AKB331-M020 | Yokogawa | AKB331 Signal Cable

Description

The Yokogawa AKB331‑M020, also cataloged as the AKB331 signal cable, operates as a 50‑pin to 50‑pin transmission cable used for interfacing AKB‑series terminal boards within Yokogawa control architectures. The M020 suffix designates a fixed cable length of 20 m, supporting stable analog/digital signal transfer across distributed panel locations.

Suffix Breakdown & Model Matrix

• AKB331: Base signal‑cable family used for terminal‑board interconnection.
• M020: Indicates a 20 m cable length.
• No additional functional segmentation is defined for this model.

Hardware Specifications

• Part Number: AKB331‑M020
• Brand: Yokogawa
• Series: AKB331 Cable Family
• Product Type: AKB331 Signal Cable (50‑pin to 50‑pin)
• Cable Length: 20 m
• Connector Type: 50‑pin to 50‑pin ribbon/round cable (per AKB331 standard)
• Construction: Shielded signal‑grade cable for control‑system interconnection
• Shipping Weight: 1.5 kg
• Country of Manufacture: Not specified (Yokogawa global production)
• Availability: In stock

4‑20 mA HART Loop Protocol & Channel‑to‑Channel Isolation

• The AKB331 cable supports Yokogawa DCS wiring practices where 4‑20 mA and HART‑enabled channels require low‑noise transmission paths.
• Shielding reduces interference between adjacent channels, maintaining channel‑to‑channel isolation when used with corresponding terminal boards.
• Cable geometry minimizes impedance variation across long‑distance runs such as the 20 m M020 variant.
• Proper grounding of the shield at a single point prevents ground‑loop formation in mixed‑signal environments.

Frequently Asked Questions (FAQ)

• Q: Can the AKB331‑M020 be used interchangeably with other AKB cable lengths? A: Yes. Length is the only functional difference; connector pinout remains identical across AKB331 variants.
• Q: Does the cable support mixed analog and digital signals? A: Yes. The AKB331 family is designed for multi‑signal routing, provided shield bonding and grounding rules are followed.
• Q: Is the cable hot‑swappable? A: No. All AKB‑series cables must be connected or removed only when the associated I/O modules are powered down.

Field Installation Guidelines

• Maintain shield bonding at a single grounding point to avoid noise coupling into analog channels.
• Route the cable away from high‑voltage or high‑current conductors to prevent induced interference.
• Ensure both 50‑pin connectors are fully seated and latched before powering the system.
• Apply strain relief at both ends to prevent connector fatigue during cabinet vibration.
• Avoid tight bending radii to maintain internal conductor integrity over the 20 m length.