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Instruction Manual
1.
Safety Instructions
•
Must select correct AC input voltage range through selectable switch before turning on (Refer to
Fig. 1, ⑥).
•
To ensure sufficient convection cooling, always maintain a safety distance of ≥ 20mm from all
ventilated surfaces while the device is in operation.
•
For safety reasons, please ensure the mounted device is kept at ≥ 7mm safety distance at the top
and left side from other components and equipments (Refer to Fig. 2).
•
The device is not recommended to be placed on low thermal conductive surface, for example,
plastics.
•
Note that the enclosure of the device can become very hot depending on the ambient temperature
and load of the power supply. Do not touch the device while it is in operation or immediately after
power is turned OFF. Risk of burning!
•
Do not touch the terminals while power is being supplied. Risk of electric shock.
•
Prevent any foreign metal, particles or conductors to enter the device through the openings during
installation. It can cause: Electric shock; Safety Hazard; Fire; Product failure
•
Battery need to be protected from short circuit while installation & servicing. Danger of explosion.
•
Signal cable should not interact with AC Input.
•
Warning: When connecting the device, secure Earth connection before connecting L and N. When
disconnecting the device, remove L and N connections before removing the Earth connection.
2.
Device Descriptions
Refer to Fig. 1.:
䐟 Input & Output terminal block connector
䐠 DC voltage adjustment potentiometer (24V - 28V)
䐡 Green LED ON = DC OK (Normal operation through mains supply or through battery when
operating in buffering mode)
մ Red LED ON = Battery reverse polarity
յ Battery charging current adjustment potentiometer (Factory Setting: 1A)
Max charging current shall not exceed 1.2A (Refer to Fig. 1, ⑤).
ն AC selectable switch
䷻ Signal connector - JST: XHP-4 (for PMU-27V155WLCA only)
3.
Installation of the Device
Refer to Fig. 3.:
䑵 Mounting holes for the power supply assembly onto the mounting surface. The power supply shall
be mounted on minimum 2 mounting holes using M3 screw minimum 5mm length.
䑶 This surface belongs to customer's end system or panel where the device is mounted.
䑷 Connector
•
Use flexible cable (stranded or solid), AWG No. 16-14.
•
The torque at the Connector shall not exceed 13 Kgf.cm. The insulation stripping length should not
exceed 0.275" or 7mm (Refer to Fig. 4).
4.
Battery Information
Battery Capacity
Battery Cut-off Voltage
Battery Low (Deep Discharge) Detection*
*If the battery is deep discharged, the power supply will not recognize the battery.
5.
Installation of Mounting Accessories
Refer to Fig. 5.:
•
Only use M3 screw ≤ 2.5mm through the base mounting holes. This is to keep a safety distance
between the screw and internal components.
•
Recommended mounting tightening torque: 4~8 Kgf.cm.
REV.00
3.2AH - 15AH
20V ± 1V
17V ± 1V
Side surface
5
6
3
Base surface
1
2
7
Signal connector - JST: XHP-4
(for PMU-27V155WLCA only)
Pin No.
Description
400mm.(Ref.)
1
DC OK
2
Low Battery
3
GND
4
AC OK
Fig. 1. Device Descriptions
Side Mounting (Vertical)
Base Mounting (Vertical)
A
A
A
A
A
A
C
C
C
C
C
C
B
B
B
Fig. 3. Mounting Orientation
7 mm
Lug
Stripped wire
Fig. 4. Wire Type
PMU-27V155WL□A
TOP SIDE
TOP
PSU
LEFT SIDE
4
7
PSU
LEFT
Fig. 2. Assembly Reference
Side Mounting (Horizontal)
A
A
B
B
A
B
B
B
B
Mounting
Chassis of
accessories
the device
Mounting
screw
2.5mm
max.
Fig. 5. Mounting Screw
www.DeltaPSU.com
CN1
CN1
C
C
C
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