The YOKOGAWA AMN31 S1, also cataloged as the AMN31 Terminal I/O Nest, operates as a dedicated hardware component for multi-channel field wiring interface and module mounting within CENTUM CS 3000 and CENTUM VP platforms.
Hardware Specifications
Parameter
Specification
Model
AMN31 S1
Brand
YOKOGAWA
Origin
Japan
Weight
0.9 kg (2 lbs 0.0 oz)
Dimensions
12.7 cm x 15.2 cm x 25.4 cm
Operating Temp
-20 to 60 deg C (-4 to 140 deg F)
Power Consumption
100 W maximum
Operating Voltage
24 VDC
Slot Capacity
31 module slots
Protection Rating
NEMA 4X / IEC IP66
Process Control and Channel Isolation Properties
4-20 mA HART Loop Compatibility: Integrates direct power distribution and signal routing traces supporting standard 4-20 mA HART transmitters and control valve positioners across all 31 terminal slots.
Galvanic Noise Isolation: Incorporates localized backplane isolation barriers between field wiring terminations and system bus channels to suppress common-mode noise interferences.
Cold Junction Compensation Integration: Supports direct wiring from field temperature transmitters via integrated compensation circuits on field terminal blocks.
Frequently Asked Questions
Q: What is the maximum power dissipation rating supported by the AMN31 S1 nest assembly?
A: The internal 24 VDC power distribution plane is rated to supply and dissipate up to 100 W total across all populated module slots.
Q: Can modules be inserted or removed from any of the 31 slots while the power bus is energized?
A: Yes, online hot-swapping of individual terminal I/O cards is supported, provided proper ESD grounding guidelines are strictly followed during module insertion and removal.
Q: What environmental protection rating does the AMN31 S1 nest frame hold?
A: The unit meets NEMA 4X and IEC IP66 standards for dust-tight and water-resistant physical enclosure protection.
Field Installation Guidelines
Mount the nest frame vertically into the system cabinet rack using all mounting hole locations to ensure physical stability.
Connect the system earth ground wire to the primary grounding terminal before energizing the 24 VDC power supply lines.
Route field I/O cables through separate cable raceways separated from high-voltage AC cables by a minimum distance of 300 mm.
Ensure all field cable shields are terminated at a single system ground bar to prevent ground loop currents across the backplane.
