The information required to connect the auxiliary circuits is provided in the connection diagram,
located on the inside of the terminal box cover, and in the machine documentation.
The required length of stripped insulation on conductors for auxiliary terminals varies: From 6
to 9 mm depending on the terminal type. When the length is correct, the bare conductor must
reach the center stop in the terminal and at the same time the conductor insulation must reach
the contact part of the terminal.
Brush monitoring
Signal transmitters for brush monitoring are installed, depending on the machine design.
The brush monitoring device senses the brush height limit value. Two millimeters before the
minimum permissible brush height is reached, a signal is output via a switch. In normal
operation and at medium speeds, you can then run your motor for another approx. 500 to 1000
hours. Replace the carbon brushes in good time.
The electrical connection requirements are shown on the terminal diagram pasted into the
terminal box.
Speed sensor
Electrically connect a built-on speed sensor in situ.
Temperature monitoring
Avoid hazards due to unexpected, automatic restarting of the installation after the temperature
protection has tripped. Implement this in the temperature evaluation and control.
WARNING
Automatic restart
Failure to ensure that the temperature monitoring prevents automatic restarting after the
machine has cooled can result in death and serious personal injury due to hazardous voltage
or rotating parts.
On machines with temperature sensors, design the temperature evaluation and control
circuits in such a way that it is impossible for the machine to switch on and start to rotate
automatically. .
Electrical connection
6.8 Connecting the auxiliary circuits
SIMOTICS DC 1GG6
Operating Instructions 02/2016 59
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