Reliable Data Exchange and Network Protocol Management
This communication module enables seamless data exchange between the control system and external networks. It supports multiple industrial protocols for versatile connectivity with field devices and host systems. The Yokogawa AMN33 provides two independent communication ports for redundant network configurations. Each port supports RS-232, RS-422, or RS-485 serial communication standards. The module handles data rates up to 115.2 kbps with automatic baud rate detection. It manages protocol conversion between the backplane bus and the field network.
Physical Dimensions and Mounting Specifications
The unit measures 120 mm in height, 60 mm in width, and 130 mm in depth. It weighs approximately 0.55 kg with all mounting hardware and connectors included. The AMN33 attaches securely onto a standard 35 mm DIN rail within the control cabinet. Its aluminum housing provides effective shielding against electromagnetic interference. This lightweight design facilitates easy installation and maintenance activities.
Interface Connectivity and Electrical Requirements
Front-facing D-sub connectors provide convenient access for both communication ports. The Yokogawa AMN33 draws its operating power from the 5 V DC backplane supply. It interfaces with the host processor through a dedicated serial communication link. A DIP switch array allows users to configure port settings and module addresses. LED indicators display communication activity and error conditions for each port. These indicators significantly aid network troubleshooting and diagnostics.
Internal Architecture and Energy Storage Elements
The PCB contains two independent UART controllers and a protocol processing microcontroller. Each communication channel includes isolation transformers for galvanic separation from the network. The AMN33 stores protocol configuration and network parameters in onboard EEPROM. A 220 µF capacitor provides local energy storage for transient voltage protection. The module incorporates surge suppression devices on each communication line. This protection ensures reliable operation in electrically noisy industrial environments.
| Parameter | Specification |
|---|---|
| Model | AMN33 |
| Type | Communication Module |
| Communication Ports | 2 independent, isolated |
| Serial Standards | RS-232, RS-422, RS-485 (selectable) |
| Data Rate | Up to 115.2 kbps, auto-detection |
| Protocols | Modbus RTU, proprietary (configurable) |
| Isolation | 1500 V AC (port to logic) |
| Supply Voltage | 5 V DC (backplane) |
| Dimensions (H×W×D) | 120 × 60 × 130 mm |
| Weight | 0.55 kg |
| Operating Temperature | 0 to +55 °C |
| Storage Temperature | –20 to +70 °C |
| Interface | Serial backplane bus |
| Field Connectors | 2 × D-sub (9-pin) |
| Address Setting | DIP switch (4-position) |
| Energy Storage | 220 µF capacitor |
| Line Protection | Surge suppression devices |
Recommended Installation Practices
Position the Yokogawa AMN33 away from high-voltage cables and variable-frequency drives. Use twisted-pair shielded cables for all serial communication wiring. Terminate the communication cable shield at the control panel ground point only. Configure the port settings using the DIP switches before system power-up. Verify communication with connected devices using diagnostic test tools. Schedule periodic checks of cable connections and LED status indicators.
Details
| Weight | 0.55 kg |
|---|---|
| Dimensions | 120 × 60 × 130 mm |
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