Radio Controlled Safety Module


The UH 6900 wireless safety system offers new options and solutions in the field of functional safety. The system offers safety-oriented, bidirectional wireless transmission of E-stop and control functions offering greater flexibility for the protection of hazardous areas up to Cat. 4 / PL e or SIL 3.


Pair mode

Radio controlled safety system UH 6900 in pair mode is for the transmission of safety inputs such as E-stop and conventional control functions and offers great flexibility for the protection of hazardous areas. The radio controlled safety system UH 6900 can be configured to easily and efficiently handle many different wireless functional safety challenges. Especially in areas where wiring would be impractical or impossible.


Group mode

The Radio controlled safety system UH 6900 in group mode consisting of one group controller and up to 255 group receivers for the safety related, wireless transmission of emergency stop and control functions, offers more flexibility in safeguarding hazardous areas. High availability, long range and safety are achieved by implementing the latest radio technologies. With the group controller, several receivers can be safely switched off via a unidirectional, safety-related radio link. Furthermore, the controller can exchange message, control and status information with a receiving device.


Safety rating: Up to SIL 3 Category 4 PL e

Protection rating: IP 40 for housing, IP 20 for terminals



EN ISO 13849-1

EN 62061

EN 61800-5-2

IEC 61508

EN 61511

Model Number Range Radio Frequency Safety Inputs Input Voltage
Safety Rating
UH 6900.03 (3 NO) Radio transmission up to 800m in open area. The distance can vary with the ambient conditions of the remote
control and the receiver aerial (roof construction, metal walls etc.)
64 channels 433 MHz or 12 channels 869 MHz 3 ( Dual channel) 24V DC Cat 4, PLe SIL 3
UH 6900.22 (2 NO + 1 NC)