· PLC
Two electricians one week to wire 2 x 40 = 80 hr
No junction boxes
No conduit
No wire markers
No wire terminals
Startup less than 1/2 day for two electricians 2 x 4 = 8 hr
· Category 3 safety system 2 x 4 = 8 hr
Eliminate conduit
Significant labor reduction
Less installation hardware
Less panel space
Total 96 hr
Pearson Packaging compared wiring time for two mechanically identical R235 machines, one with a hardwired safety system and the other with a distributed safety I/O network.