05.2005 Connecting-up
Siemens AG 6SE7087-2NP85-0AA0
SIMOVERT MASTERDRIVES Operating Instructions 7-7
The external braking resistor is connected to a terminal block on the top
of the unit.
Terminal Meaning
PE Protective conductor connection
H Braking resistor connection
G Braking resistor connection
Connectable cross-section:
For 50 kW rectifier unit: 25 mm² (AWG 2)
For 100 kW rectifier unit: 50 mm² (AWG 1/0)
Terminal PE is at left as viewed from the front.
Table 7-6 Braking resistor connection
The thermostatic switch of the braking resistor must be integrated in the
de-energization circuit of the main contactor.
7.2 Control connections
The unit requires an external 24 V voltage supply for operation.
The two-pole connection necessary for this is provided at the top of the
unit.
Terminal Designation Meaning Range
2 +24 V External 24 V supply DC 18 V - 30 V
1 0 V Reference potential 0V
Connectable cross-section:
♦ For 15 kW rectifier unit: 2.5 mm² (AWG 12)
♦ For 50 kW / 100 kW rectifier units: 4 mm² (AWG 10)
Terminal 1 is at the front when installed
Table 7-7 External 24 V supply
♦ In order to afford protection against direct contact, the external 24 V
power supply must be of the PELV system type (Protective Extra
Low Voltage). The power supply reference potential will then
definitely be grounded.
♦ Fuse –Fx must be fitted in order to protect the printed conductors
against overload in the event of a unit malfunction, e.g. a short
circuit in the control electronics or a wiring error.
♦ Fuse –Fx m.c.b. 6 A tripping characteristic C Siemens 5SX2 106-7.
X6 – Braking
resistor connection
PE H G
CAUTION
X9 - External
24 V supply
1
2
WARNING
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