MAC2*B Yokogawa CENTUM VP Datasheet & Technical Manual

MAC2*B Yokogawa IBI M4VO Board Vnet/IP Module

MAC2*B Yokogawa IBI M4VO Board Vnet/IP Module

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Yokogawa MAC2*B Communication Processor Module The Yokogawa MAC2*B, also cataloged as the MAC2 Communication Processor Module, operates as a dedicated...

رمز المنتج: MAC2*B

Manufacturer: Yokogawa
Product No.: MAC2*B
Product Type: Communication Processor Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 350g
Shipping port: Xiamen
Warranty: 12 months

وصف التقييمات

Yokogawa MAC2*B Communication Processor Module

The Yokogawa MAC2*B, also cataloged as the MAC2 Communication Processor Module, operates as a dedicated hardware component for multipoint analog signal coordination and bus synchronization within Vnet/IP networks. The board functions as a direct interface bridging field control units (FCUs) with the high-speed system bus architecture, executing physical-layer data frame arbitration and deterministic transmission of process loops.

Hardware Specifications

Parameter	Specification
Model	MAC2*B
Brand	Yokogawa
Origin	Japan
Weight	0.35 kg (1.10 lbs)
Dimensions	120 mm x 25 mm x 130 mm
Operating Temp	0 to 60 deg C
Power Consumption	~6.0 W (calculated from 5 VDC, ~1.2 A)
Subassembly Board	IBI M4VO Board
System Compatibility	CENTUM VP, CS 3000
Communication Protocol	Vnet/IP (100 Mbps Ethernet-based)
Electrical Isolation	1500 VAC (system-to-bus, 1 min)
Humidity Range	5 to 95% RH (non-condensing)

Process Control & Vnet/IP Loop Protocol

The hardware architecture uses the 100 Mbps Vnet/IP communication standard to transmit multipoint analog data frames back to the central processor units. To secure the system backplane against field-side electrical interference, the module implements channel-to-channel isolation networks alongside a 1500 VAC system-to-bus barrier. The onboard logic interprets variable data packets from smart field instruments, utilizing dedicated data transfer links to maintain synchronous updates. Integrated diagnostic routines continuously poll loop health, outputting physical failure codes directly to front-panel LED indicators to track real-time network stability and circuit integrity.

Frequently Asked Questions

Q: How does the MAC2*B handle communication link cutovers within dual-redundant configurations?

A: The board continuously interfaces with a parallel standby module over the dual-redundant Vnet/IP architecture. If the primary hardware registers a frame dropout or internal diagnostic error, the logic executes a bumpless switchover to the secondary card within defined network cycle limits, preventing loss of process control values.

Q: Can the board be extracted from the FCU rack slot during active process operations?

A: Online removal is permissible only if the module operates in a fully initialized, dual-redundant pair and the secondary partner card is reporting normal operating parameters. Extracting a simplex (non-redundant) module under power breaks the field control unit communication loop, freezing all downstream analog variables.

Field Installation Guidelines

Backplane Interface Alignment: Align the structural borders of the board with the designated slots within the field control unit chassis. Apply linear force until the rear bus connector completely seats against the backplane pins, then tighten all retention mechanisms to avoid loose connections from physical industrial vibration.
Signal Shield Isolation: Connect the shields of the twisted-pair communication cables directly to the main cabinet instrument ground bar. Verify that the shield layer remains ungrounded at the field junction box to suppress ground potential loops that induce noise on the analog signal channels.
Enclosure Thermal Management: Mount the rack hardware with at least 50 mm of vertical clearance from wire ducts and adjacent cards. This spacing maintains natural convective airflow across the IBI M4VO board component surfaces, preventing heat build-up beyond the rated 60 deg C upper limit.

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