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Yokogawa

Yokogawa ALF111-S50 Fieldbus Communication Module

SKU ALF111-S50

  • Part Number:

    ALF111-S50

  • Manufacturer:

    Yokogawa

  • Condition:

    Brand New & in Stock

  • Product Type:

    Fieldbus Communication Module

  • Origin:

    Japan

  • Shipping Detail:

    Fedex and UPS etc

  • Warranty:

    12 months

Frequently inquire Together

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Yokogawa ALF111-S50 FOUNDATION Fieldbus Communication Module

The Yokogawa ALF111-S50, also cataloged as the ALF111 FOUNDATION Fieldbus communication module, provides multi-segment H1 bus connectivity for distributed control systems, supporting deterministic communication and redundancy within CENTUM VP / ProSafe-RS architectures.

Hardware Specifications

Parameter Specification
Model ALF111-S50
Brand Yokogawa
Origin Japan
Weight ~0.4 kg
Dimensions 260 mm × 180 mm × 60 mm
Operating Temp 0 to +60 °C
Humidity 35% to 85% RH
Power Consumption ≤0.5 A
Core Performance 4 H1 ports, 31.25 kbps transmission speed

System Capacities

  • Connected Devices: Up to 32 devices per segment (depending on power and topology).
  • Control I/O Channels: Maximum 48 points per segment.
  • Faceplate Blocks: Up to 100 blocks per module, 250 per FCS.
  • Module Density: Up to 16 units per FCS, or 8 pairs in dual-redundant mode.

Functional Roles

  • Link Active Scheduler (LAS): Manages macrocycles and execution loops on the fieldbus.
  • Clock Master: Synchronizes system time across all connected instruments.
  • Redundancy Support: Dual-redundant operation prevents downtime during module swaps.

Frequently Asked Questions

Q: How many FOUNDATION Fieldbus segments can the ALF111-S50 support? A: Four independent H1 ports, each supporting one segment.

Q: What is the maximum number of devices per segment? A: Up to 32 devices, depending on segment power and configuration.

Q: Does the ALF111-S50 support redundancy? A: Yes, dual-redundant operation is supported within the same node unit.

Field Installation Guidelines

  • Mount the module securely in the designated rack slot.
  • Use pressure clamp terminals with built-in terminators for external connections.
  • Ensure shielded cabling for H1 segments, grounding at one end only.
  • Validate segment power and device count during commissioning.
  • Configure LAS and clock master roles via system software prior to startup.
Related Tags:
Fieldbus Communication Module Yokogawa
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We offer a standard one-year warranty for all new and original items.
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What is the warranty period?
We offer a standard one-year warranty for all new and original items.
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