PLCs, Power Supplies & Others

This communication module provides serial connectivity for Yokogawa Centum VP and ProSafe-RS systems. The ALR111 interfaces with external devices and network equipment through its RS-232-C port. It handles data exchange between the control system and peripheral devices like printers and operator consoles. System integrators choose this module for its reliable asynchronous communication capabilities. Its compact single-slot design fits easily into existing Yokogawa rack configurations.

Technical Specifications Summary

Serial Communication and Interface Capabilities

The module implements a standard RS-232-C serial interface for versatile device connectivity. It supports baud rates from 300 bps up to 19.2 kbps. Users select the appropriate speed and data format through software configuration. The ALR111 handles 7 or 8 data bits with 1 or 2 stop bits. It supports four parity options: none, odd, even, and mark parity. Hardware flow control uses RTS/CTS handshaking for reliable data transfer. Software flow control with XON/XOFF provides additional flexibility. This comprehensive parameter suite suits most industrial serial applications.

Data Buffering and Protocol Support

For smooth data flow, the module includes 16-byte FIFO buffers for transmit and receive. These buffers prevent data overrun during high-speed communications. The ALR111 supports ASCII and MODBUS RTU protocols out of the box. Users can also implement custom protocols through the host controller’s programming. A diagnostic loopback mode aids in testing and troubleshooting connections. The module handles both polled and interrupt-driven data transfer modes. This versatility accommodates various device types and application requirements.

Hardware and Software Flow Control

The module offers both hardware and software flow control mechanisms for data integrity. Hardware flow control uses the RTS and CTS signals on the RS-232 port. This method provides reliable pacing for high-speed data transfer applications. Software flow control with XON and XOFF characters suits simpler cabling setups. The ALR111 automatically handles flow control handshaking without user intervention. Users configure the flow control method through the configuration software. This flexibility ensures compatibility with diverse peripheral equipment.

Physical Interface and Installation

The module provides a standard 9-pin D-sub connector for serial device attachment. This connector follows the standard RS-232-C pinout convention for interoperability. The ALR111 includes 1500 V RMS galvanic isolation on the serial port. This isolation protects the host controller from ground loops and voltage surges. The module fits into the Yokogawa single-slot chassis position. LED indicators on the front panel display power, transmit, receive, and error status. These indicators help technicians verify proper operation during commissioning.

Mechanical Construction and Environmental Tolerance

The module features a lightweight design for straightforward installation and handling. It measures 130 millimeters high, 40 millimeters wide, and 120 millimeters deep. The unit weighs only 0.3 kilograms for easy insertion and removal. Power consumption reaches 3 watts from the +5 V DC backplane supply. Operating temperature spans -10 °C to +55 °C for indoor control room use. Storage conditions range from -40 °C to 85 °C for logistics protection. Humidity tolerance covers 10% to 90% without condensation affecting circuits. These specifications ensure reliable operation in typical industrial environments.

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