Appendix E: LonWorks Protocol Implementation Conformance Statement
RTU Open v5
CARRIER CORPORATION ©2019
Integration Guide
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60
Date: 11/12/2013
Vendor Name:
Carrier
Product Names:
RTU Open
Product Model Number:
RTU Open
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
J15
connector on the RTU Open. The RTU Open’s baud rate (
DS1
and
DS2
on
SW3
) must be set to 38.4k to
communicate with the LON-OC. The address switches (
SW1
and
SW2
) are not used with LonWorks.
Transceiver Type
: TP/FT 10
Appendix E: LonWorks Protocol Implementation Conformance Statement
