Siemens 12-0TP50, Operating Instructions Manual

Page: 191 / 305

Connecting-up 06.2006
6SE7087-6KP50 Siemens AG
7-12
Operating Instructions SIMOVERT MASTERDRIVES
The 4-pole terminal strip serves to connect the external 24 V DC power
supply (supply from the supply unit or an AC/AC converter) and for
connecting a USS bus.
The USS bus connection is linked to the control electronics and the
9-pole Sub-D socket of the serial interface X103.
The bus terminating resistor can be switched in via switch S1 as
required. In the lower position, the bus termination is switched off.
The termination has to be switched in whenever the unit is located at
one end of the USS bus.
Terminal Designation Significance Range
33 +24 V (in) 24 V DC power supply DC 20-30 V
34 0 V Reference potential 0 V
35 RS485P (USS) USS bus connection RS485
36 RS485N (USS) USS bus connection RS485
Connectable cross-section: 2.5 mm² (AWG 12)
Terminal 33 is at the top when installed.
Table 7-6 External 24 V supply, USS bus
The unit draws a current of 1 A from the 24 V power supply. When
optional boards are plugged in, this increases to a maximum of 1.6 A.
The RS485 interface can be operated either via –X100 or –X103.
X100 - external
DC24 V supply,
USS bus
33
34
35
36
NOTICE