About The Subnetwork Data Bus; Subnetwork Connection Method - Distech Controls ECL/ECB-PTU Series User Manual

About the Subnetwork Data Bus

ECL and ECB Distech Controls' controllers use the subnetwork data bus to support various
optional modules that add extra inputs, outputs, sensor inputs (temperature, humidity, CO2,
motion, receive wireless commands from a remote control), and interactive screen menus for
user control. The subnetwork data bus uses the EIA-485 (Electronic Industries Alliance) stan-
dard for data transmission.

Subnetwork Connection Method

Connection to the subnetwork data bus can be made as follows:
• All ECB and ECL series controllers are equipped with an RJ-45 Subnet Port to quickly
connect expansion modules and sensors in a daisy-chained fashion to the subnetwork
using a Cat 5e cable (standard straight Ethernet patch cable). Any device that connects to
a controller's Subnet Port is collectively referred to as room devices.
• In addition, the ECB-600 and ECL-600 Series controllers can be connected to one or two
ECx-4XX I/O Extension Modules using the same subnetwork data bus, however the con-
nection is made through the controller's Subnet+ and Subnet screw-type terminal block
connectors using a 2-wire twisted-pair shielded cable.
This is summarized in the table below.
Table 15: Subnetwork Connection Method
Subnetwork Room Device or
Extension Module
Allure EC-Smart-Vue series
Allure EC-Smart-Comfort series
Allure EC-Smart-Air sensor
series
EC-Multi-Sensor series
ECx-Light-4 / ECx-Light-4D /
ECx-Light-4DALI
ECx-Blind-4 / ECx-Blind-4LV
ECx-Display
ECx-4XX Series I/O Extension
Module
70
Type
Room Device: Sensors
Room Device: Application
specific expansion modules
Colour LCD display
Extension Module
Connection Method
Cat 5e cable with RJ-45 connec-
tors - See Cat 5e Cable Subnet-
work Data Bus on page 79.
2-wire twisted-pair shielded cable
- See 2-Wire Subnetwork Data
Bus on page 92.
Network Guide