A PLC Splitter takes one optical signal and splits it into many outputs. Lower ratios work for fewer users. FBT splitters may survive in. In modern automation systems, engineers often need to share one encoder's signal with multiple PLCs, HMIs, or motion controllers. Whether for redundancy, monitoring, or synchronized control, the question remains the same: how to split an encoder signal safely without losing accuracy or damaging. Can I connect two PLC analog inputs to the same 4-20mA sensor? What is the maximum loop resistance for a 4-20mA transmitter? Do I need isolation for voltage sensors? Can I use a simple voltage divider to tap a 0-10V signal? What is the risk of tapping pulse signals to two PLCs? Adding a secondary.