Typical circuit diagrams
10.1 Connection examples for main and control circuits
3RW44 soft starters
218 Manual, 03/2017, NEB535219502000/RS-AB/008
3RW44 in a standard circuit with line contactor and control via PLC
Standard circuit with optional main
contactor
Control of an optional main contactor and control via PLC
* SITOR (optional) (optional line
contactor if motor is to be switched
*(Optional line contactor if motor is to be switched potential-free)
1)
For permissible main and control voltage values, refer to chapter Technical data of the
power unit (Page 259).
Note
2)
Risk of restart
The start command (e.g. issued by the PLC) must be reset when a group fault occurs,
because the motor attempts to restart again automatically if a start command is still active
fo
llowing this reset command. This particularly applies to motor protection tripping.
For safety reasons, you are advised to integrate the group fault output (terminals 95 and 96)
in the controller.
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