5/9
P100002807 A
B11649
Smart Sensor with front plate removed
Fig. 2
Wiring EY-modulo4 Room Operating Unit to a Controller
5.1
The EY-modulo4 Room Operating Unit uses a serial communication protocol and is designed
to connect to the serial inputs labelled SMRT+ and SMRT-on the VAV- or FC-controller. To wire
a wall-mounted EY-modulo4 Room Operating Unit to a controller, do the following:
Remove the front plate of the EY-modulo4 Room Operating Unit. There are 4 connection
1.
terminals and a 1/8“ communications jack within the device.
B11618
T1 T2 LON LON
1/8"
Com.
Jack
Smart-Sensor terminal description
Fig. 3
Connect the T1 and T2 output terminals of the Smart-Sensor to SMRT+ and SMRT- input
2.
terminals on the controller.
B11619
SMRT+
SMRT
-
T1
T2
Smart-
Sensor
Controller
Wiring Smart-Sensor to a controller
Fig. 4
The maximum wiring length for this type of connection is 15m. It is recommended
that all terminals be wired with 20-18AWG unshielded, twisted pair wire. It is not
possible to simultaneously connect to both the LON and SMRT inputs.
