AMM31 Yokogawa Magnetic Flow Converter

AMM31 Yokogawa Magnetic Flow Converter | New & Original Stock

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Yokogawa AMM31 ADMAG Series Magnetic Flow Converter Configured for converting signals from magnetic flow tubes into standardized outputs within process...

SKU: AMM31

Manufacturer: Yokogawa
Product No.: AMM31
Product Type: Magnetic Flow Converters
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 200g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa AMM31 ADMAG Series Magnetic Flow Converter

Configured for converting signals from magnetic flow tubes into standardized outputs within process automation networks, the Yokogawa AMM31, also cataloged as the AMM31 Magnetic Flow Converter, provides direct physical/electrical execution.

Hardware Specifications

Parameter	Specification
Model	AMM31
Brand	Yokogawa
Origin	Japan
Weight	0.2 kg (6.1 oz)
Dimensions	12.7 cm x 2.5 cm x 20.3 cm
Operating Temp	Standard industrial range
Power Consumption	Configured per excitation protocol requirements
Excitation Method	Dual frequency (up to 400 mm tube) / Pulsed DC (500 mm and larger)
Response Time	0.1 s
Current Output	4-20 mA DC (max. 1000 Ohm load)
Pulse Output	Transistor contact, 30 VDC (OFF), 200 mA (ON), 0.0001-1000 pps
Alarm Output	Transistor contact, 30 VDC (OFF), 200 mA (ON)
Status Output	2 x Transistor contacts, 30 VDC (OFF), 200 mA (ON)
Communication Protocols	BRAIN / HART
Cable Length Limit	Up to 2 km via PVC-sheathed control cables
Enclosure Protection	NEMA 4 equivalent
Case Material	Aluminum alloy with polyurethane corrosion-resistant coating
Mounting Options	2-inch pipe, panel, or surface mount
Grounding Resistance	100 Ohm maximum (10 Ohm maximum when utilizing surge arrestor function)
Data Storage	Non-volatile EEPROM (no backup battery required)

Process Control & DCS Instrumentation Properties

The module utilizes a 4-20 mA HART loop protocol alongside the proprietary BRAIN communication layer to interface directly with distributed control system (DCS) architectures. To preserve signal integrity across long-distance topologies up to 2 km, the hardware maintains independent channel-to-channel isolation parameters between the primary flow tube excitation circuit and the analog/pulse output terminals. Signal processing functions leverage dual-frequency excitation techniques to suppress slurry noise and fluid hydrodynamic variations, executing real-time digital filtering without introducing phase lag into the 4-20 mA control loop.

Frequently Asked Questions

Q: What are the specific load resistance boundaries for establishing digital communication with the AMM31?

A: For BRAIN protocol communication, the loop must maintain a load resistance between 250 Ohm and 600 Ohm. For HART protocol configuration, the required loop resistance range is 230 Ohm and 600 Ohm.

Q: How does the unit store calibration and configuration constants during a total power disruption?

A: The device writes all operational parameters, flow tube constants, and multi-range settings directly to an internal EEPROM. This non-volatile storage method eliminates the need for lithium backup batteries and prevents data corruption during prolonged power outages.

Field Installation Guidelines

Grounding Infrastructure: Connect the module to an independent instrument ground. The grounding resistance must not exceed 100 Ohm for standard operations. If the hardware variant includes the integrated surge arrestor function, the grounding resistance must be maintained at 10 Ohm or less to safely dissipate transient overvoltages.
Signal Cable Routing: Field wiring between the magnetic flow tube and the AMM31 converter must use dedicated PVC-sheathed control cables. Do not route these signal cables in parallel or within the same conduit as high-voltage AC power lines to avoid electromagnetic cross-talk. The maximum physical cable length must never exceed the 2 km specification.
Enclosure Maintenance: To preserve the NEMA 4 equivalent environmental seal, verify that all conduit entries use appropriate weather-tight seals or glands. Ensure the aluminum alloy housing cover is fully threaded and seated against its gasket to inhibit moisture ingress in high-humidity processing zones.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.