Supplying The Drive With Dc / Dc Bus Paralleling; Heatsink Fan Supply; Control 24Vdc Supply; Figure 4-9 Location Of The Size 6 Heatsink Fan Supply Connections - Emerson unidrive sp User Manual

Safety Product Mechanical
Information Information Installation
Model sizes SP1405 to SP4606 have an internal DC choke and SP5201
to SP6602 have internal AC line chokes, so they do not require AC line
reactors except for cases of excessive phase unbalance or extreme
supply conditions.
When required, each drive must have its own reactor(s). Three individual
reactors or a single three-phase reactor should be used.
Reactor current ratings
The current rating of the line reactors should be as follows:
Continuous current rating:
Not less than the continuous input current rating of the drive
Repetitive peak current rating:
Not less than twice the continuous input current rating of the drive
4.2.3 Input inductor calculation
To calculate the inductance required (at Y%), use the following equation:
Y V 1
--------- - × ------ - × ----------- -
L =
100 2πfI
3
Where:
I = drive rated input current (A)
L = inductance (H)
f = supply frequency (Hz)
V = voltage between lines
4.3 Supplying the drive with DC / DC bus
paralleling
The connecting of the DC bus between several drives is typically used to:
1. Return energy from a drive which is being overhauled by the load to
a second motoring drive.
2. Allow the use of one braking resistor to dissipate regenerative
energy from several drives.
There are limitations to the combinations of drives which can be used in
this configuration.
For application data, contact the supplier of the drive.
4.4

Heatsink fan supply

The heatsink fan on size 0 to 5 is supplied internally by the drive. The
heatsink fan on size 6 requires an external 24Vdc supply. The
connections for the heatsink fan supply must be made to the upper
terminal connector near to the W phase output on the drive. Figure 4-9
shows the position of the heatsink fan supply connections.

Figure 4-9 Location of the size 6 heatsink fan supply connections

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Figure 4-10 Size 6 heatsink fan supply connections

65 64 63
55 54 53
To the heatsink fan
Pre-wired internally
The heatsink fan supply requirements are as follows:
Nominal voltage:
Minimum voltage:
Maximum voltage:
Current drawn:
Recommended power supply: 24V, 100W, 4.5A
Recommended fuse:
4.5

Control 24Vdc supply

The 24Vdc input has three main functions.
• It can be used to supplement the drive's own internal 24V when
multiple SM-Universal Encoder Plus, SM-Encoder Output Plus, SM-
I/O Plus, or SM-I/O 32 modules are being used and the current
drawn by these modules is greater than the drive can supply. (If too
much current is drawn from the drive, the drive will initiate a 'PS.24V'
trip)
• It can be used as a back-up power supply to keep the control circuits
of the drive powered up when the line power supply is removed. This
allows any fieldbus modules, application modules, encoders or serial
communications to continue to operate.
• It can be used to commission the drive when the line power supply is
not available, as the display operates correctly. However, the drive
will be in the UV trip state unless either line power supply or low
voltage DC operation is enabled, therefore diagnostics may not be
possible. (Power down save parameters are not saved when using
the 24V back-up power supply input).
The working voltage range of the 24V power supply is as follows:
Maximum continuous operating voltage:
Minimum continuous operating voltage:
Nominal operating voltage:
Minimum start up voltage:
Maximum power supply requirement at 24V:
Recommended fuse:
Minimum and maximum voltage values include ripple and noise. Ripple
and noise values must not exceed 5%.
Onboard Advanced Technical
PLC parameters Data
24V heatsink fan supply
0V
Not used
62 61 60
Upper terminal connector
52 51 50 Lower terminal connector
0V
24V low voltage DC mode enable
24Vdc
23.5Vdc
27Vdc
3.3A
4A fast blow (I
Unidrive SP User Guide
UL Listing
Diagnostics
Information
2 2
t less than 20A s)
30.0 V
19.2 V
24.0 V
21.6 V
60 W
3 A, 50 Vdc
Issue Number: 13