ETC Installation Guide
Occupancy/Vacancy Sensor
Echo Occupancy/Vacancy Sensor
Page 2 of 12
Electronic Theatre Controls, Inc.
Wire Specification
Sensors connect to the EchoConnect communication bus. EchoConnect is a
bidirectional protocol that uses one pair of wires (data + and data -) for both
data and power. ETC recommends using Belden 8471 (or approved equal)
Class II wire. The total combined length of an EchoConnect wire run (using
Belden 8471, or equal) may not exceed 1,640 feet (500m).
Installation Environment
Occupancy/Vacancy Sensors are intended for installation to a finished ceiling
surface, ceiling tile mounted, attached to a round fixture junction box or
single-gang RACO switch box.
The sensor operates in ambient temperatures of 0°C to 40°C, with a maximum
of 90% non-condensing humidity.
ETC recommends paying special attention to the installation environment:
• The sensor must have an unobstructed view of the room. Do not mount
behind or near tall cabinets, shelves, hanging light fixtures, etc.
• Do not install the sensor within eight feet from an HVAC airflow duct/
vent.
• Install the sensor where it cannot easily sense movement in areas
outside of the intended space, such as hallways, glass partitions, or
adjacent rooms. If the installation location cannot avoid these
Note:
All control wiring should be installed and terminated by a qualified
installer and should follow standard wiring installation practices.
Leave approximately 10 inches (254mm) of wiring in the back box for
connection to allow slack for future service needs.
Note:
ETC requires that all sensors be grounded. Pull an additional 14 AWG
(1.5mm
2
) wire for grounding when control wires are not installed in
grounded metal conduit.
Note:
- When using Category5 (or equivalent) cable on the EchoConnect
communication bus, please note the following:
- Cat5 wiring must be terminated using EchoConnect Cat5
Termination Kit and must be installed using a bus topology. Refer to
the installation guide that is provided with the Cat5 Termination Kit
(7186A1207) for information to terminate Cat5 wiring.
- Not all topologies are supported using Cat5; careful planning is
required to ensure the proper termination kits are available and the
wire is pulled appropriately.