CS AM series modules can be used with DC or AC electric motors. Speed of rotation can be detected on AC motors generally (mono-phase and three phase), while direction of rotation can be detected on three-phase AC motors.
Sensorless monitoring
CS AM series modules use sensorless technology enabling various safety functions through direct connection of the CS AM module to the windings of the electric motor. The motor-standstill monitoring function is performed by monitoring the residual voltage generated by the rotating motor. The motor speed monitoring function is performed by measuring the frequency of the rotating magnetic field of the electric motor. By determining the phase shift between the voltages at the ends of two different windings, it is possible to identify the direction of rotation of the motor.
Additional diagnostics
With CS AM series modules, a proximity sensor can be connected to input I4, setting up safety functions with additional diagnostics functions on mechanical transmission components. The proximity sensor must be positioned to detect the teeth of a tone wheel that is integral with the shaft driven by the mechanical transmission components. This makes it possible to detect events such as breakage of transmission belts or chains, and to identify situations in which the motor is overloaded or the rotor is blocked.
Combined safety functions
CS AM2 and CS AM3 series modules can combine the safety functions for detection of motor speed and direction of rotation. More specifically, it is possible to configure the "DUAL SPEED" combined function, which enables the user to set different speed thresholds for the two different directions of rotation, and the "SPEED & ROTATION" combined function, which activates the safety outputs of the module if the speed detected is within the set threshold and the direction of rotation is as expected.
OSSD safety outputs
CS AM series modules are also available with OSSD solid-state safety outputs. Modules equipped with OSSD solid-state safety outputs have the benefit of occupying less space in the switching cabinet. The width of modules ranges from 45 mm for relay versions to 22.5 mm for OSSD versions.
Two simultaneous safety functions
CS AM series modules are also available with two independent OSSD solid-state safety outputs or with two independent pairs of safety relays. With these models, it is therefore possible to create two different safety functions simultaneously, associating each function with one of the two available inputs.
Configuration of parameters
Using the CS AM Configurator software, it is possible to configure the module outputs and inputs, set active functions and define the parameters according to the characteristics of the application and the motor. This makes the product highly flexible and adaptable for a great range of applications.
Real-time monitoring
Real-time monitoring of motor state and electrical measurements taken by the module. This view allows real-time analysis of the behaviour of motor and module during use of the application, helping the user to check that the configuration of parameters effectively meets the requirements of their application.