Appendix E: LonWorks Protocol Implementation Conformance Statement
RTU Open v3 Carrier Proprietary and Confidential CARRIER CORPORATION ©2016
Integration Guide All rights reserved
51
Vendor Name:
Product Names:
Product Model Number:
Product Description:
The RTU Open is a factory-installed rooftop controller that is capable of speaking multiple protocols. When the
LonWorks Option Card (LON-OC), is installed in the field, it enables the RTU Open to communicate over a LonTalk
network. The RTU Open does not conform to a standard LonWorks profile, but is self-documenting and any
network management tool can manage and configure it over the network. An external interface file (.XIF), is also
available so that any network management tool can design and configure the RTU Open prior to installation.
Contact your Carrier representative for this .XIF file.
LonWorks is an open protocol that requires the use Echelon's Neuron microprocessor to encode and decode the
LonWorks packets. In order to reduce the cost of adding the Echelon chip to every module, a separate LonWorks
Option Card (LON-OC) was designed to connect to the RTU Open.
This accessory card must be ordered separately and is connected by attaching its ribbon cable into the
connector on the RTU Open. The RTU Open’s baud rate (
and
on
) must be set to 38.4k to
communicate with the LON-OC. The address switches (
and
) are not used with LonWorks.
: TP/FT 10
Appendix E: LonWorks Protocol Implementation Conformance Statement
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