Model Selection Guide

Mechanical Dimensions

Mechanical Notes:

Notes:

1. Output voltage tolerance includes set-up tolerance, line regulation and

load regulation. For the 12V output model, tolerance is ±2.0%.

2. Ripple & noise is measured using equipment with 20 Mhz of bandwidth.

Connection to the unit under test is made with a 12 inch length of “twisted

pair” wires terminated with a set of 1.0 μF & 4.7 μF capacitors connected

in parallel.

3. Overload protection is foldback current limiting. The unit recovers auto-

matically when the fault is removed.

4. Over voltage protection is a clamp type. The power to the unit must be

manually reset to recover.

5. Over temperature protection shuts down the output. The unit recovers

automatically when the temperature goes down. The thermal detector

is mounted on the heat sink of the power semiconductor.

6. Isolation resistance is given for Input/Output; Input/FG and Output/FG.

7. To mount the unit to the DIN rail, tilt the unit rearwards from the top,

fitting the mount over the top of the rail. Press back on the bottom front

of the unit until it locks in place on the rail. To remove the unit from the

rail, pull the removal clip at the bottom rear of the unit downward with

a screw driver. With the clip down, lift up on the unit from the bottom

front until it clears the rail. Before installation or removal all wiring should

be disconnected and the main power to the system shut off.

8. When wiring the supply, all lines should be as thick and short as possible.

AWG 14 wire is recommended for the DR-75 series.

9. The units should be mounted so they are vertically orientated. Air flow

(if it is provided) would optimally flow from the bottom to the top of

the unit.

10. It is recommended that a fuse be used on the input of a power supply

for protection. See the table above for the correct rating.

Model

Number

Rated

Power

(W)

Input

Output

Efficiency

(%, Typ)

Fuse Rating

Slow-Blow

(A)

Voltage

(VAC)

Current (A)

Voltage

(VDC)

Current (A)

Max)

Current (A)

Range

Range

115 VAC

230 VAC

DR-75-12

76

85 - 264

1.6

0.96

12

6.3

0 ~ 6.3

76

5.0

DR-75-24

76.8

85 - 264

1.6

0.96

24

3.2

0 ~ 3.2

80

5.0

DR-75-48

76.8

85 - 264

1.6

0.96

48

1.6

0 ~ 1.6

81

5.0

Pin

Function

1

Frame Ground (FG)

2

AC/Neutral (DC+)

3

AC/Live (DC-)

MicroPower Direct

www.micropowerdirect.com

232 Tosca Drive Stoughton, MA 02072

•

TEL: (781) 344-8226

•

FAX: (781) 344-8481

•

E-Mail: sales@micropowerdirect.com

Pin

Function

1,2

DC Output (+V)

3,4

DC Output (-V)