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Operating and Maintenance Instructions
3.0
Overview
3.1 Specification
(Reverse Polarity Protected)
Enclosure Dimensions See Appendix A – Physical Details
Operating Environment -20°C to +60°C, 90%RH at 40°C max.
LCD Backlight Lifespan Typ. 50000 hours of continuous operation at full backlight
EMC Compliance BS EN61000-6-3 (emissions)
* Patent GB 2 431 303
3.2 Installation
Avoid exposure to vibration, high temperatures. The unit shall be installed according to relevant safety guidelines
and requirements. Attention should be paid to local regulations and guidance.
3.3 Hot plugging
Hot plugging the controller is permissible, however, if a new or replacement controller is not at factory default
settings, it will need to be reset to such.
3.4 RS485 wiring installation
For reliable communication with the fans, it is recommended to use shielded twisted pair cable with 120Ω
impedance (RS485 standard cable), in a "Daisy Chain" wiring layout, and run it separated from mains supply wiring.
We recommend placing the controller at one end of the RS485 network and to add a 220Ω termination resistor at
the other end of the network cable as shown below:
In case the controller is in the middle of the network, the built-in termination resistor must be taken out of the
circuit by removing the jumper bar located on back of the PCB. If that is the case, two resistors of the same value
must be added at each end of the network.
210-OMI14229-Iss8.1
© ebm-papst UK Ltd 2021
Product Modbus Display & Control - CN1116
Supply Voltage
Two sets of connections are provided for either:
•
9 VDC to 57VDC from an optional external PSU or
•
10 VDC sourced from connection to at least two EC fans 10V
reference outputs* in parallel. Note that fans' reference must be the
>=10 mA version.
Supply Current 10mA (low LDC backlight) – 40mA (full LCD backlight)
Enclosure CN1116 – wall mount
Weight 204 g
BS EN61000-6-2 (immunity)
Table 2 - Specification
Figure 1 - Schematic of RS485 installation
CN1116 Full OMI
Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: +44(0)1245468555 Fax: +44(0)1245466336
e-mail
sales@uk.ebmpapst.com
220Ω
Page 7 of 47
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