Siemens 6SE7087-8KN50 Instructions De Service page 218

Connecting-up
Type J - L:
X9 - external DC
24 V supply, main
contactor control
5
4
3
2
1
NOTE
WARNING
7-8
The 5-pole terminal strip is used for connecting up a 24 V voltage
supply and a bypass contactor.
The connection base is located easily accessibly on the DIN rail below
the slide-in unit of the electronics box.
The voltage supply is required if the inverter is connected up via a
bypass contactor.
The connections for the contactor control are floating.
Terminal Designation
5 Main contactor control
4 Main contactor control
3 n.c.
2 0 V
1 +24 V (in)
Connectable cross-section: 2.5 mm² (AWG 12)
Table 7-4 Connection of external DC 24 V aux. voltage supply and main contactor
control (type J-L)
The excitation coil of the main contactor has to be damped with
overvoltage limiters, e.g. RC element.
The 230 V fan has to be supplied with AC230 V externally. The
connecting points are located on the fuse-disconnectors on the right
next to the DIN rail of X9.
The external 24 V voltage supply must meet the requirements for safety
separation (PELV electrical circuit = Protective Extra Low Voltage).
Meaning
Main contactor control
Main contactor control
Not connected
Reference potential
DC24 V ... DC30 V
24 V voltage supply
6SE7087-7KN50
Operating Instructions SIMOVERT MASTERDRIVES
08.2008
Range
AC 230 V
1 kVA
0 V
For current
requirement
see section
"Technical
Data"
Siemens AG