ST–III Series Power Supplies
USER INSTRUCTIONS
Specification
Input Voltage:
ST20-II & ST35-II: 230 – 240Vac nominal, ±10%, 50/60Hz.
The power supply will withstand a 5 minute, +15% surge on the
maximum nominal voltage
Input Surge:
< 40A (cold start)
Hold-up Time:
> 10mS at full load current and over nominal input voltage operating
range
Output Current:
ST20-II: 20A Continuous (load + battery current)
ST35-II: 35A Continuous (load + battery current)
Factory Set Voltage
13.65V +/- 0.1V (Vfloat)
Load Regulation:
< 2%
Output Ripple
Voltage:
< 150mV
Over Voltage
Protection:
< 17V
Over Current
Protection
ST20-II: 20A to 25A (load + battery current)
ST35-II: 35A to 38A (load + battery current)
Battery Current Limit
10A ± 1A (ST20-II)
15A ± 1A (ST35-II)
Battery
Connect/Disconnect
Connect: 10.50 ± 0.2V (Input Mains not present) and first power up
Connect: 11.70 ± 0.2V (Input Mains not present and not first power up)
Connect: 11.50 ± 0.2V (Input Mains present)
Disconnect: 10.0 ± 0.2V
Battery Trickle
Charge
0.8A
Battery Drain
< 2mA.
Efficiency:
> 84%
Cooling Fan
Operation ST35-II
Only.
Cooling fan on temperature of Transformer: 95C + 3 degrees.
Cooling fan off temperature of Transformer: 75C + 3 degrees.
Ambient
0
O
C – 50
O
C
Weight:
< 2kg
Standards
Safety: AS/NZS 60335-1, AS/NZS 60335-2-29 & AS/NZS 61558
EMC CISPR 22 class A
Compliance:
ERAC+ACMA (RCM)
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