Delta Elektronika SM3300 Series Product Manual page 13

INSTALLATION
 No neutral connection is required on a 3 phase grid.
 For a single phase grid, connect between L1 and L2.
 After installation, connect the pull relief and add the safety
cover over the input.
5.4.2 DC POWER TERMINALS
 Theses terminals are located at the rear side, marked as
CON B1 and CON B2.
 For cable diameters and mounting torque (see table 5 - 1).
 Use cables with a sufficient voltage rating for the output
voltage of the unit.
 With high output current, make sure to use low resistive
connections between the power supply and the load:
- Before connecting the power cables, first remove the remote
sensing connector in order not to damage it.
- Mount the cable lugs directly on the output strips followed
by a washer, a split washer and a nut (see fig. 5 - 4).
Always in this order!
- Never place washers between the lugs and the strips
because this can result in excessive heat!
- Only use nuts and washers supplied with the unit.
 Minimize the inductance in the leads by keeping them close to
each other or by using a multi-strand cable.
 The power outputs are floating in relation to the PE.
5.4.3 DC LOAD SENSING (REMOTE SENSING)
 This connector is located at the rear side, marked as CON C.
 Use the included 4-pole header for connecting the sense
wires to the unit. By pressing the orange clips with a small
screwdriver, the wires can be inserted or released.
 When local sensing, check there is a link between + and S+
and between – and S– on the sense header (default).
 For remote sensing, please first read the paragraph 'Remote
Sensing' for more details.
 For remote sensing, remove the links between + and S+ and
– and S– from the header and connect sense leads to the
inputs for S+ and S–.
 Use cables with a diameter of 0.3 ... 0.5mm
sufficient voltage rating for the output voltage of the unit. The
leads are only thin measuring wires but always have to be
shielded. In order to prevent interference, it is advisable to
twist the leads. See fig. 5 - 5.
 With regards Safety, the sense terminals are at the level of
the Power Outputs. After installation add the safety cover over
the power output.
5.4.4 LAN-CONNECTOR
 This connector is located at the rear side, marked as LAN.
 For Ethernet programming or Web Interface control, insert a
standard RJ45 cable in the LAN connector at the rear side.
 With regards Safety, the LAN connector is at the level of
Protective Earth.
5.4.5 INTERLOCK CONNECTOR
 This connector is located at the rear side, marked as CON A.
 Use the included 3-pole header for connecting the interlock
wires to the unit. By pressing the orange clips with a small
screwdriver, the wires can be inserted or released.
 For more details and specifications about Interlock, please
read the paragraph 'Interlock Function' in this chapter.
 When the Interlock function is not used, connect a link
between terminal 1 and 3 of the Interlock header (default).
 Use cables with a diameter of 0.3 ... 0.5mm
sufficient voltage rating for the voltage of the circuit.
 With regards Safety, the Interlock connector is at PE level.
5.4.6 FRONT USB-CONNECTOR
 This connector is located at the front panel, in the lower right
corner under the display.
 With firmware package P0157, this connector is still disabled.
 With regards Safety, the Front USB-connector is at PE level.
 The USB connector is meant for direct connection of flash
drives.
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2
and with a
2
and with a
DELTA ELEKTRONIKA B.V.
fig 5 - 3
The two DC power terminals CON B1 and B2.
In between them the sensing connector.
fig 5 - 4
Local sensing with the power cables bundled close
together to minimize inductance.
fig 5 - 5
Remote sensing with shielded twisted wires and
the power cables bundled close together to
minimize inductance.
fig 5 - 6
The location of the LAN-connector (left) and the
Interlock connector (right) at the rear panel.
SM3300
rev. Jan. 2022