AMN33 | Yokogawa Nest For Communication Modules

Product Overview

The Yokogawa AMN33 is an I/O Module Nest for Communication Modules in the CENTUM CS/VP RIO system. It provides mounting and backplane connectivity for serial and fieldbus communication modules such as ACM11 (RS-232), ACM12 (RS-422/485), and ACF11 (Fieldbus). The AMN33 enables the DCS to interface with third-party devices, smart instruments, and subsystems via standard industrial communication protocols.

Key Specifications

• Model: AMN33
• Type: I/O Module Nest for Communication Modules
• Compatible Modules: ACM11 (RS-232), ACM12 (RS-422/485), ACF11 (Fieldbus)
• Power Supply: 5.0 VDC from node interface unit
• Mounting: Node Interface Unit or I/O Expansion Rack

Environmental Specifications

• Operating Temperature: 0°C to +50°C
• Relative Humidity: 5% to 95% RH (non-condensing)
• Storage Temperature: -20°C to +70°C

Installation Guide

1. Mount the AMN33 in the node interface unit or expansion rack.
2. Install communication modules (ACM11/12, ACF11) into the nest slots.
3. Connect serial or fieldbus cables to the module ports.
4. Configure communication parameters (baud rate, parity, protocol) via CENTUM VP engineering software.
5. Test communication with connected devices using Yokogawa diagnostic tools.

FAQ

• Q: What communication protocols are supported?
  A: RS-232, RS-422/485, and Foundation Fieldbus via respective ACM/ACF modules.
• Q: Can multiple communication modules be installed in one AMN33?
  A: Yes, depending on nest slot capacity; verify node interface unit specifications for maximum module count.
• Q: Is Ethernet communication supported?
  A: Ethernet modules (ACM71) are typically mounted in AMN51 nests, not AMN33; verify module compatibility.
• Q: What cable types are recommended?
  A: Shielded twisted pair for RS-485; certified fieldbus cable for Foundation Fieldbus applications.

Selection Tips

• Use AMN33 when integrating serial devices (barcode scanners, weigh scales) or fieldbus instruments into CENTUM RIO.
• Verify the communication protocol and electrical interface (RS-232 vs. RS-485) of third-party devices before selecting ACM modules.
• For Ethernet communication, consider AMN51 with ACM71 modules instead.