Control Unit - Siemens BT300 Manual

Control unit

5. C
ONTROL UNIT
The control unit of the AC drive consists of the control board and additional boards (option boards) con-
nected to the slot connectors of the control board.
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Figure 44. Location of control unit components.
When delivered from the factory, the control unit of the drive contains the standard controlling interface
- the control terminals of the control board and the relay board - unless otherwise specifically ordered.
On the next pages you will find the arrangement of the control I/O and the relay terminals, the general
wiring diagram and the control signal descriptions.
The control board can be powered externally (+24 VDC, 100 mA, ±10%) by connecting the external
power source to terminal #30, see page 49. This voltage is sufficient for parameter setting and for keep-
ing the control unit active. Note however that the measurements of the main circuit (e.g. DC-link voltage,
unit temperature) are not available when the mains is not connected.
24-hour support +1-800-877-7545 (Dial 2)
Locations of essential control unit components:
1 = Control terminals of the control board
2 = Terminals of relay board
3 = Optional boards
2
3
9058.emf
NOTE:
There are two different compilations of
relay boards available. See section Chapter 5.1.
Siemens Industry, Inc. • 47
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