Device Addressing; Communications Wiring - Distech Controls ECB-VAVS Installation Manual

Subnet-Wiring
The subnet is used to connect a range of Allure Series Communicating
Sensors:
£ The Allure EC-Smart-Vue Series sensor is a communicating room
temperature sensor with backlit display graphical menus and VAV
balancing capabilities.
£
The Allure EC-Smart-Comfort and Allure EC-Smart-Air Communi-
cating Sensors are a range of communicating room temperature
sensors.
Connect the Allure Series to the controller's Subnet Port with a stan-
dard Category 5e Ethernet patch cable fitted with RJ-45 connectors.
Refer to the Network Guide for extensive information and requirements
for the connection of the Allure Series. It contains information about
network topology and length, cable type, setting the Subnet ID, etc. It
can be downloaded from the
also the Hardware Installation Guide supplied with the Allure Series.
If you make your own patch cable, see the Allure Series Hardware In-
stallation Guide.
Protect the controller's connector from being pulled on
when a cable to the Allure Series is connected. Create a
strain-relief by looping the cable and attaching it to a solid
object with a nylon tie so that a tug on the cable will not pull
out the connector on the controller.

Communications Wiring

The Network Guide provides extensive information and requirements to
implement a BACnet MS/TP network. It contains information about net-
work and sub network length, cable type, device addressing, etc. It can
be downloaded at the www.distech-controls.com
performance, use Distech Controls 24 AWG (0.65 mm) stranded,
twisted pair shielded cable or refer to the Network Guide for cable
specification. The BACnet MS/TP communication wire is polarity sensi-
tive and the only acceptable topology is to daisy-chain the cable from
one controller to the next.
£
The first and last daisy-chained BACnet MS/TP device must have
its EOL resistors enabled / installed. All other devices must have
their EOL resistor disabled (default factory setting).
£ When the BACnet MS/TP data bus is connected to a following de-
vice, twist data bus shields together or connect directly to the
shield terminal.
£
Isolate all shields with electrical tape so there is no exposed metal
that can touch ground or other conductors.
£
The shield of the data bus must be connected to the electrical sys-
tem ground at only one point – usually at one end of the bus as
shown below.
£
Connect no more than 50 devices to a BACnet MS/TP data bus.
NETWORK
ADDRESS
SHIELD
NET -
NET +
EOL
EOL ON
NETWORK NETWORK
ADD RESS ADD RESS
ADD RESS NETWORK
EOL OFF
EOL ON
EOL
SHIELD
SHIELD
MS/TP
MS/TP NET -
NET -
NET +
NET +
Front
Front
First and last daisy-chained device:
- EOL Switches are ON
All other Devices :
- EOL Switches are OFF
Figure 14: BACnet MS/TP Communications Wiring
If inserting multiple wires in the terminals, ensure to properly twist wires
together prior to inserting them into the terminal connectors.
www.distech-controls.com website. See
website. For optimal
NETWORK
ADDRESS
SHIELD
NET -
NET +
EOL
The shield of the data bus
EOL OFF
must be connected to the
electrical system ground
at only one point – usually
at one end of the bus as
Data Bus Shield:
Connect to the µ S¶ 
terminal
EOL EOL
Up to 50
devices total
EOL ON: For the EOL ON: For the
EC-BOS-8 as the EC-BOS-8 as the
first or last daisy first or last daisy
- - -
chanied device chanied device
EC-BOS-8 EC-BOS-8
:
For more information and detailed explanations on network topology
and wire length restrictions, refer to the Network Guide, which can be
downloaded from our website.

Device Addressing

The Network Guide provides extensive information and requirements to
implement a BACnet MS/TP network. It contains information about net-
work planning and MAC Address numbering schemes. It can be down-
loaded from the
The MAC Address must be set according to your network planning doc-
ument by setting the DIP switch located under the cover or when this
DIP switch is set to 0 (all off), the MAC address can be set by connect-
ing an Allure EC-Smart-Vue Series Communicating Sensor to the con-
troller as shown in Step 5 of Setting the Communicating Sensor Subnet
ID in the following section. An example of how to set the device's MAC
Address DIP switch is shown below.
MAC Address and
EOL DIP Switch
located under the
Figure 15:
Switch set to OFF
The address is the sum of the numbers set to ON. For example, if the
second (2), fifth (16), and seventh (64) DIP switches are set to ON, the
device MAC address is 82 (2 + 16 + 64). Only addresses from 1 to 127
are recommended to be used.
The controller must be power cycled after the MAC address DIP switch
has been changed. The device instance (DevID) is automatically con-
figured when setting the MAC Address to prevent network address con-
flict. The following formula is used to determine the device instance:
DevID = 364 * 1000 + MAC
For example:
MAC: 37
DevID = 364 * 1000 + 37 = 364037
The Device Instance can be changed once the controller has been
commissioned through the network management software interface.
Setting the Communicating Sensor
Subnet ID
shown
The default Subnet ID for an Allure EC-Smart-Vue Series Communicat-
ing Sensor is 1. To commission an ECB Series controller, the sensor's
Subnet ID must be set to 1. If the sensor's Subnet ID has been set to
another value (for example, the display flashes error code 1 with the
Bell icon when the sensor is connected to a controller for commission-
ing), change the Subnet ID to 1 as follows:
1. Connect an an Allure EC-Smart-Vue Series Communicating Sensor
S S S
+ + +
to the controller with a Cat 5e patch cable. Wait for the Bell icon and
the number 1 to flash on the display.
2. Press and hold the Menu button
password menu. 10000 is shown on the display.
www.distech-controls.com
NETWORK
ADDRESS
NETWORK
ADDRESS
EOL
cover
MAC Address DIP Switch Set to 82 and EOL DIP
website.
EOL
for 5 seconds to enter the
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