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Onil

1391B DROK and Velocity Command

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Do not understand what to connect to DROK contact input/output and what connect to Velocity command? From manual: * A number of Fault Monitor and Detection functions exist on the 1391B-ES that guard the controller and help to minimize motor and system faults. The occurrence of a fault will cause the controller to trip out. In this condition, the Drive OK (DROK) contact will open and remain open until the fault is cleared. If the DROK contact is wired into the user’s stop circuit, the line/DB contactor (M) will also de-energize. This will place the shunt resistor across the bus causing the motor to dynamic brake to a stop. ** Velocity Command Input (TB2, Terminals 1, 2) The controller will accept up to a ±10V DC velocity command signal to achieve maximum motor speed. The plus (+) and minus (–) reference are at terminals 2 and 1, respectively. Shield must be terminated at source end only. The differential impedance of the velocity command input is 40 kohms (20k ohms for single ended inputs). Edited by Onil

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Typically, the DROK and command reference lines would be connected to a motion controller. The DROK would be connected to an input on the motion controller designated to inform the motion controller when the servo drive faults. The command reference would be connected to the voltage output signal from the motion controller.

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