Black Box Multichannel RS-232<->Current-Loop Converter serial adapter - 16 ports

The Multichannel RS-232< - >Current Loop Converter matches 16 RS-232 ports with 16 Current Loop circuits for conversion both ways. This efficient converter is the most compact solution for a large site. You can use just one unit instead of 16 single-channel converters. Just turn a switch to choose your operating mode. In active mode, the converter supplies the 20-mA Current Loop power; in passive mode, 20-mA Current Loop power is provided by the attached active device. Choose from half- or full-duplex with just the flip of a switch.