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(EN) Mounting:
1. Fasten the DIN rail (TH 35-15 or TH 35-7.5 acc. IEC/EN 60715) as shown in Fig. I on the mounting plate, horizontal mounting
position, input terminals on bottom, respect the minimum distance to other units (see Fig. I)
2. Snap on DIN rail as shown in Fig. II
1) Tilt the unit slightly upwards and fit the unit on the DIN rail
2) Lift it downward until it hits the stop
3) Press against the bottom front side for locking
Shake the unit slightly to check the locking
3. Remove the unit from the DIN rail as shown in Fig. III. Use a screwdriver for the unlocking.
Electrical connection:
o
Input side [L, N,
]
Connect the input terminals L, N,
Cable cross sections, stripping length of the cable, tightening torque etc. - see technical data.
The protective earth conductor must be connected (class of protection I).
The installation must be executed acc. EN 60950, provide a suitable disconnecting device (e.g., line protection switch)
in the supply line.
Fuse protection of the input side - see technical data.
Output side [L+, L+, L-, L-]
Rate the lines for the maximum output current or provide a separate fuse protection.
Fuse protection of the output side - see technical data.
We recommend choosing the cable cross section as large as possible in order to minimize voltage drops.
Observe the polarity.
The power supplies are overload, short-circuit and no-load proof (see characteristic curve).
The secondary side of the power supplies is electrically isolated from the input and internally not earthed (SELV) and
can therefore be earthed by the user according to the needs with L+ or L- (PELV).
Operating/Function:
Adjustment of the output voltage:
The output voltage can be adjusted in the range of 22.5 to 28.5 V by means of the potentiometer "OUTPUT Adjust".
Parallel operation:
In order to increase power and to enable redundancy, devices of the same type can be connected in parallel.
For a symmetric current distribution it is advisable to execute the line connections with the same cross sections and same lengths.
In order to improve the load distribution if the yellow LED indicates Power Reserve mode, reduce the output voltage by means of
the adjusting potentiometer ‚OUTPUT Adjust' until the yellow LED turns off.
Parallel operation, increased power: (see Fig. IV)
For n parallel connected devices, the output current can be increased to n x I
If a power supply unit can not handle the current requirement of the most powerful load, it is advisable to increase power by
parallel connected power supplies. Otherwise the loads should be spread among individual devices independent of one another.
A maximum of 5 devices of the same type can be connected in parallel.
Parallel operation, redundancy: (see Fig. V)
Redundant circuits are used to increase the operational reliability in case of errors (e.g., wrong wiring, blow of the fuses in the
primary circuit, failure of single devices). If a fault occurs in the first power supply circuit (called initial fault), power to all loads is
then supplied by the second, redundant supply circuit. For this reason the power supply units to be connected in parallel must be
sized in such a way that the total current requirement of all loads can be completely covered by one power supply unit.
Thermal overload protection:
To avoid destruction of the unit by overtemperatures, the unit switches off in case of thermal overload. After cooling down, the unit
resets automatically and is again ready for operation.
o
(Fig. I ).
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