AKB331-M020/SDV144 Yokogawa Digital Input Module

Digital I/O Assemblies | Yokogawa AKB331-M020/SDV144

Digital I/O Assemblies | Yokogawa AKB331-M020/SDV144

Availability: 20 left in stock

Yokogawa AKB331-M020/SDV144 Digital Input Assembly The Yokogawa AKB331-M020/SDV144, also cataloged as the AKB331/SDV144 Digital I/O Assembly, operates as a dedicated...

SKU: AKB331-M020/SDV144

Manufacturer: Yokogawa
Product No.: AKB331-M020/SDV144
Product Type: Digital Input Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 400g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa AKB331-M020/SDV144 Digital Input Assembly

The Yokogawa AKB331-M020/SDV144, also cataloged as the AKB331/SDV144 Digital I/O Assembly, operates as a dedicated hardware component for 24 VDC logic signal interconnect and digital input processing within Yokogawa CENTUM CS3000 and ProSafe-RS platforms.

Suffix Breakdown & Model Matrix

Option Code / Suffix	Structural Specification	Functional Description
AKB331	Base Model Code	Direct Signal Cable Interface Assembly
-M020	Cable Length Option	20 Meter Length Specification
/SDV144	Module Integration	16-Channel 24 VDC Digital Input Module

Hardware Specifications

Parameter	Specification
Model	AKB331-M020/SDV144
Brand	Yokogawa
Origin	Japan
Weight	1.5 kg (Cable) / 0.4 kg (Module assembly)
Dimensions	Cable outer diameter 6.8 mm / Module 130 mm x 100 mm x 30 mm
Operating Temp	0 to +55 deg C (Assembly) / -20 to +80 deg C (Cable)
Power Consumption	5 VDC via backplane bus
Signal Level	24 VDC logic signals
Insulation Resistance	100 M ohm minimum at 500 VDC
Voltage Rating	250 VAC
Connector Type	50-pin to 50-pin interface
Channel Isolation	Collective optical isolation
Communication Protocol	Vnet/IP via FCS backplane

4-20 mA HART Loop Protocol and Channel-to-Channel Isolation

The assembly functions within high-density control cabinets alongside analog instrumentation, maintaining collective isolation to prevent ground potential differences from affecting internal logic. The 50-pin shielded cabling architecture provides high noise immunity for digital input signals operating parallel to 4-20 mA HART loop protocol wiring runs, preventing electromagnetic induction from causing signal chatter or false trips on the Vnet/IP backplane.

Frequently Asked Questions

Q: How does the 50-pin connector layout maintain grounding across the 20-meter cable span?

A: The AKB331 cable integrates dedicated grounding pin assignments within the 50-pin configuration, connecting the outer braided shield directly to the cabinet protective earth (PE) terminal to maintain continuous shielding across the entire 20-meter run.

Q: What precautions prevent signal degradation over the 20-meter AKB331-M020 distance?

A: Insulation resistance of 100 M ohm minimum at 500 VDC ensures high signal fidelity. Installers must avoid exceeding the minimum bend radius and maintain segregation from high-voltage AC cables to prevent inductive noise coupling.

Field Installation Guidelines

Mount the SDV144 card directly into the Field Control Station (FCS) card cage until the backplane connector locks securely into place. Align the 50-pin connector of the AKB331-M020 cable with the module header, tightening the side locking screws to secure the physical connection. Route the 20-meter cable through dedicated low-voltage cable trays, ensuring the 6.8 mm diameter cable avoids sharp metallic edges. Secure the shield wire terminal directly to the cabinet grounding bar prior to applying 24 VDC loop power.

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