AES and SRB range safety monitoring modules serve for the secure evalution of switching signals. The signals can emanate from mechnical position switches, safety switches, solenoid interlocks or magnetic safety sensors on sliding, hinged or removable guard doors.

SRB range output expanders serve for the secure evalution of Emergency Stop circuits to Stop Category 0 and 1 to EN 60204-1. Versions without delay fulfil Stop Category 0 to EN 60204-1 and serve to provide additional contacts.

Safety monitoring modules of the SRB series are designed to monitor all normal safety guard with electromechanical principle of operation such as emergency stop command devices, interlocking equipment with and without interlock, safety mats, etc. Because of the built-in current and voltage limitation, they are suitable for safeguarding optoelectronic safety guards and safety magnetic switches as well.

AZR 31 S1 and FWS range standstill monitors serve for fail-safe registration of machine standstill and control of safety solenoid interlocks on sliding, hinged or removable guard doors. Depending on the external circuits arrangements, the protection system can be secured up to the requirements of Control Category 4 to EN ISO 13849-1 in combination with an AES or AZR range safety monitoring module.

The AZS fail-safe delay timer serves for the secure measurement of a preset time. The enabling signal for the control system, which for example makes it possible to open a guard device, is only given when the present time has elapsed. AZS range fail-safe delay timers are often used where dangerous situation can occur after a machine or plant has been switched off, e.g. because of running-down movements. Depending on the external circuit arrangements, the protection system can be secured up to the requirements of Control Category 3 to EN ISO 13849-1 in combination with an AES or AZR range safety monitoring module.

AES-E range input expander are suitable for the protection of machines and plants with up to four guard devices in combination with an AES guard door monitor.

These monitoring modules have been developed for special applications. Areas of application range from the monitoring of tactile and optoelectronic safety equipment to that of twin valves on press control systems. The various areas of application for which the individual safety monitoring modules are designed are listed below.

Safety controllers