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The Yokogawa ALR111-S00 is an RS-232C serial communication module (point-to-point, half-duplex, start-stop synchronization) supporting speeds from 1200 to 38400 bps.
The Yokogawa ALR111-S50 enables RS-232C serial communication between a Safety Control Station and subsystems such as sequencers (point-to-point, half-duplex). Supports Modbus slave communication.
The Yokogawa ALR111-S51 is a serial communication module (RS-232C / RS-422) for CENTUM DCS systems, providing data transfer between subsystems and Field Control Stations. Approx. 130 x 125.5 x 32.8 mm.
The Yokogawa ALR121-S00 is an RS-422/RS-485 serial communication module (point-to-point for RS-422, multipoint for RS-485, half-duplex, start-stop synchronization) supporting 1200 to 38400 bps.