7/9
P100002807 A
When a wireless VAV controller is being used, the wireless receiver will be
temporarily disabled when an EY-RU483F001 is attached to the controller until it is
unplugged. It is not possible to simultaneously use the wireless option with the EY-
RU483F001.
Wiring EY-modulo4 Room Operating Unit to a LON Network for Technician Use
5.3
The LON terminals within the EY-modulo4 Room Operating Unit can be optionally wired to the
LON terminals of a controller. If inserting multiple wires in the terminals, ensure to properly
twist wires together prior to inserting them in the terminal connectors.
A laptop can then access the LON network by plugging into the EY-modulo4 Room Operating
Units communications jack with a 1/8“ audio cable.
To wire a computer to the LON network via a EY-modulo4 Room Operating Unit do the
following:
Remove the front plate of the EY-modulo4 Room Operating Unit.
1.
Connect the LON output terminals of the EY-modulo4 Room Operating Unit to the LON1
2.
and LON2 input terminals on the controller.
Connect the two (2) wires that terminate with the 1/8“ audio cable to the output terminals
3.
of the PCLTA card on the computer. Other methods of connecting to the computer are
possible.
Insert the 1/8“ audio cable into the communications jack of the EY-modulo4 Room
4.
Operating Unit.
B11620
Smart-Sensor
Computer
1/8" Com. Jack
LON2
LON1
Controller
LON
LON
LON
T2
T1
Wiring Smart-Sensor to a LON network for technician use
Fig. 7
The recommended cable type for LON communications is 22AWG (0.65mm), twisted pair,
unshielded. The LON communication wire is polarity insensitive and can be laid out in a bus,
star, loop or free topology. For loop topology, polarity is important, special care must be taken
when connecting the LON network to avoid short circuit.
For more information and detailed explanations on network topology and wire length
restrictions, please refer to the Junction Box and Wiring Guideline for Twisted Pair LonWorks
®
Networks, published by Echelon
®
Corporation.
