TCY-MT-U
Temperature PID Controller
Doc: 70-00-0176 V1.1, 20100908
© Vector Controls GmbH, Switzerland
Page 8
Subject to alteration
0.2
0.5
1.0
Accuracy in Kelvin,
Temperature Input
0 50 100
T °C
Temperature Input
The TCY-MT-U includes an NTC-based passive temperature sensor. A
sensor of the same type can be connected as alternative control input or
remote control input. The TCY-MT2-U may use an additional input as
changeover input. The accuracy of the temperature input is shown in the
table to the right. Specified accuracy can only be guaranteed by using an
approved temperature sensor. For best results use Sxx-Tn10 sensors.
Options for input X1
These functions are activated by parameters
External controls input
The control input is provided by the external input. The internal input will not be
used.
Remote Enable
Opening the external temperature input will force the unit into the OFF operation
mode. The operation mode cannot be overridden by using the terminal. Connecting
the binary input to GND returns control of the operation mode to the terminal. This
function may be used as window contact to prevent loss of energy.
Toggle of Standby and
Comfort operation modes
Standby and Comfort modes are controlled through an external contact by connecting
the external temperature input to ground
Activation Delay:
Defines the delay the binary contact has to be open before
standby mode is activated.
This function may be used together with key card switches for hotels or motion
detectors for offices.
Auto change over instructions for input X2 (TCY-MT2 only):
There are several ways to switch a 2-pipe system from heating to cooling. The temperature of the supply media or the
outside temperature may be measured. The controller detects the mode automatically. If heating limit is above cooling
limit, supply media mode is selected. If heating limit is below cooling limit, outdoor mode applies.
Heating and cooling may be as well changed by an open contact switched to GND. Note: all ground levels of involved
controllers must be the same in case more than one controller is switched.
Supply media
Set auto change over limit heating above the change over limit cooling but below the
temperature of the heating media. For example 25°C (77F).
Set auto change over limit cooling above the temperature of the cooling media. For
example 18°C (64F).
Outside temperature
Set auto change over limit heating at the temperature where heating should start. For
example if outside temperature is below 15°C (59F).
Set auto change over limit cooling at the temperature where cooling should start. For
example at 25°C (77F).
Open Contact: heating active
while contact is closed
Auto change over limit heating = 25°C (77F)
Auto change over limit cooling = 15°C (59F)
Open Contact: cooling active
while contact is closed
Auto change over limit heating = 15°C (59F)
Auto change over limit cooling = 25°C (77F)
