Safety
information
Product
information
Mechanical
installation
Electrical
installation
Getting
started
User Menu A Commissioning
Advanced
Parameters
Diagnostics Optimization CT MODBUS RTU Technical Data
84 E300 Design Guide
Issue Number: 1
4.9 24 Vdc supply
The 24 Vdc supply connected to control terminals 1 & 2 provides the following functions:
• Can be used to supplement the drive's own internal 24 V supply when multiple option modules are being used and the current drawn by these
module is greater than the drive can supply.
• 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 communication options to continue to operate.
• 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 under voltage (UU) 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 24 V back-up power supply input).
• If the DC bus voltage is too low to run the main SMPS in the drive, then the 24 V supply can be used to supply all the low voltage power
requirements of the drive. Low Under Voltage Threshold Select (O13) must also be enabled for this to happen.
On size 6 and larger, if the power 24 Vdc supply is not connected none of the above mentioned functions can be used and “Waiting For Power
Systems” will be displayed on the keypad. The location of the 24 Vdc power supply connection is shown following.
Table 4-11 24 Vdc Supply connections
The working voltage range of the control 24 V power supplies are as follows:
Minimum and maximum voltage values include ripple and noise, ripple and noise values must not exceed 5 %.
Function Size 3 to 5 Size 6 and 7
Supplement the drive’s internal supply Control terminal 1, 2 Control terminal 1, 2
Back-up supply for the control circuit Control terminal 1, 2 Control terminal 1, 2, 50, 51
1 0 V
2 +24 Vdc
All drive sizes
Nominal operating voltage + 24.0 Vdc
Minimum continuous operating voltage + 19.2 V
Maximum continuous operating voltage + 28.0 V
Minimum start up voltage + 21.6 V
Maximum power supply requirement at 24 V 40 W
Recommended fuse 3 A, 50 Vdc
51 0 V
52 +24 Vdc
Size 6
Nominal operating voltage + 24.0 Vdc
Minimum continuous operating voltage + 18.6 Vdc
Maximum continuous operating voltage + 28.0 Vdc
Minimum startup voltage + 18.4 Vdc
Maximum power supply requirement 40 W
Recommended fuse 4 A @ 50 Vdc
Size 7
Nominal operating voltage + 24.0 Vdc
Minimum continuous operating voltage + 19.2 Vdc
Maximum continuous operating voltage + 30 Vdc
Minimum startup voltage + 21.6 Vdc
Maximum power supply requirement 60 W
Recommended fuse 4 A @ 50 Vdc
To Next Page
Loading...
