Operating and Maintenance Instructions
Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: +44(0)1245468555 Fax: +44(0)1245466336
Connections
Thermistor Connection +ve
0-10V control signal input
Thermistor connection GND (0V)
GND (0V) control signal input
Speed control output (User Configurable) - Open Collector PWM or Analogue 0-10V
Open collector Tacho input
10V or 12V to 57V DC supply
Configuration and alarm connector:
4-way Molex connector mating half part number: 50-37-5043
Female Crimp 22-28AWG:
08-70-1039 (Reel)
08-70-1040 (Bag of 100)
Function
The CGC provides a speed signal output to control fans whose input is either open collector PWM or 0-10V DC
analogue.
The controller is able to process inputs from a NTC thermistor or a 0-10V input and use it to control the output
signal in order to regulate fan speed. The input/output response profile is modifiable using the ebm-papst
graphical user interface software (GUI).
The GUI defines the input source (Temperature or Voltage), the fan speed response profile, among many other
features and saves the details in a configuration file for immediate or later download to the controller.
Alternatively, ebm-papst provides a set of pre-made configuration files available at: www.ebmpapst.co.uk/cgc.
The pre-made configuration files are derived from legacy CPC and EC controllers and must be used as their
direct replacement.
For details on how to use the GUI to re-configure a controller, please refer to operational manual 210-OMI14048
available from www.ebmpapst.co.uk/cgc
Alarms
The alarm output is an open collector signal. A pull up resistor is required to provide a signal from the alarm pin.
The alarm pin can sink up to 100 mA and accepts a maximum signal voltage of 60 V. The alarm active state (high
or low) is programmable via the GUI software.
Alarm Conditions
The alarm will trigger under the following conditions:
oThermistor open circuit –a break in the thermistor cable will cause an alarm, and the output to
the fan will default to run the fan at maximum speed.
oThermistor short circuit –A low resistance across the thermistor input terminals will cause an
alarm, and the output to the fan will default to run the fan at maximum speed
oThe thermistor readings exceed or fall behind a pre-programmed value or the 0V-10V input
signal exceeds or fall behind a pre-programmed value
oThe tacho signal registers a speed of less than 200rpm whilst target PWM is more than 10%
NOTE: For fans without a tacho output, the tacho dependent alarm can be disabled in the GUI
in order to avoid the controller defaulting to indicate an alarm condition. This helps preserving
temperature or voltage alarms for fans without a tacho output
