The expander module is designed for connecting up to 8 read/write heads: BIS L-3_ _ or BIS M-3_ _ can be selected using the rotary switch, depending on the processor (L or M). The read/write heads are selected electronically and are therefore not subject to wear. The process for selecting the read head can be monitored via feedback signals. 2 × 4 control signals help to select the desired read/write head.
A maximum of 2 expanders can be connected in series. The new expander module is a low-cost, economically scalable solution for extending your current system by up to 32 read/write heads using only one processor.