Spider enables connecting four 1-Wire probes (temperature, humidity) or contacts to the RS-485 bus. Up to six Spiders (24 sensors) can be connected to a single Poseidon 2250. Spider simplifies large-scale installations, RS-485 uses CAT5 cabling with RJ45 jacks and achieves the longest distances. Typical applications include connecting temperature probes, humidity probes or door contacts for several refrigerators in the middle of a RS-485 bus. Another example are monitoring clusters in refrigerators in supermarkets. One CAT5 cable connects a cluster of 4 freezers, each freezer contains a 1-Wire FLAT sensor connected to Spider. Individual clusters can be also daisy-chained.