Home > Guardmaster safety relays from Rockwell Automation simplify safety device selection

Guardmaster safety relays from Rockwell Automation simplify safety device selection

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article image Allen-Bradley Guardmaster safety relay

Leading global provider of industrial power, automation controls and information solutions, Rockwell Automation presents a new family of Allen-Bradley Guardmaster safety relays that can help machine builders and end users simplify safety device selection while reducing component inventory and lifecycle costs.

These safety relays are designed to meet new functional safety standards such as EN ISO 13849-1 or IEC/EN 62061.

The new line of Allen-Bradley Guardmaster safety relays includes basic units capable of supporting a range of safety devices in various applications such as single and multi-zone configurations.

Their patented, single-wire communication capability helps eliminate the need for dual-channel connection between relays, reducing installation time and effort as users can expand and cascade safety functions up to a SIL 3 rating using one single wire to connect devices.

Additionally, ‘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.

Guardmaster safety relays also incorporate a universal input feature that allows devices such as safety switches, emergency stop switches and safety mats to use the same set of input terminals on the relay.

This feature helps eliminate the need to employ a specific safety relay for a specific type of input device, helping simplify system design and reduce hardware costs.

The next-generation Guardmaster safety relay line also features dual-input modules, providing users with twice the functionality of a standard relay in a 22.5mm housing while reducing wiring for faster commissioning.

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

Guardmaster DI/DIS safety relays

  • Consolidates functionality of two safety relays into a single 22.5mm housing 
  • Electromechanical relay (DI) or solid-state (DIS) outputs 
  • ‘AND/OR’ logic between single wire safety input and standard inputs can be configured in a variety of safety functions for zoning and muting 
  • Configurable reset mode 
  • Additional outputs with expansion module, connected by a single wire safety connection 

Guardmaster SI safety relays
  • Suits simple safety applications using one dual or single-channel safety device 
  • Configurable reset mode 
  • 2 N.O. outputs and 1 PNP auxiliary output 
  • Additional outputs with expansion module, connected by a single wire safety connection 

Guardmaster CI safety relays
  • Similar in functionality to SI safety relays 
  • Terminals are arranged in a similar layout to legacy Allen-Bradley Guardmaster MSR safety relays and other brands of safety relays 
  • 3 N.O. outputs and 1 N.C. auxiliary output 
  • Configurable reset mode 
  • Additional outputs with expansion module, connected by a single wire safety connection 

Guardmaster EM/EMD safety relays
  • Users can add 4 N.C. instantaneous (EM) or delayed (EMD) outputs to a system 
  • Single-wire safe connection expands system without using any outputs of base module 
  • Self-monitoring outputs 
  • Time delay configured from 0s to 300s 
  • Timer functions include on delay, off delay and jogging 
Rockwell Automation’s range of safety products includes safety interlock switches, emergency stop and enabling switches, Prosafe trapped key interlock systems, presence-sensing safety devices, power control drives and contactors as well as Logix controllers. 

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