Up to 4 switches can be connected to each PDP20 module. PDP20 interface modules also offer a high level of decentralisation due to the ability to cascade modules. Each module features 4 dual-channel inputs and 2 solid-state safe outputs, 1 diagnostic solid state output and 2 test pulsed outputs. To cascade multiple PDP20 modules, the OSSDs of one are fed into one of one of the dual-channel inputs of the next PDP20 module.
Costing less than a standard safety relay, PDP20 interface modules makes a compact and economical solution for series connections, which ultimately find their way back to a final safety relay or other safety controller.
Where you require the functionality of ‘nesting’ safety guard inputs (including light curtains, RFID coded switches, standard interlocks, E-stops, resets etc.) without the availability of localised cabinets to house PDP20 modules, Pilz already offers an IP67-rated system PDP67 F 4 Code and PDP 67 F 8DI ION.