ALF111-S00 S1 YOKOGAWA Fieldbus Module

ALF111-S00 S1 YOKOGAWA Fieldbus Communication Module

ALF111-S00 S1 YOKOGAWA Fieldbus Communication Module

Availability: 20 left in stock

YOKOGAWA ALF111-S00 S1 FOUNDATION Fieldbus Communication Module The YOKOGAWA ALF111-S00 S1, also cataloged as the ALF111-S00 FOUNDATION Fieldbus Communication Module,...

SKU: ALF111-S00 S1

Manufacturer: Yokogawa
Product No.: ALF111-S00 S1
Product Type: Communication Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 300g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

YOKOGAWA ALF111-S00 S1 FOUNDATION Fieldbus Communication Module

The YOKOGAWA ALF111-S00 S1, also cataloged as the ALF111-S00 FOUNDATION Fieldbus Communication Module, operates as a dedicated hardware component for deterministic digital fieldbus data exchange within CENTUM VP and CS 3000 Field Control Station (FCS) architectures. Mounted on compatible node units such as ANB10, ANB11, AFV30, AFV40, A2FV50, or A2FV70, the module interfaces host control software directly with field instruments operating on the H1 physical layer.

Hardware Specifications

Parameter	Specification
Model	ALF111-S00 S1
Brand	YOKOGAWA
Origin	Japan
Weight	0.3 kg
Dimensions	12.7 cm x 2.5 cm x 12.7 cm
Operating Temp	0 to 55 deg C
Power Consumption	Current consumption 0.5 A or less
Communication Interface	FOUNDATION Fieldbus H1 (low-speed voltage mode), 4 ports (1 segment per port)
Transmission Speed	31.25 kbps
Isolation Voltage	1500 V AC per minute (field-to-system)
Field Device Capacity	Up to 32 units per segment
Control I/O Capacity	Up to 48 points per segment

FOUNDATION Fieldbus H1 Network Integration

The hardware manages up to 4 independent fieldbus H1 segments, running at a deterministic transmission speed of 31.25 kbps. The module supports Link Active Scheduler (LAS) functionality and acts as a network clock master to execute scheduled cyclic transfers alongside acyclic field communications. Built-in bus terminators on each segment preserve signal wave shapes across fieldbus lines terminated via pressure clamp removable terminal blocks. Additionally, dual-redundant pair configurations inside a single node allow instant failover without dropping active H1 communications or disrupting cyclic schedule timing.

Frequently Asked Questions

Q: How does the module maintain scheduled communications during a host controller failover?

A: The onboard Link Active Scheduler (LAS) maintains the communication schedule across active H1 segments independently of the host controller processor, securing deterministic field loop updates.

Q: What physical segment termination is required when installing the module?

A: The module features built-in H1 segment terminators accessed via the pressure clamp terminal block assembly, eliminating the need for external bus termination resistors at the module interface.

Q: Does the unit support dual-redundant mounting configurations within the node chassis?

A: Two identical units installed in designated slot pairs provide full dual-redundant communication links across all 4 segments without interrupting field device data exchange.

Field Installation Guidelines

Verify that node backplane power remains turned off before inserting or unseating the module from ANB10/ANB11 or AFV chassis slots.
Connect segment signal lines using dedicated shielded twisted-pair cables designed specifically for 31.25 kbps H1 physical layer specifications.
Ground cable shields at a single point on the local grounding bar to prevent stray ground currents from inducing noise on the fieldbus segments.
Ensure pressure clamp terminal screws are torqued to specified field wiring standards to maintain consistent low-resistance electrical connections.
Confirm that built-in segment terminators match local topology requirements before commissioning active fieldbus segments.

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