ABB RMU811 Thermocouple module

A limit switch logic can be realized with these inputs. For a running of the motor in positive direction the input Pos.Stop is to be connected to +15V ... +30V. When the connection is interrupted, e.g. by a limit switch (normally closed contact), the positive set values will be suppressed and the motor is therefore braked with the maximum adjusted pulse current. Negative speeds are still possible. Simultaneously with the active stop function the integral-action component is being switched off. The same applies for the Neg.Stop input, but for the negative rotational direction.

Reference ground for measuring the conditioned tachometer voltage. 

Avoid external connection with GND or Power-GND of the device, not via protective earth terminal either (ground loops). 4b, 4d Set value+; Set valueInputs of a differential amplifier to define the speed set value. Terminal 4d has a positive effect against 4b. The maximum differential voltage must not exceed ±10V. Always both inputs have to be wired, e.g. set value + at the output of the D/A converter and set valueat the output of the analogue GND of the D/A converter.

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