Impulse Control - ABB OTM_C Series Installation And Operating Instruction

2. Turn the Motor/Manual selection switch to the Motor (M) position, see Figure 6.2.
I
0
I I
Figure 6.2 Motor/Manual selection switch in the Motor (M) position
3. Operate the motorized change-over switch with the push-buttons or selector switch via impulse
control or continuous control.
The motor operator is protected from overloading by a fuse (F1) under the motor
operator. Only use the same type of fuse that is described on the label close to
the fuse.

6.1.1 Impulse control

When using impulse control, the change-over switch is operated by electric impulses. When you
press the control button, the change-over switch is driven to the corresponding position (I, 0, II). The
control impulse must last more than 100ms to take effect. A new command cannot be given until
the change-over switch has reached the position of the previous command. Figure 6.3 shows the
operation of the change-over switch with impulse control.
If a new command is given before the switch has reached the position of the
previous command, the fuse (F1) may operate.
>100 ms
I - position
0 - position
I+II ( CL)
_
II -position
Figure 6.3 Figure 6.3 Impulse control Impulse control
1SCC303002M0206 l ABB Installation and operating instructions, 34OTM_C rev. F l 21
M M
M a n . M a n .
I
I - command
M M
M a n .
M a n .
II
>100 ms
II - command
6. Operating
0 0
I+II
( CL)
_
>100 ms
0 - command