Allen-Bradley Guardmaster safety relays

Rockwell Automation has launched a new generation of Allen-Bradley Guardmaster safety relays that includes basic units capable of supporting a range of safety devices in various applications such as single- and multizone configurations.

The relay line features a single-wire communication capability that helps eliminate the need for dual-channel connection between relays. Users can expand and cascade safety functions up to a SIL 3 rating using a single wire to connect devices. This provides a reduction in installation time and effort. In addition, AND/OR logic can be set via a rotary switch on the front of the relay, yielding a variety of configurations including regional and global e-stop architectures.

A universal input feature allows devices to use the same set of input terminals on the relay. This helps eliminate the need to employ a specific safety relay for a specific type of input device.

A single TÃœV-approved rotary switch with internal redundancy eliminates the need for double switches, helping to speed configuration while addressing multiple functions such as reset modes and time delays.

The new range of Guardmaster safety relays includes: Guardmaster DI/DIS that consolidates the functionality of two safety relays into a single 22.5 mm housing; Guardmaster SI, suitable for simple safety applications using one dual- or single-channel safety device; Guardmaster CI, similar to SI but with terminals arranged in a similar layout to legacy Allen-Bradley Guardmaster MSR safety relays; and Guardmaster EM/EMD that allows users to add 4 NC instantaneous (EM) or delayed (EMD) outputs to a system.