Dahua DHI-DEE1010B-S2 - RS485 Second Door Extension Module

Dahua DHI-DEE1010B-S2 — RS485 Second Door Extension Module

The Dahua DHI-DEE1010B-S2 is an access control extension module that adds RS485 communication and a safe relay output, allowing a compatible Dahua access controller to manage a second door. It is not a standalone controller or reader — it works alongside existing Dahua access control hardware.

Who is it for?

This extension module suits installers expanding an existing single-door Dahua access controller to handle a second door without installing a whole separate control panel. It connects to a compatible Dahua access controller via RS485 and provides the relay output needed to drive a second door's lock. On its own it cannot control access — it requires a host controller already fitted at the site.

Key specification

What you will need

• A compatible Dahua access controller for this module to connect to
• A card reader or credential reader wired to the second door, if one is not already fitted
• An electric lock and power supply for the second door
• RS485 cabling between the controller and this extension module

Frequently asked questions

Does the DHI-DEE1010B-S2 work on its own?

No. It is an extension module and must be connected to a compatible Dahua access controller — it does not manage doors independently.

How does it communicate with the controller?

It uses an RS485 interface to link to the host Dahua access controller.

What does the safe relay do?

The built-in safe relay provides the switched output used to drive the second door's electric lock.

Browse the full Dahua range, explore our Access control products, or Contact us on 01902 902251 to check compatibility. You can also visit our Wolverhampton trade counter to see stock in person.