C
ONTROL
UNIT
Honeywell
• 48
6
6.
C
ONTROL
UNIT
The control unit of the drive consists of the control board and additional boards (option boards)
connected to the slot connectors of the control board.
Figure 48. 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 spe-
cifically ordered. On the next pages you will find the arrangement of the control I/O and the re-
lay terminals, the general wiring diagram and the control signal descriptions.
The control board can be powered externally (+24VDC, ±10%) by connecting the external pow-
er source to terminal #30, see page 52. This voltage is sufficient for parameter setting and for
keeping 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.
1
2
3
4
Locations of essential control unit components:
1 = Control terminals of the control board
2 = Terminals of relay board;
NOTE:
There are
two different compilations of relay boards
available. See section 6.1.
3 = Optional boards
4 = Disconnecting jumper for digital inputs, see
chapter 6.1.2.2
Summary of Contents for SmartVFD HVAC MR4
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Page 49: ...Honeywell 47 COMMISSIONING ...
Page 78: ...STARTUP Honeywell 6 ...