# TCC Control GUI

URL: https://irs.systems/en/docs/ltt/documentation/ltt-gui-manual/lttgui/hwcontrol/tcc-control-gui

You can access the temperature chamber contact control panel through the main window menu **Hardware > TCC**.

![HW\_TCC\_Control](/docs/assets/ltt/assets/hw-tcc-control.png)

With [simulated TCC driver](../../Configuration/ModuleConfiguration/TCC/) you can set a TCC value, otherwise the panel is read only.

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The temperature chamber contact is a digital input for the LTT.

The input is usually set from the climatic chamber, which usually accompanies each LTT.

The TCC consists of **8 input channels** (bits).

You need the TCC input for determining which [operation mode](../Dialogs/F10testparameterconfiguration/) of your [testplan](../../teststand/operationmodes/) should execute.

> The standard TCC module is a NI PCI-6503 24 channel digital in/out card. The 24 channels are grouped by 3 ports á 8 lines.