
Instruction Manual
1. Safety Instructions
•If user’s mounting orientation is not according to the recommended mounting orientations,
please consult Delta for further information.
•To ensure sufficient convection cooling, always maintain a safety distance of ≥ 50 mm (1.97
inch) from allventilated surfaces while the device is in operation.
•The device is notrecommended to be placed on low thermal conductive surface.
For example, plastics.
•For safety reason, please ensure the mounted device is kept at 8≥ mm safety distance for
D1 fromother components and equipment (Refer to Fig. 2.)
•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 isin operation or
immediately after power isturned OFF. Risk ofburning!
•Do not touch the terminals while power isbeing supplied. Risk of electric shock.
•Prevent any foreign metal, particles orconductors from entering the device through the
openings during installation. Itmay cause: Electric shock; Safety Hazard; Fire; Product
failure
•The power supply must be mounted by metal screws ontoa grounded metal surface. Itis
highly recommended that the Earth terminal on the connector be connected to the
grounded surface.
2. Device Descriptions
Refer to Fig. 1.:
1 Input & Output terminal block connector
2 DC voltage adjustment potentiometer
3 DC OK control LED (Green)
3. Installation of the Device
A Base Mounting: Fig. 3 show the mounting hole locations for power supply assembly
onto a metal mounting surface. Fig. 5, only use M4 screw ≤ 3 mm (0.20 inch) through
the base mounting holes. This is to keep a safe distance between the screw and
internal components.
B Fig. 3: Connector
C Fig. 3: This surface belongs to customer’s end system or panel where the device is
mounted.
•Use flexible cable (stranded or solid) of AWG 18-12. User should calculate and select the
suitable wire specification (type/quantity/diameter) according to actual output current. The
torque at the Connector shall not exceed 8 Kgf.cm. (6.94 lbf.in). The insulation stripping
length should not exceed 0.275” or 7 mm. (Refer to Fig. 4).
•Recommended mounting tightening torque: 4~7 Kgf.cm (3.47~6.08 lbf.in).
Fig. 1. Device Descriptions
PMR-☐V320W1AT (Terminal Block)
Base Mounting (Horizontal)
Fig. 5. Assembly Reference
Fig. 3. Recommended Mounting Orientations & Mounting Hole Locations
Fig. 2. Assembly Reference