Dold Launches RE 6900 Wireless Safety System for Industrial Cells

Dold has introduced the RE 6900 wireless safety system to support emergency stop and enabling functions in industrial automation environments where operator mobility is essential. Part of the SAFEMASTER W product family, the system combines a wireless handheld device with radio-controlled safety modules while meeting Category 4/PL e and SIL 3 requirements. Designed for setup, maintenance, and service work on large machines and robotic cells, the RE 6900 keeps critical safety functions within reach without relying on fixed or wired devices.

The RE 6900 keeps safety-related enabling and emergency stop functions at arm’s length. Image used courtesy of Dold

Dold is addressing these requirements with the RE 6900 wireless safety system, part of its SAFEMASTER W product family. The system enables safety-related shutdowns and allows functions to be performed wirelessly, while meeting safety requirements up to Category 4/PL e or SIL 3. It is designed for use in applications where both mobility and functional safety are required during operation, setup, or maintenance.

Wireless Safety Functions for Industrial Use

The RE 6900 system is built around a wireless handheld transmitter that can be configured as either a wireless emergency stop or a wireless enabling switch. Both versions communicate with a radio-controlled safety module to execute safety-related shutdowns or enable commands.

Dold’s RE 6900 with emergency stop. Image used courtesy of Dold

The RE 6900 handheld device allows operators to trigger a safety shutdown from a distance or from within the cell, which is particularly useful in large machines, conveyor systems, robotic systems, or logistics environments where reaching a fixed emergency stop may take too long. The safety-enabling switch configuration supports safety-oriented operation during setup or maintenance and was designed for robotic cells.

The enabling switch uses a three-stage mechanism. Only the defined center position allows machine movement. Releasing the switch or pressing it fully interrupts motion and triggers a safety shutdown by monitoring unintended movements, aligning with common requirements for safety enabling devices within robotic or automated cells.

RE 6900’s Wireless Communication and Safety Monitoring

The RE 6900 uses two-way wireless communication between the handheld device and the safety module, so the system continuously checks that the connection remains intact. If that link is interrupted, the system defaults to a safe shutdown. It also monitors movement and shock to detect if the device is dropped or handled unexpectedly.

User authentication is supported via RFID, enabling access control at the safety device level. This can help limit operation to authorized personnel during service or setup tasks. On the control side, Dold uses the UH 6900 wireless safety modules to manage both control tasks and safety shutdowns. These modules support different operating modes, such as pair mode and group mode, so they can be set up for a single transmitter or shared across multiple transmitters, depending on how the system is used.

Accessories and System Components

The RE 6900 family includes several components that can be combined to match specific use cases:

• RE 6900 with emergency stop, intended for wireless shutdown of machines and systems
• RE 6900 with an enabling switch, designed for setup, maintenance, and service work in robotic and automated equipment
• UH 6900 wireless safety module, responsible for processing wireless safety signals
• UH 6900 MF and UH 6900 GC/GR variants, supporting different pairing and group communication modes.

Modern Robotic cells can vary in size, so it’s important to have safety measures as close to personnel as possible. Image used courtesy of Adobe Stock

Application Areas

The RE 6900 is aimed squarely at industrial automation tasks where operators need to move around but still keep safety functions close at hand. Common uses include service and setup work on robot cells, emergency stop functions for large machines or production lines, and safety control in transport and logistics areas. Giving integrators a wireless option removes trailing cables and gives operators more freedom to work without sacrificing direct control over safety functions.

With the RE 6900, Dold adds a wireless option to its SAFEMASTER W safety lineup that doesn’t compromise on certification. The system supports both emergency stop and enabling functions up to Cat. 4/PL e and SIL 3, and can be configured with matching wireless safety modules. That makes it a practical choice for installations where mobility is part of the job, but safety requirements remain strict.