3RW3 semiconductor motor control unit
SIRIUS System Manual
8-32
GWA 4NEB 430 0999-02b
Position of the termi-
nals
3RW30
The following graphic illustrates the position of the terminals and the poten-
tiometers for adjustment.
Figure 8-16: Position of the terminals and the potentiometers for adjustment
3RW31
The 3RW31 soft starters are available in frame size S0. Outwardly, they dif-
fer from the 3RW30 in the labeling of the contacts and the terminals:
• There is no BYPASSED auxiliary contact. The free contact is used to
enable the necessary drive contact IN2 to switch between the ramp
times t
R1
and t
R2
.
• The 3RW31 does not have a coasting-down ramp. The potentiometer with
which the coasting-down time is adjusted on the 3RW30 is used here to
set the second ramp time t
R2
.
• There is no ON auxiliary contact.
Line length of the con-
trol cable
To eliminate problems with the cable coupler capacitances, the control cable
should be shorter than 15 m. (This is based on devices with a rated control
supply voltage of UC 24 V to 50 m.)
To eliminate problems in control cables that are fed out of the cubicle, cou-
pling links must be used.
8.3.6 Event messages and diagnostics
Event messages
Table 8-14: 3RW30/31 event messages
5
10
20s
0
max
min
5
10
20s
0
1 L1 3 L2 5 L3
3RW
A1A2
1
13 14/23 24
2 T1 4 T2 6 T3
5
10
20s
0
max
min
5
10
20s
0
1 L1
2
T1
3
L2 5
L3 IN1 A1
4
T2 6 T3 A2
Frame size S00
3RW301.
Frame size S0 to S3
3RW302./303./304.
READY LED
Continuous
Flashing
Ready for operation
while starting up or coasting
down
BYPASSED LED Continuous Bypassed
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