... ,0~15Km,ST/SC/FC(opt)Description: Cj-df series products are a type of multi-channel analog ... TTL digital signal interface: Ø Independent 1 ~ 4 channel input, 1~4 channel outputØ Input mode can be elected ... (optional).PairCj-af212chs analog signal fiber optic converters, 4-20mA, MM/SM, 0~15Km, ST/SC/FC ... signal digital signal fiber multiplexer, 1 ~ 4 chs analog signal, 1 ~ 4 chs digital signal, 1 ~ 2 chs ...