AFG84D-H4123 YOKOGAWA Field Control Unit

YOKOGAWA AFG84D-H4123 CENTUM VP Field Control Unit

YOKOGAWA AFG84D-H4123 CENTUM VP Field Control Unit

Availability: 99 left in stock

YOKOGAWA AFG84D-H4123 Field Control Unit Configured for high-availability process control in CENTUM VP and CS 3000 systems, the YOKOGAWA AFG84D-H4123...

SKU: AFG84D-H4123

Manufacturer: Yokogawa
Product No.: AFG84D-H4123
Product Type: Field Control Units
Product Origin: Japan
Payment:T/T, Western Union
Weight: 800g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

YOKOGAWA AFG84D-H4123 Field Control Unit

Configured for high-availability process control in CENTUM VP and CS 3000 systems, the YOKOGAWA AFG84D-H4123 (AFG84D Field Control Unit) provides direct physical and logical execution of control algorithms through dual-redundant processing pathways.

Hardware Specifications

Parameter	Specification
Model	AFG84D-H4123
Brand	YOKOGAWA
Origin	Japan
Weight	0.8 kg
Dimensions	482.6 mm x 310 mm x 265 mm
Operating Temp	0 deg C to 50 deg C
Power Consumption	250 VA
Redundancy	Duplex (CPU, Power, Bus)
Failover Time	< 10 ms
Isolation	>= 500 VDC channel-to-channel

DCS Process Control and Connectivity

The AFG84D-H4123 architecture utilizes a 4-20 mA HART loop protocol to facilitate bidirectional communication between field instrumentation and the Vnet/IP control network. The module ensures deterministic loop execution by isolating field-side signals through 500 VDC channel-to-channel isolation barriers. When integrated into the control hierarchy, the unit manages synchronization between redundant CPU pairs, maintaining consistent scan cycles and I/O image updates across the primary and standby processors.

Frequently Asked Questions

Q: Does the AFG84D-H4123 support live insertion and removal of power supply modules?

A: Yes. The power supply units are designed for hot-swapping under normal load conditions. The internal circuitry limits inrush current to 30 A for a duration of 50 ms to prevent voltage sag on the common backplane during installation.

Q: How is the failover logic synchronized during a CPU fault?

A: The system utilizes a dedicated high-speed bus to mirror memory states between the primary and standby CPUs. Upon detection of a processor hang or hardware fault, the secondary CPU assumes bus mastership within a failover window of less than 10 ms, ensuring the control process remains uninterrupted.

Field Installation Guidelines

Rack Mounting: Secure the unit within a standard 19-inch industrial rack using all four chassis mounting points. Ensure that internal cooling fans remain unobstructed to maintain the operational temperature range of 0 deg C to 50 deg C.
Shielding: Terminate all analog signal cable shields to the cabinet ground bus bar at the entry point. Avoid routing high-voltage power cables in the same wireway as the Vnet/IP communication bus to prevent electromagnetic interference.
Grounding: Verify that the chassis frame establishes a low-resistance connection to the station earth ground. This prevents potential drift in the 4-20 mA measurement accuracy caused by ground loops or transient common-mode voltages.

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.