ML60.121

MiniLine-2

Power supplies of the exact same type can be connected in series for higher

output voltages. It is possible to connect as many units in series as needed,

providing the sum of the output voltage does not exceed 150Vdc. Voltages

with a potential above 60Vdc are not SELV any more and can be dangerous.

Such voltages must be installed with a protection against touching. Earthing of

the output is required when the sum of the output voltage is above 60Vdc.

Avoid return voltage (e.g. from a decelerating motor or battery) which is

applied to the output terminals. Keep an installation clearance of 15mm (left /

right) between two power supplies and avoid installing the power supplies on

top of each other. Do not use power supplies in series in mounting

orientations other than the standard mounting orientation (input terminals on the bottom and output terminals on

top of the unit). Be ware that leakage current, EMI, inrush current and harmonics will increase when using multiple

power supplies series.

Earth

Unit A

AC

DC

Unit B

AC

DC

-

+

-

+

Load

+

-

Fuse

L2

L1

L3

L

N

PE

Power Supply

AC

DC

internal

fuse

The power supply can also be used on two-phases of a three-phase-system.

A phase-to-phase connection is allowed as long as the supplying voltage is

N input is not internally protected and is in this case connected to a hot

wire. Appropriate fuses or circuit breakers are specified in section 22.4

“External Input Protection”.

From a safety standpoint, the unit is internally designed according to the requirements for Protection Class 1 and 2.

Please contact PULS if you do not plan to use the PE terminal. A different marking of the front foil is then required.

Grounding of the input is beneficial for a high EMI immunity: Symmetrical spikes or fast transients on the input side

can be conducted directly to earth by the built-in filter capacitors. The magnitude of such spikes or fast transients on

the output side caused by the input is much smaller compared to not connecting this terminal to ground.

Fig. 22-5 Earthed input

Fig. 22-6 Not earthed input

21/23

Surge

Y

X

L

N

Ground

Power Supply

+

-

Surge

X

L

N

Power Supply

+

-

Spike

24V

Nov. 2015 / Rev. 1.4 DS--ML60.121-EN

All parameters are specified at 12V, 4.5A, 230Vac 50Hz input, 25°C ambient and after a 5 minutes run-in time unless otherwise noted.

www.pulspower.com Phone +49 89 9278 0

Germany