Control Techniques Unidrive User Manual

Unidrive SP Low Voltage DC Installation Guide 23
Issue Number: 1 www.controltechniques.com
Safety Information Introduction Product information
System design
Component data Index
Table 4-5 Key for Figure 4-7
4.6.7 Control implementation for system configuration 2
In order to achieve the required Low Voltage DC operation sequencing as detailed in
section 4.7 Power circuit control logic and sequencing on page 24. The circuitry shown
in Figure 4-7 and Figure 4-8 below are required.
Some of the circuitry shown in Figure 4-8 can be reduced by using SM-Applications, this
is further discussed in section 4.7.2 Control implementation using SM-Applications on
page 26..
Figure 4-8 Control relays for system configuration 2
Key Description
Aux.1 Ovld.1 auxillary contact
Aux.2 Ovld.2 auxillary contact
Aux.3 Ovld.3 auxillary contact
Ovld.3 Thermal overload relay for high voltage braking resistor
Ovld.2 Thermal overload relay for low voltage braking resistor
D1 Blocking diode to prevent energy from being returned to the LVDC supply
Ovld.1 Thermal overload relay to protect the discharge resistor
F1a 3 phase AC supply fusing
F2a Fuse for LVDC supply feed to drive +DC terminal
F2b Fuse for LVDC supply feed to drive -DC terminal
F2d Fuse for LVDC mode enable input.
F3 Fuse for drive control 24V external input
K1 Normally open contacts supplying the drive with 3 phase AC when energized
K1a Normally closed contacts supplying the LVDC mode enable terminal
K1b
Normally closed contacts that bring in the discharge resistor when the AC supply is removed
K2a
Normally open contact, which when closed supplies the drive with the positive feed
form the LVDC power supply
K2b
Normally open contact, which when closed supplies the drive with the negative feed
from the LVDC power supply
K2d
Normally closed contacts that bring in the discharge resistor when the DC supply is removed
K2f Normally open contacts which when closed bring R_LVDC into circuit
PS1 LVDC power supply
Rly1 Softstart relay that brings the softstart resistor in/out of the DC supply circuit
Rdis DC bus discharge resistor
Rs External softstart resistor
R_LVDC Low voltage braking resistor
R_norm High voltage braking resistor
K1c
K2d
K3a K2e
K3b K1d
K4a
K5a
K2
K1
K5
K4
K3
AC Supply
select
Enable
input
Drive
enabl
e
Aux.1
Aux.2 Aux.3
Timer Coil, Delay ON
Relay Coil
Normally Open Contacts
Normally Closed Contacts
Key:

Control Techniques Unidrive Specifications

General

Brand	Control Techniques
Model	Unidrive
Category	Power Supply
Language	English