| |
Electronic motor starters and drives
Rapid Link system
|
Motor control unit
Motor control unit RA-MO allows the direct bidirectional
operation of three-phase motors. The rated current is adjustable from
0.3 to 6.6 A (0.09 to 3 kW). |
Connections
Motor control unit RA-MO is supplied ready for installation. The
connection to the AS-Interface® data bus and the motor is described
below. The connection to the power bus is described in the earlier
general section “Rapid Link system”. |
 |
The unit is connected to AS-Interface® through an M12
plug with the following PIN assignment:
 |
External sensors are connected
through an M12 socket.
 |
On the RA-MO the motor feeder features a
plastic-encapsulated socket. The length of the motor cable is limited to
10 m.
The motor is connected through a halogen-free, 8 × 1.5 mm²,
unscreened, DESINA-conformant motor supply cable with a length of 2 m
(SET-M3/2-HF) or 5 m (SET-M3/5-HF).
Alternatively you can assemble your own motor supply cable with plug
SET-M3-A with 8 × 1.5 mm² contacts
|
 |
Motor connection without thermistor
 |
If motors are connected without PTC thermistor (thermoclick),
cables 6 and 7 must be linked at the motor; otherwise the RA-MO issues a
fault message.
Motor connection with thermistor
 |
Note:
The two connections illustrated below apply only for motor control unit
RA-MO.
Connecting a 400 V AC brake:
Connecting a 400 V AC brake with rapid braking: |
For controlling braking motors, their manufacturers provide braking
rectifiers, which are fitted in the motor terminal strip. If the DC
circuit is opened at the same time, the voltage at the braking coil
drops off much quicker, causing the motor to also brake more quickly.
|
| |
| |
