Chapter 4 – Electrical Installation
4-2 Installation and Start-up Guide for NBRA-6xx
Control Connections
The chopper control connections are shown below. The chopper is also
operational without the control connections.
Figure 4-1 Control connections.
The use of the relay output for controlling the main contactor of the
ACS 600 is highly recommended (see page 4-3). The enable input and
the fibre optic connection are optional (see page 4-4).
The terminals for the control connections are on the chopper control
board (NBRC), located inside the chopper housing. The front plate of
the chopper must be removed to access the terminals.
WARNING! Before starting the installation work inside the ACS 600:
Switch off the ACS 600 power supply. Wait for five minutes to ensure
that the intermediate circuit is discharged. Switch off dangerous
voltages connected from external circuits to the digital inputs and to the
relay outputs of the ACS 600.
WARNING! Do not touch the printed circuits. They are extremely
sensitive to electrostatic discharge.
X2
X3
1
2
1
2
3
NBRC
X3 Fault Indication Relay Output
1 normally open Continuous current: 2 A RMS
Switching capacity:
8 A, 24 V d.c.
0.4 A, 120 V d.c.
2000 VA, 250 V a.c.
2 common
3 normally closed
X2/X1* Enable Input
1 (Normally closed)
Closed = Operation enabled
Open = Operation disabled
2
Fibre Optic Cable Connection
(Refer to page 3-2)
V23 Chopper control signal from another
chopper (Receiver)
V22 Chopper control signal to another
chopper (Transmitter)
NBRA-653/654/655/656/657,
NBRA-663/664/666/667
t°
X2
X3
1
2
1
2
3
NBRC
NBRA-658/659,
NBRA-669
t°
X1
1
2
*The NBRA-658, NBRA-659 and NBRA-669 are
equipped with an internal temperature sensitive
switch. In these units, NBRC terminal block X2
is wired via this switch to a separate terminal
block (X1), shown in the NBRA-658/659/669
t°
1
2
dimensional drawing.
V23
V22
V23
V22
To Next Page
Loading...