> ## Knowledge Base Index
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# Teltonika TRB141 Installation

# Teltonika TRB141 installation

> This document is intended for professional installers only, not end users.


## Sim Card
The device ships without a SIM card pre-installed. You will need to insert the included SIM card before use.
| ![](https://storage.crisp.chat/users/helpdesk/website/-/a/4/f/3/a4f3bb8f4a123800/image_7qx21f.png =629xauto) | ![](https://storage.crisp.chat/users/helpdesk/website/-/a/4/f/3/a4f3bb8f4a123800/image_clgacm.png =620xauto) |
| ---- |
| ![](https://storage.crisp.chat/users/helpdesk/website/-/a/4/f/3/a4f3bb8f4a123800/image_1pw8k28.png =626xauto) |  |


## Wiring and installation
While using the Teltonika device with Unloc offers extensive configuration options, we recommend maintaining the standard configuration whenever possible.

![](https://storage.crisp.chat/users/helpdesk/website/-/a/4/f/3/a4f3bb8f4a123800/image_1as7i8l.png)
![](https://storage.crisp.chat/users/helpdesk/website/-/a/4/f/3/a4f3bb8f4a123800/image_obw2t4.png)The default configuration is as follows
**NC1 / C1 / NO1:** Lock control relay (Max 1A @ 30VDC). If your lock requires higher ratings, you must use an external relay.
**NC2 / C2 / NO2:** Auxiliary relay for door automation (Default). Note: This relay cannot control a second lock.

**DI1:** Request-to-exit button. Triggers the opening sequence and logs an egress event when connected to ground (⏚).
**DI2:** Door monitor (optional). Used for door status logging and reducing unlock duration after opening. Should connect to ground (⏚) when door is closed.

Installer-accessible configuration is currently in development. For now, all configuration changes must be made by Unloc support.

Two additional I/O pins are available in the power connector and can be configured as either inputs or outputs. Contact us for a consultation if you require custom configuration.


## Control center (Installer tool)
Before you begin you will need to be delegated access to the clients control center. See [I need access to the installer tool](https://help.unloc.app/en/article/i-need-access-to-the-installer-tool-j882zs/)

Find the correct project on https://my.unloc.app/installer and choose the "Install new lock" option then choose Teltonika and follow the instructions provided in the wizard


If the lock should include doorbell see "How to add a doorbell"