Yokogawa MIF4*A FOUNDATION Fieldbus H1 Communication Module

Availability: 10 left in stock

Yokogawa MIF4*A FOUNDATION Fieldbus H1 Communication Module The Yokogawa MIF4*A serves as the primary MIF4 FOUNDATION Fieldbus H1 Communication Module...

SKU: MIF4*A

Manufacturer: Yokogawa
Product No.: MIF4*A
Product Type: FOUNDATION Fieldbus Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 400g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa MIF4*A FOUNDATION Fieldbus H1 Communication Module

The Yokogawa MIF4*A serves as the primary MIF4 FOUNDATION Fieldbus H1 Communication Module utilized to execute multi-channel network arbitration across Field Control Unit (FCU) platforms. Configured for low-speed voltage mode data transmission, the hardware manages physical connectivity between smart transmitters, valve positioners, and the central controller, routing deterministic signal traffic across multiple active field bus loops.

Hardware Specifications

Parameter	Specification
Model	MIF4*A
Brand	Yokogawa
Origin	Japan
Weight	0.40 kg
Dimensions	Standard node module sizing
Operating Temp	0 to 60 deg C
Power Consumption	Max 2.5 W (calculated from 5 VDC, ≤0.5 A current consumption)
Interface Type	FOUNDATION Fieldbus H1 (low-speed voltage mode)
Ports	4 ports (1 segment per port)
Transmission Speed	31.25 kbps
Maximum Devices	32 units per segment (including the MIF4*A)
Isolation	1500 VAC (field-to-system, channel-to-channel, 1 min)
Bus Connection	Removable pressure clamp terminal block with switchable internal terminators

FOUNDATION Fieldbus Connectivity & Segment Configuration

The interface module establishes communication tracks utilizing the FOUNDATION Fieldbus H1 protocol operating at a transmission speed of 31.25 kbps. To shield the processor logic from field-induced electrical disturbances, the hardware implements robust channel-to-channel isolation networks alongside field-to-system barriers rated at 1500 VAC. The card executes the role of the Link Active Scheduler (LAS) and system clock master, enforcing deterministic loop synchronization and scheduling cyclic data transfers for up to 32 field instruments per segment. Integrated physical switches allow deployment of internal terminators directly on the module board, eliminating the requirement for external termination hardware on short-run loops.

Frequently Asked Questions

Q: How does the MIF4*A manage the Link Active Scheduler (LAS) role during a dual-redundant module failure?

A: In a dual-redundant pairing, both cards monitor the fieldbus segment concurrently. The primary online module operates as the active LAS node, maintaining the schedule for all 48 control I/O channels per segment; if the primary hardware reports an error or encounters a bus drop, the backup module takes over the LAS token seamlessly without disrupting segment traffic.

Q: Can the removable pressure clamp terminal blocks be disconnected while the fieldbus segments are under power?

A: Unplugging the terminal block under power disconnects all 32 devices on that specific segment immediately, forcing associated control loops into their configured fail-safe positions. While the card supports hot-swap architecture at the backplane interface, active field wiring blocks must only be detached during isolated loop maintenance periods.

Field Installation Guidelines

Chassis Slot Seating: Slide the module into the designated slot on the field control unit or ESB/ER bus node unit along the rack guides. Push the module inward until the rear pins connect with the system backplane, and engage the locking clips to secure the device against low-frequency industrial vibration.
Segment Termination Setup: Verify the position of the built-in terminator switch before activating the field loop. If the MIF4*A sits at the physical end of the H1 trunk line, enable the internal terminator; if an external terminator exists at the field junction box, disable the onboard module switch to prevent double termination.
Field Line Shielding: Connect all fieldbus cable shields together and terminate them at a single point on the master cabinet instrument ground bar. Ensure the outer shield layers remain isolated at the transmitter housings to prevent parallel ground paths from introducing digital frame errors.

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