LTS LTH-DCU Secure Door Control Module with RS-485 & Wiegand Interface

LTS LTH-DCU Secure Door Control Module

The LTS LTH-DCU is a compact secure door control module designed to sit on the protected side of a doorway, acting as a trusted go-between for your access control panel, IP intercom, or 2-wire intercom system and the physical door hardware. Rather than wiring the electric lock, exit button, and door contact directly to an exposed reader, this module keeps that wiring hidden and protected, so tampering with a reader or keypad on the public side of the door cannot be used to force it open. It is a practical accessory for LTS Platinum and PRO-X intercom and access control installations across offices, warehouses, retail premises, and multi-tenant buildings.

Key Features

• RS-485 communication for a stable, long-distance link back to the main access controller or intercom panel
• Dedicated door release relay to drive electric strikes, maglocks, or other lock hardware
• Request-to-exit (REX) input for connecting a standard push-to-exit button
• Wiegand input that supports external card, fob, or PIN readers for entry credentials
• Door contact input to monitor whether the door is open, closed, or held open too long
• Seven onboard LED indicators for quick visual diagnostics during installation and troubleshooting
• Compact enclosure measuring approximately 115mm (W) x 48mm (H) x 25mm (D), suited to tight recesses or door frames
• Simple 12VDC power input, compatible with standard security power supplies already used in most installs

Where It Fits in Your Access Control Setup

The LTH-DCU is intended for installers building or expanding LTS IP intercom or 2-wire intercom access control systems who need a secure, tamper-resistant way to bridge the intercom or controller to real-world door hardware. Because it isolates the lock relay, REX input, and door contact from the front-facing reader, it is particularly useful on doors where the reader is mounted in a publicly accessible spot, such as building entrances, loading docks, server rooms, and stairwell doors in commercial or multi-residential properties.

What's in the Box

• 1x LTS Secure Door Control Module (LTH-DCU)
• Mounting hardware
• Printed or downloadable installation guide

Frequently Asked Questions

Does the LTH-DCU need its own power supply?
Yes, it runs on 12VDC, so it should be powered from a suitable regulated power supply as part of your intercom or access control installation.

Can I use my own card reader with this module?
Yes, the built-in Wiegand input is designed to accept standard Wiegand card, fob, or keypad readers.

Is this module compatible with LTS 2-wire intercom systems as well as IP systems?
Yes, it is listed as an accessory for both LTS IP intercom and LTS 2-wire intercom product lines.

What does the door contact input do?
It lets the system monitor the physical open/closed state of the door, which is useful for door-held-open and forced-entry alerts.

Additional Resources

• Installation guide