Description

Yokogawa AMN33 Nest for Communication Modules

The Yokogawa AMN33-S2, also cataloged as the AMN33 Nest for Communication Modules, operates as a dedicated hardware component for managing communication module integration within CENTUM CS 1000, CS 3000, and VP distributed control systems. It provides a robust mechanical and electrical platform for modular signal routing and subsystem interconnection.

HardwareSpecifications

Parameter	Specification
ModelBrand	Yokogawa AMN33
Origin	Japan
Weight	1.2 kg (unloaded)
Dimensions	127 mm × 152 mm × 254 mm
OperatingTemp	0 to 50 degC (operating), -40 to 85 degC (storage)
PowerConsumption	3.5-5.0 W (nest only, modules excluded)
SupportedModules	ACM12, communication subsystem modules
InputType	Voltage, Current, RTD
InputVoltageRange	±10 V to ±100 V
InputCurrentRange	4-20 mA
RTDTypes	Pt100, Ni120, Cu50
Accuracy	±0.05% of full scale
Resolution	16 bits
SamplingRate	100 samples/sec
ElectricalIsolation	>100 MΩ at 500 VDC
HumidityLimits	5-95% RH, non-condensing
MechanicalShock	Up to 10 G operational shock
Vibration	1.5 G continuous, 10-150 Hz

ProcessControl-DCSConnectivityFeatures

• Supports 4-20 mA HART loop protocol for analog signal integration.
• Provides channel-to-channel isolation to prevent signal interference between communication modules.
• Compatible with FOUNDATION Fieldbus and Profibus PA connectivity for subsystem integration.
• Cold junction compensation (CJc) is supported for RTD measurements to maintain thermal accuracy.

FrequentlyAskedQuestions

Q: Does the AMN33 support hot-swap of communication modules?
A: The unit requires modules to be powered down prior to installation or removal; it does not support hot-swap of internal communication modules.

Q: What is the maximum internal bus current available for installed modules?
A: The internal backplane supplies up to 5.0 W per nest overhead; modules should be accounted for separately to avoid exceeding the bus capacity.

Q: Is firmware on the communication modules updated via the AMN33?
A: Firmware updates are managed through the host DCS interface; the AMN33 itself does not perform firmware flashing.

FieldInstallationGuidelines

• Mount the AMN33 on standard DIN or panel fixtures ensuring the chassis is properly grounded.
• Maintain at least 50 mm spacing from heat-generating devices to avoid thermal accumulation.
• Route signal cables using shielded conduits; connect shields to ground at a single point to prevent ground loops.
• Verify orientation of modules and secure locking mechanisms to avoid vibration-induced disconnection.
• Avoid crossing power and signal lines in tight proximity to reduce electromagnetic interference.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems