Multi-Sensor Operation; Sensor Wiring And Airline Connections; Figure 18 - Sensor-Fan Wiring Diagram With Power Supply; Figure 19 - Simplified Sensor-Fan Wiring Using Ebm-Papst Differential Pressure Sensors - ebm-papst CN1116 Operating And Maintenance Instructions Manual

Operating and Maintenance Instructions
supported by the controller we recommend manually changing each fan to the factory default settings of 19200
Even 1.
Factory Reset (See H27 – Advanced Settings – Factory Reset): Resets the controller to factory default settings
and all connected fans to Modbus address 1 and 0-10V control.
8.0

Multi-Sensor Operation

The controller can operate with multiple 0-10V differential pressure sensors to increase air flow measurement
accuracy, display air volume/pressure of individual fans and add system redundancy in case of sensor failures.
This section contains information about sensor wiring, airline connections and how to setup the controller for multi-
sensor operation.

8.1 Sensor wiring and airline connections

Wiring: Connect the 0-10V output from the sensor to the fan's 0-10V input. The wiring diagram below applies to
differential pressure sensors that require an external power supply:
We recommend using ebm-papst SN1120 or SN1121 series differential pressure sensors as they have been
specifically designed for fan arrays and can be powered from a fan's 10V 10mA, or 24V supply. It simplifies the
installation as shown in the new wiring diagram below:
Figure 19 – Simplified sensor-fan wiring using ebm-papst differential pressure sensors
ebm-papst SN1120 and SN1121 differential pressure sensors can greatly reduce commissioning time, cost and
complexity of the installation by eliminating the external power supply, sensor zero adjustment and specific
mounting positions as they can be mounted at any given orientation without compromising their accuracy.
Note 2: Please ensure that the selected fan 0-10V input terminal where the sensor output is connected to
is the same as the 0-10V input terminal configured at the controller in the "Fan Sensor Input" menu. See
210-OMI14229-Iss8.1
© ebm-papst UK Ltd 2021
Figure 18 – Sensor-Fan wiring diagram with power supply
Note 1: Do not connect more than one sensor per fan.
8.2 Controller configuration and automatic sensor
CN1116 Full OMI
Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: +44(0)1245468555 Fax: +44(0)1245466336
e-mail sales@uk.ebmpapst.com
Fan Input Terminal:
GEN2 Fans: AIN1U or AIN2U
GEN3 Fans: IO2 or IO1
Fan Input Terminal Name:
GEN2 Fans: AIN1U or AIN2U
GEN3 Fans: IO2 or IO1
mapping
.
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