RB0408 – 8-Output Relay Board for MTPADPBK-EH-SA Keypads and Readers

The RB0408 is an 8-output expansion relay board, designed to be used in conjunction with the MTPADP-EH-SA series proximity keypads and readers.
Through the RS-485 connection, it allows you to significantly expand the control capacity, bringing the total number of available relays to nine (one on the keypad and eight on the additional module).

Each output can be independently assigned to specific users, allowing flexible management of doors, gates, elevators, lights, or other electrical devices.

⚠️ Important note: Each user can operate only one relay output at a time.
It is not possible to control multiple relays simultaneously by the same user.

The module has 4 digital inputs and 8 relay outputs of 2 A / 150 VAC, with DIN-rail mounting, for a tidy and safe installation in the electrical cabinet.

Main technical features:

• Number of relays: 8 outputs (2 A / 150 VAC)

• Digital Inputs: 4 (0V/3.3V)

• Communication protocol: RS-485

• Maximum number of modules: 4 relay boards per controller (32 total outputs)

• Number of controllers per site: unlimited (in lift mode)

• Access management: control floors or devices via Access Levels

• PCB Size: 102.8 × 86.8 mm

• DIN package size: 107 × 90 × 61 mm

• Mounting: Standard DIN rail

• Supply voltage: 12 – 24 V AC/DC (via controller or dedicated power supply)

Typical Applications:

• Multiple door and gate control

• Management of elevator floors with dedicated relays

• Activating lights or electrical devices from the keyboard

• Integration into security systems or multi-level access

Direct compatibility:

• MTPADPBK-EH-SA