飞普天科技销售ASTEC开关电源，型号：LPS255-CF，
输出参数：
- Overvoltage protection: 5 V output: 5.7 to 6.7 VDC. Other models 10% to 25
- Overload protection: Short circuit protection on all outputs. Case over
- Hold-up time: 20 ms @ 250 W load, 115 VAC minal line at factor
- Supervisory output: 5 V @ 100 mA regulated; 12V @ 500 mA
- Adjustment range: 2:1 wide ratio
- Maximum power: With cover: 250 W with 30 CFM forced air. (-C) (-C
逻辑控制明细：
- Remote sense: Compensates for 0.5 V lead drop min. Will operate
- Remote on/off: Requires an external contact (N.O or N.C) to inhib
- DC OK: TTL logic goes high 50-150 msec after the output.
- Power failure: TTL logic signal goes high 50-150 msec after 5 V o
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