NTP-5521/5531/5561 SWITCHING MODE POWER SUPPLY
USER MANUAL
Keep this manual in a safe place for quick reference at all times.
This manual contains important safety and operation instructions for correct use of the power
supply. Read through the manual and pay special attention to the markings and labels of this
unit and equipment to be connected.
Pay special attention to these two types of notices used in this manual
WARNING:
Failure to observe this warning may cause injury to persons and damage to power
supply or connected equipment.
CAUTION:
Failure to observe this warning may result in damage to equipment
and Improper functioning of the power supply.
WARNING:
1. Do not use this power supply near water.
2. Do not operate or touch this power supply with wet hands.
3. Do not open the casing of the power supply when it is connected to ac mains.
4. Refer all servicing to qualified service personnel only.
5. Before replacing the AC fuse at AC socket, find out and clear up the cause first.
6. Replace the AC fuse with the same type and rating as the original fuse.
7. The max. output voltage of Model NTP-5561 is 60VDC, avoid touch the metal contact part of the
output terminals.
CAUTION:
1. Use a grounded 3 pin AC source.
2. This unit is for indoor use only.
3. Do not operate or place this unit in a humid, dusty, in direct sunlight location or near any heat source.
4. Before plugging into local AC mains, check with the rating label at the back of the unit.
5. Do not block any ventilation openings of the unit.
6. This unit must be used within the specified rating, regular excessive continuous loading may cause
damage to the power supply.
7. The gauge size of input power cable must be at least 0.75mm
2
and the total length of power cable
must not exceed 3m.
OPERATION ENVIRONMENTAL CONDITION
•
10-80% R.H.
•
Maximum relative humidity 80% for temperature up to 31°C decreasing linearly to 50% relative humidity at
40°C.
•
Altitude up to 2000m
•
Installation category: CAT 2
•
Pollution degree: 2
•
Mains supply voltage fluctuation up to ±10% of the normal voltage
