EBM Papst 169893 Controller

The device converts an analog standard signal (0…10 V or potentiometer and 4…20 mA) into a PWM signal (0…100% duty cycle). It provides two different types of PWM control interfaces (OC – Open Collector and OP – Open Collector with pull-up), each of which outputs the same duty cycle. In addition, an analog 0…10 V output AO is available, which also outputs the same speed. If both signal inputs (AI-U and AI-I) are wired, the higher resulting speed control signal is output.

The module monitors the speed of up to two fans at TA1 and TA2 that have Hall-type outputs (tacho). Via the DIP switch S2, you can set for each of the two ventilator connections whether or not it is monitored. With another DIP switch S1 the number of echo pulses per revolution dependent on the ventilator type must be set. The device thus calculates the speed from the fan's tachometer signal and compares this with a fixed threshold. The module reports when the threshold value is undercut by the alarm contact and a red LED which is present at each of the two fan connections.
The alarm contact (potential-free normally open contact) is operated in such a way that it is closed in error-free mode or when the speed control signal is less than 15% and falls off in case of an error or voltage failure. An error occurs when the speed threshold for min. at a monitored fan connection. Under 10 seconds. If the error is no longer present, the alarm contact is reset. Fault monitoring is only active if the speed control signal min. 15 %. The monitoring of the fans is only activated 10 seconds after the power supply is switched on or after the 15% threshold of the speed control signal has been exceeded. The alarm contact is activated during this startup time.

Application:
- Speed control and failure detection of motors/fans in control cabinets, heating, ventilation and air conditioning units which have a PWM / 0…10 V control input and / or a Hall output
- Conversion of an analog standard signal (e.g. output of a PLC) into a PWM signal for the speed setting of motors and fans that have a PWM / 0…10 V control input
- Speed control by means of a potentiometer (externally connected, not integrated) of motors and fans that have a PWM / 0…10 V control input

This text is machine translated.