This serial communication module provides reliable asynchronous data exchange for Yokogawa control systems. The ALR111-S00 connects Centum VP and ProSafe-RS controllers to external serial devices seamlessly. It handles printer outputs, operator console links, and third-party instrument communications effectively. System engineers choose this module for its robust performance and simple configuration. Its single-slot design conserves valuable rack space in the Yokogawa chassis.
Technical Specifications Summary
| Parameter | Specification |
|---|---|
| Communication Interface | RS-232-C serial (asynchronous) |
| Data Rate | 300 to 19200 bps (software selectable) |
| Data Bits | 7 or 8 bits per character |
| Stop Bits | 1 or 2 stop bits |
| Parity | None, odd, even, mark, or space |
| Flow Control | RTS/CTS (hardware) and XON/XOFF (software) |
| Protocol Support | ASCII, MODBUS RTU, user-defined |
| Transmit Buffer | 256-byte FIFO |
| Receive Buffer | 256-byte FIFO |
| Isolation Voltage | 1500 V RMS between serial and logic |
| Connector Type | 9-pin D-sub (female) with locking screws |
| Max Cable Length | 15 meters at 19200 bps |
| Indicators | Power, TX, RX, and error LEDs |
| 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 Interface and Data Formats
The module features a robust RS-232-C serial port for connecting peripheral devices. It supports standard data rates from 300 bps to 19200 bps. Users configure baud rate, data bits, and stop bits through software settings. The ALR111-S00 handles 7 or 8 data bits with 1 or 2 stop bits. It offers five parity options including none, odd, even, mark, and space. This extensive configuration set accommodates nearly all serial communication protocols. The module automatically applies the selected format for error-free data transmission.
Buffering and Data Flow Management
The module includes 256-byte FIFO buffers for both transmit and receive operations. These large buffers prevent data loss during high-speed communication bursts. The ALR111-S00 supports both hardware and software flow control mechanisms. RTS/CTS hardware handshaking provides reliable pacing for fast data transfer. XON/XOFF software control works with simpler cable configurations effectively. Users can enable or disable these flow control options as needed. The module manages data flow automatically to prevent buffer overrun conditions.
Protocol Support and Customization
The module supports ASCII and MODBUS RTU protocols for standard device interfaces. ASCII protocol suits simple printer and terminal communications conveniently. MODBUS RTU enables integration with industrial instruments and controllers. The ALR111-S00 also supports user-defined protocols for specialized applications. Engineers program these custom protocols through the host controller interface. The module includes a loopback test mode for verification and troubleshooting. This protocol flexibility adapts to diverse system architecture requirements.
Physical Interface and Connectivity
A standard 9-pin D-sub female connector provides the physical serial interface. This connector includes locking screws for reliable cable retention. The ALR111-S00 provides 1500 V RMS galvanic isolation for noise immunity. This isolation protects the control system from ground loops and surges. The module supports cable lengths up to 15 meters at maximum baud rate. LED indicators display power, transmit, receive, and error conditions clearly. These features facilitate straightforward installation and quick status verification.
Mechanical Design and Installation
The module occupies a single slot in the Yokogawa rack system. It measures 130 millimeters high, 40 millimeters wide, and 120 millimeters deep. The unit weighs only 0.32 kilograms for convenient handling. Power consumption draws 3.2 watts from the +5 V DC backplane supply. The module inserts directly into the chassis without any special tools. A front-mounted connector provides easy access for serial cable attachment. The compact design allows dense packing of communication modules.
Environmental Specifications and Operational Reliability
Control room environments require stable operation under varied thermal conditions. The ALR111-S00 operates reliably from -10 °C to +55 °C ambient temperature. Storage conditions extend from -40 °C to 85 °C for shipping protection. Humidity tolerance covers 10% to 90% without condensation affecting circuits. The module includes transient suppression on its serial port connection. This protection guards against electrostatic discharge and voltage spikes. Quality components and construction ensure extended operational lifetime.
Details
| Weight | 0.32 kg |
|---|---|
| Dimensions | 130 × 40 × 120 mm |
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