05.2004 Mounting, Connecting-up
Siemens AG 6SE7087-7CX87-2DA0
SIMOVERT MASTERDRIVES Unité de Freinage / Braking Unit 3-1
3 Mounting, Connecting-up
♦ Braking units are mounted next to SIMOVERT MASTERDRIVES on
a G rail or using M6 screws.
♦ Braking unit:
Connect the terminals C/L+ and D/L- (top side of the braking unit) to
the terminals C/L+ and D/L- of the drive (see Fig. 3-1).
• The connecting cables should be max. 3 m long and twisted.
• For several inverters in parallel with a common DC bus, the
braking unit should be connected to the inverter with the highest
rating.
♦ Connecting braking units in parallel:
• Only braking units with the same ratings or the next highest or
next lowest rating (see Table 7-1) may be connected in parallel.
• Each braking unit must have its own twisted feeder cable, max.
length 3 m
.
♦ External braking resistors (selection list see chapter "Braking
Resistors")
• 5 kW to 20 kW Disconnect jumper between terminals H1
and H2, connect resistor to Terminals G and
H2.
• 50 kW to 200 kW Connect the resistor to terminals G and H.
• Length of the connecting cables between braking unit and
external braking resistor < 15 m.
Mis-connecting or shorting the DC bus terminals will destroy the drive
and the braking unit, respectively.
5 kW to 20 kW If an external resistor is connected, the jumper
between H1 and H2 must be removed, otherwise
the unit or the braking unit may be destroyed!
For braking units with an internal brake resistor, the air discharge
temperature can be > 80 °C.
Mounting
Connecting-up
WARNING
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