TCY3-T0121R Engineering Manual
Doc: 70-000002 V1.0, 20101115 © Vector Controls GmbH, Switzerland Page 16
Subject to alteration
Binary Outputs
If OP11 is in the OFF position, DO1 and DO2 may be used as binary outputs. They may be used for binary sequences or
other special functions:
Additional functions oft he binary output:
Dehumidifying
(only for 4-pipe systems)
The maximum value is taken of both direct acting sequences of LP1 and LP2 (Cooling and
dehumidifying). Cooling will start to operate if the humidity gets too high, even if there is
no cooling need, thus the heating will be forced to come into play, which in turn
dehumidifies the air.
Operation State (On if
operation state is ON)
The output is ON if either comfort or standby mode are active. In energy hold off mode
(EHO) the output is off.
Operation State with switch
off delay 60s
The output is ON if either comfort or standby mode are active. In energy hold off mode
(EHO) the output is off with a switch off delay of 60s. This is required for fan supported
heating or cooling coils with mold protection.
Output while demand on
any output, switch off delay
60s
The output is ON if demand exists on any other output. The output switches off with a
fixed delay of 60s if there is no more demand. This function is usefull for fan supported
heating or cooling devices.
Indication of the fan symbol
By enabling this function, the fan symbol is shown on the display whenever DO1 is active.
Floating Outputs
Enabling OP11 changes DO1 and DO2 into a floating output for a PID loop. In this case the running time of the actuator
needs to be specified. Running time is defined as the time required for the actuator to run from fully open to fully closed
or vice versa. Actuators with a fixed running time are recommended. Once fully open or fully closed the running time for
the actuator is extended for a full run time cycle. This will allow the actuator position to be synchronized in case it has
been moved during off time or an actuator with variable running time was used.
Switching difference on floating output: Use the Switching difference parameter to reduce the switching frequency of the
actuator. The actuator will only move, if the difference to the current actuator position is larger than this parameter.
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