5 0.5 4 8 1 50 1 1
+15 0 0.5 1 10 100 2 8
-15 0 0.5 1 10 100 2 8
+24 V 0.1 2 2.5 5 150 1 5
Table 37 PSU Board Output Specifications
Notes: Each output can provide up to a maximum load, but total load cannot exceed 85 W
continuously.
+5 V output is adjusted to +/- 1% at 60% rated load at factory.
Tolerance is measured with all outputs at 60% rated load.
Line regulation is measured from low line to high line at rated load.
Load regulation is measured by +/- 40% load change from 60% rated load, and all other outputs
is kept at 60% rated load.
Ripple and noise is measured by using a 12" twisted wire terminated with a 47µF capacitor.
Efficiency is measured at rated load.
All parameters except line regulation are specified at 115/230 VAC input, rated load, 25°C
ambient.