2
RTW 300W 042111
TABLE 2. POWER SUPPLY RATINGS AND SPECIFICATIONS
SPECIFICATION
DESCRIPTION
Input Voltage
Nominal:
Range:
100 to 120V a-c, 200 to 240V a-c
85-265V a-c
0 to 100% load, -10 to 71°C. Output power derated to 90%
of max. for input voltage between 85 and 90V a-c when
mounting positions B or C are used (see Figure 3).
CAUTION: Operation with input voltage outside specified
range may damage unit.
110-370V d-c
Polarity insensitive. (0 to 100% load, -10 to 71°C, derated
per Figure 2.) Safety ratings apply for a-c input operation
only.
Input Source Frequency Nominal:
Range:
50-to 60 Hz
47-440 Hz.
Units operate up to 440 Hz, however the leakage current
exceeds the UL leakage safety specification limit, and
power factor and efficiency specifications may not be met.
Input Current: (Maximum Load At
25°C with Nominal Output Voltage)
4A rms max.
(3.6A rms max for the 3.3V model,
6A rms typ. for 24V model)
100 - 120V a-c
2A rms max.
(1.8A rms max for the 3.3V model,
3A rms typ. for 24V model)
200 - 240V a-c
Input Protection
A limiting resistor in series with a resistor fuse (in parallel with a thyristor circuit) reduces start-
up surge. Units are protected against shorts by an input fuse. Fuse value 10.0A at 250 Volts
(Littelfuse P/N 0215010.MXF4P, Kepco P/N 541-0144).
Input Surge cold start,
interval > 30 Sec
(1)
15A typ., 20A max. first surge
100 - 120V ac
30A typ., 40 max. first surge
200- 240 V ac
Leakage Current:
0.3mA typ., 0.5mA max.
100V a-c, 60Hz (per Den-An)
0.4mA typ., 0.7mA max.
240V a-c, 60Hz (per IEC 950 and UL1950)
Power Factor
0.99 typical
100V a-c
0.93 typical
240V a-c
Stabilization
Typical
Maximum
Source Effect (min - max) (85 to
132 V a-c, 170 to 265V a-c)
0.1% 0.2%
Load Effect, measured at sensing
terminals (0%-100% load change)
0.2% 0.4%
Temperature Effect (–10° to 71°C)
0.5%
1.0%
Combined Effect (Source, Load
and Temperature)
±0.9%
±1.8%
Drift (from 1/2 to 8 hours at 25°C)
0.2%
0.5%
Remote Error Sensing:
Compensation up to 0.4 Volts per load wire (0.15 Volts for 3.3V model, 0.25 Volts for 5V
model) (see Figure 7). Transient recovery specs may not be satisfied if remote sensing used.
Transient Recovery
characteristic
excursion
±4% maximum
50% to 100% rated output
current;
transient time >50
µ
Sec
recovery time
1 mS maximum
Start-up Time
220 mSec typical,
350 mSec maximum
100V a-c
120 mSec typical,
200 mSec maximum.
240V a-c
(1) First surge only, not including current flow into EMI filter
