Posted to News on 2nd May 2025, 13:00
Safety controller stitches up machine safety control
A manufacturer of thread stitchers and industrial bookbinding machines looked for a Machine Safety Controller that was flexible and capable enough to manage the safety requirements of their various machines. ReeR Safety's low-cost, highly capable, MZERO units, proved to be perfect, being capable of 'stitching' together and managing all the safety devices installed along their production line.
Automatic thread stitchers and industrial bookbinding machines for the offset and digital printing industry tend to be clustered together to form an automated production line which collates and binds the book or document.
An example module consists of picker/collater machines connected to three stitching units. One or two operators run a system of up to eight modules.
Each module is equipped with a ReeR Safety MZERO safety controller that monitors four RFID safety sensors attached to the movable guards, plus an emergency button.
Each MZERO safety controller communicates with others using the module's local PLC via a coded digital output of the MZERO itself. The MZEROs communicate with each other, and with the local MZEROs being connected to the individual safety devices, there is less interconnection wiring or power supply cables to apply a safety solution to the entire line.
Diagnostics between MZERO and the module's local PLC is via a coded digital output of the MZERO. This allows the safety status of the module to be monitored accurately and effectively.
Using MZERO reduces the number of components and wiring, with one device meaning better wiring management, fewer power sources needed and no physical connections between the main unit and its expansion. MZERO also offers quick and easy installation, ideal for upgrading existing systems. It provides compatibility with a wide range of safety devices, including light curtains, emergency buttons and RFID switches.
Safety certifications up to SIL 3, SILCL 3, PL e, Category 4 ensure maximum reliability. And MZERO offers built-in simulation for safety logic control and verification, plus real-time monitoring with LED signalling and dedicated software.
MZERO is the perfect solution for those who need to manage several safety devices while having limitations in the control cabinet. It is especially advantageous for those who need to manage up to 20 inputs, offering a cheaper alternative with less wiring.
