Allen-Bradley Guardmaster SensaGuard range

The Allen-Bradley Guardmaster SensaGuard range delivers a cost-effective, machine guarding solution for industry. The units provide secure safety switching, diagnostics and monitoring in one compact package. Combining the cutting-edge technology of RFID coding with an M23 Safety Distribution block, SensaGuard simplifies the integration of multiple sensors.

RFID coding provides an additional level of security, allowing a SensaGuard switch and actuator to be paired with a specific code. This enhances safety by reducing the possibility of other actuators being used to bypass the switch.

The switch is paired with an actuator on initial power-up and can be locked to this unit immediately. If some flexibility is required, the switch can be re-paired to another actuator up to eight times. After the 8th time, it is locked to the last-paired actuator. At any time during the pairing process, the switch can be locked to a specific actuator permanently.

When multiple sensors are installed, the use of the Allen-Bradley M23 Safety Distribution block will simplify integration of the SensaGuard family of products. Available with either four or eight ports, the M23 Safety Distribution block facilitates the direct local connection of M12, 8-pin SensaGuard safety products.

The Safety Distribution block provides the ability to connect up to eight SensaGuards to meet Cat4/SIL3/PLe, with an individual auxiliary contact from each device going back to the control panel. This provides specific diagnostic information for each door or device to the control system. The LEDs on the distribution block provide additional local diagnostic information for troubleshooting. Shorting plugs for unused ports, variable length 19-pin patchcords and 8-pin cordsets are available to provide full connectivity and circuit safety.

Suitable for guarding equipment with part- or full-body access, SensaGuard switches are particularly suitable for applications where multiple access doors must be monitored up to safety Category 4/Safety Integrity Level 3 (SIL3)/Performance Level e (PLe).

The SensaGuard RFID coding and connectivity with the M23 Safety Distribution block offer a cost-effective solution that is suited to a wide range of industrial safety applications. Following certain installation requirements, the M23 Safety Distribution block also allows connectivity of other devices via dry contacts to products such as e-stop or OSSD transistor outputs for light curtain applications.