---
title: BLC400 LED Controller
slug: legacy-docs/blc400-led-controller
docTags: 
createdAt: 2025-03-11T07:10:52.795Z
---

The BLC400 is a lighting controller that functions as a USB peripheral for a BrightSign player. It allows you to trigger up to four LED devices in response to scripted events or interactive inputs.

The LED channels can be manipulated in [BrightAuthor\:connected](docId:0DqhXHKUnw5tezUcrS5pt) or the legacy [BrightAuthor Classic](docId\:lG8iLYdnIB0PL8tvxTKBo).

# Block Diagram

::Image[]{src="https://api.archbee.com/api/optimize/511c8QBH-VHiwWnyzIwUb/G9b-awxS487jD-DJvLaSg_blcdiagram1-edit-3.png" size="80" width="651" height="610" position="center" showCaption="false"}

# LED Channels

Each LED channel supports a 12V source and load and can source up to 1A. The channels also have over-current and short-circuit protection.

The LED channels use a 2-pin Molex connector (part no. 43650-0212, 3.0mm single-row right angle with header). The part number of the mating connector is 043645-0200.

# Power Supply

The power supply for the BLC400 is rated for 12V\@5A and uses a 4-pin Molex connector.

# USB

The BLC400 receives lighting-control instructions and transmits diagnostic data via the attached USB Type A (2.0) connector.