This serial communication module enables reliable data exchange between Yokogawa controllers and external devices. The ALR111-S01 connects Centum VP and ProSafe-RS systems to serial peripherals like printers and HMIs. It handles asynchronous communication with configurable parameters for diverse applications. Control engineers select this module for its proven stability and ease of integration. Its single-slot form factor optimizes space utilization in Yokogawa racks.
Technical Specifications Summary
| Parameter | Specification |
|---|---|
| Communication Interface | RS-232-C serial, asynchronous mode |
| Data Rate | 300 bps to 19200 bps, software-selectable |
| Data Bits | 7 or 8 bits per character |
| Stop Bits | 1 or 2 stop bits |
| Parity Options | None, odd, even, mark, or space |
| Flow Control | RTS/CTS hardware and XON/XOFF software |
| Supported Protocols | ASCII, MODBUS RTU, custom protocols |
| Transmit Buffer | 256-byte FIFO for smooth data output |
| Receive Buffer | 256-byte FIFO for reliable input handling |
| Isolation | 1500 V RMS between serial port and logic |
| Connector Type | 9-pin D-sub female with locking screws |
| Maximum Cable Length | 15 meters at 19200 bps |
| Diagnostic LEDs | Power, TX, RX, and error status indicators |
| Dimensions (H x W x D) | 130 mm x 40 mm x 120 mm |
| Weight | 0.32 kg |
| Power Consumption | 3.2 W from +5 V DC backplane |
| Operating Temperature | -10 °C to +55 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 10% to 90% non-condensing |
Serial Communication Parameters and Configuration
The module supports a comprehensive range of serial communication settings. Users configure baud rates from 300 bps up to 19200 bps via software. The ALR111-S01 accommodates 7 or 8 data bits per character flexibly. It offers 1 or 2 stop bits and five parity options including mark and space. This extensive configurability ensures compatibility with virtually any serial device. All settings persist in non-volatile memory after power cycling. The module applies these parameters automatically at system startup.
Buffering and Flow Control Mechanisms
For efficient data handling, the module features 256-byte FIFO transmit and receive buffers. These buffers accommodate burst data transmissions without overrun errors. The ALR111-S01 supports both hardware and software flow control methods. RTS/CTS handshaking provides reliable pacing for high-speed connections. XON/XOFF software control works effectively with basic cable configurations. The module automatically manages buffer levels to prevent data loss. These mechanisms ensure seamless communication even with mismatched device speeds.
Protocol Support and Custom Application Integration
The module supports standard ASCII and MODBUS RTU protocols for common device interfaces. ASCII protocol suits simple terminals, printers, and diagnostic tools effectively. MODBUS RTU enables integration with industrial sensors, analyzers, and controllers. The ALR111-S01 also accommodates user-defined custom protocols as needed. Engineers program these protocols through the host controller’s software environment. A built-in loopback test mode facilitates installation verification and troubleshooting. This protocol flexibility adapts to both legacy and modern system requirements.
Physical Interface and Diagnostic Features
A rugged 9-pin D-sub female connector provides the physical RS-232 interface. This connector includes locking screws for vibration-resistant cable retention. The ALR111-S01 provides 1500 V RMS galvanic isolation for electrical protection. This isolation eliminates ground loops and protects against voltage surges. The module supports cable runs up to 15 meters at 19200 bps. Front-panel LEDs indicate power status, transmit activity, receive activity, and error conditions. These diagnostics simplify commissioning and ongoing maintenance significantly.
Mechanical Construction and Installation Process
The module occupies a single slot in the standard Yokogawa rack system. It measures 130 millimeters high, 40 millimeters wide, and 120 millimeters deep. The unit weighs 0.32 kilograms for straightforward handling during installation. Power consumption draws 3.2 watts from the +5 V DC backplane supply. Insertion requires no special tools or mounting hardware. The front-mounted connector provides easy access for cable connections. This compact design allows dense population of communication interfaces in the chassis.
Environmental Specifications and Long-Term Reliability
Industrial control rooms present moderate but constant environmental demands. The ALR111-S01 operates reliably across a -10 °C to +55 °C temperature range. Storage conditions extend from -40 °C to 85 °C for shipment and warehousing. Humidity tolerance covers 10% to 90% without condensation affecting performance. The module includes transient suppression on its serial port connection. This protection guards against electrostatic discharge and inductive spikes. High-quality components ensure dependable service throughout the system’s lifecycle.
Details
| Weight | 0.32 kg |
|---|---|
| Dimensions | 130 × 40 × 120 mm |
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