> For the complete documentation index, see [llms.txt](https://docs.irs.systems/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.irs.systems/ltt/documentation/ltt-gui-manual/configuration/moduleconfiguration/tcc.md).

# TCC Module

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. This card is also used for the [UPS](/ltt/documentation/ltt-gui-manual/configuration/moduleconfiguration/ups.md). For the TCC port 0 / lines 0 - 7 is used. For the UPS port 1 / line 0 is used.

A temperature chamber contact module has the following mandatory standard parameters:

| Parameter    | Meaning                                                                                                                             | Examples                |
| ------------ | ----------------------------------------------------------------------------------------------------------------------------------- | ----------------------- |
| Resource     | The connection information needed to connect to this device.                                                                        | cDAQ1Mod1/port0/line0:7 |
| Inverted     | Indicated whether the digital inputs are inverter or not. The standard LTT TCC hardware has inverted inputs.                        | true / false            |
| LastSimValue | This parameter is used by the simulation driver to store the last simulated value. You change this value via the TCC control panel. | 1                       |

{% hint style="info" %}
You can access a TCC control panel through [GUI](/ltt/documentation/ltt-gui-manual/lttgui/hwcontrol/tcc-control-gui.md) and also via [TestStand](/ltt/documentation/ltt-gui-manual/teststand/hardware-control.md).
{% endhint %}


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