The Marantec Multi‑Bit 131 Wall Transmitter is a compact, wall-mounted controller for Marantec garage doors. It provides reliable, secure wireless operation with dual buttons for multi-function control. Ideal for indoor installation in homes or commercial garages.

The Marantec Command 131 is a:

• Wireless wall-mounted transmitter (not a wired switch)
• Works as a fixed indoor remote control
• Sends commands via Marantec Multi-Bit radio system
• Used for:
  • Garage doors
  • Industrial doors
  • Gate automation systems

 It behaves like a “wall remote” rather than a physical wired button.

Radio System (Multi-Bit)

From official Marantec documentation:

• Multi-Bit RF technology
• 48-bit encrypted signal (~70 million code combinations)
• Unidirectional communication (transmitter → receiver only)
• Each command is sent as a secure coded RF signal

Frequencies (model dependent)

• 433.92 MHz version
• 868.3 MHz version

Must match receiver frequency exactly.

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Functional Description

How it works

1. User presses wall button (Channel 1 or 2)
2. Internal transmitter encodes Multi-Bit signal
3. RF signal is sent to receiver
4. Receiver triggers door controller input

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Key Features

• 2 programmable channels (buttons)
• Each button can be assigned to:
  • Different doors
  • Open/close/stop functions
• LED confirmation indicator (red LED)
• Can copy transmitter signals via programming cable (service function)

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Electrical / Hardware Specs

Power

• 1 × CR2032 lithium battery (3V)

Operating conditions

• Temperature: −20°C to +60°C
• Battery-powered (no wiring required)

Physical design

• Size: 80 × 80 × 27 mm
• Wall-mounted housing
• Integrated antenna
• Push-button surface interface

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Channels & Control Logic

• 2 independent channels
• Each channel can be assigned to:
  • 1 door
  • 1 function (e.g. light, gate, second operator)

Output type

• Wireless RF command only
• No relay or physical switching inside unit

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Programming & Pairing

Pairing method

• Learned into a Multi-Bit receiver (CS300, CS320, plug-in receivers, etc.)
• Uses “learn mode” on controller

Copy function

• Some versions allow:
  • Direct cloning of another transmitter via cable contacts

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Build & Installation

Mounting

• Screw-mounted wall installation
• Indoor rated (IP20)

Materials

• ABS plastic housing
• Compact push-button front panel

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Compatibility

Works with:

• Marantec Multi-Bit receivers:
  • CS300 / CS320 controllers
  • Digital plug-in receivers
  • External Multi-Bit RF modules

Compatible remotes:

• Digital 302 / 304 / 306 series
• Other Multi-Bit transmitters on same frequency

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Important Engineering Notes

Not a wired switch

Even though it’s “wall mounted”:

• It is still a radio transmitter
• No direct electrical connection to controller

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System compatibility rule

Must match:

• Same Multi-Bit protocol
• Same frequency (433 or 868 MHz)

Otherwise:

• It will NOT work even if brand is Marantec

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Security model

• Fixed-code encrypted system (not rolling code)
• ~70 million possible codes
• Secure but older than newer bi·linked systems

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Technical Summary

• Type: Wireless wall transmitter
• Channels: 2
• Frequency: 433 MHz or 868 MHz
• Protocol: Multi-Bit (48-bit encryption)
• Power: CR2032 battery
• Range: RF line-of-sight (typ. 30–100 m depending on environment)
• Protection: IP20 (indoor use)
• Size: 80 × 80 × 27 mm

(The Company reserves the right to amend product specifications and information without notice.)