MX-Series multiplexers have 4-20mA, 0-10Vdc, contact closures and RS-232/485 I/O module selections. The base unit connects directly to the fiberoptic cable. Power is supplied through an external 24-VDC power supply. Each base unit has a duplex optical port configured for use with 1300 nm wavelength and single- or multi-mode optical fiber. No programming is required.