4 port RS-422/485 serial board 4 RS-422/485 ports ISA bus Supports ADDC (Automatic Data Direction Control) intelligence Available with optical isolation and surge protection as options RS-485 data control: auto or by RTS Built-in terminators
The CI-134 series is designed for RS-422/485 industrial communication. It supports 4 independent RS-422/485 ports which can control up to 132 devices in a multidrop environment.
To ease the 2-wire RS-485 half-duplex control, an Automatic Data Direction Control intelligence is built on each CI-134 board, eliminating the need of software interference. Hence, the Windows applications can manage the RS-485 port without extra code to control the half-duplex protocol.
To meet the demand of high reliability in industrial environment, an optical isolation option (2000V) and surge protection (2000V) are also available in this series.