CNT-SVX17G-EN 11
Inputs and Outputs
Binary Input
Each Tracer® VV550/VV551 controller provides one binary input. The binary input can be
configured as occupancy or generic (see Table 5) or not used. The input associates 0 Vac
with ope
n contacts and 24 Vac with closed contacts. It is activated by a dry contact switch
closure.
Table 5. Binary input description and wiring
Binary input Terminals Label Terminal
function
Occupancy or
Generic
TB4-1, TB4-2 BI 1 Input
On the Tracer VV550 factory-installed controller, the binary input configuration is set up
at the factory. The controller is correctly set up for each factory-supplied binary input end
device.
On the Tracer VV551 field-installed controller t
he bina
ry input has to be configured with
the Rover service tool for the connected end device. The binary input is looking for a dry
contact switch closure.
Occupancy Binary Input
The occupancy binary input can be configured as NO or NC. Occupied is the normal state.
It is also the initial state at power-up and after a reset. Unoccupied is the other state. If
the binary input is configured as generic, the default occupancy mode is occupied.
Generic Binary Input
The generic binary input can be configured as NO or NC. Normal state is inactive and is
also the initial state at power-up and after a reset. Active is the other state.
Not Used Input
When no device is connected to the input, configure the controller input as not used.
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