YOKOGAWA CX2420 3-2-2 | 20-Channel DAQSTATION Controller

• Model: CX2420 3-2-2
• Brand: Yokogawa
• Series: DAQSTATION CX2000
• Core Function: Process measurement and embedded control
• Type: Control and Measurement Station
• Key Specs: 4 internal control loops; 20 measurement channels; ATA Flash memory; Ethernet
• Status: Legacy / discontinued

Product Introduction

Yokogawa CX2420 3-2-2 is a DAQSTATION CX2000 control and measurement station configured with 4 internal control loops and 20 measurement channels. The official Yokogawa specification identifies the CX2420 as the 4-loop, 20-channel member of the CX2000 family. The “3-2-2” suffix identifies the storage, communications, and language configuration.

This configuration uses an ATA Flash memory card, Ethernet communication, and English display language. The CX2000 platform combines paperless data acquisition with embedded PID control, making it useful for process monitoring and control duties where recording and regulation are handled in one instrument.

Key Technical Specifications

Yokogawa documentation confirms that the CX2420 supports 20 measurement channels and 4 embedded control loops. The broader CX2000 platform also supports optional RS-232 or RS-422A/485 interfaces, alarm outputs, mathematical functions, program control, and other configuration options.

YOKOGAWA CX2420 3-2-2

Application and Selection Notes

The unit fits process plants, test systems, utilities, production equipment, and laboratory process stations where measurement recording and closed-loop control need to coexist.

Four embedded control loops are the key distinction here. If the application only needs data acquisition, a lower CX2000 configuration may be sufficient. If the existing system relies on the four internal loops, however, substituting a smaller model could require control logic changes.

One detail deserves attention: 3-2-2 is not just a cosmetic suffix. It identifies specific configuration choices. Yokogawa’s coding table shows -3 for ATA Flash memory, -2 for RS-422A/485 in the basic configuration table, while later documentation describes the communication-code structure in detail. Verify the complete nameplate before ordering.

Quality Inspection and Testing

For a legacy Yokogawa controller, the inspection process should cover both the recorder and control functions:

1. Inbound inspection: Verify serial number, nameplate, suffix code, display, keys, terminals, memory media, and visible PCB condition.
2. Live test: Power the station from a controlled supply and check boot sequence, display, operator keys, measurement channels, Ethernet communication, and internal-loop operation where a suitable test setup is available.
3. Electrical testing: Check supply circuitry, grounding continuity, and insulation condition as applicable.
4. Configuration verification: Record firmware information, communication settings, measurement configuration, and installed option codes.
5. Final QC: Photograph the unit, record test results, protect the display and connectors, and package it with appropriate cushioning.

A test report, photographs, or functional-test video can be supplied when available.

Replacement Pitfalls

Suffix mismatch: Do not buy a CX2420 based only on the base model. Storage, communication, language, and option codes can change the actual configuration.

Control-loop configuration: The four internal loops are part of the CX2420’s core specification. Confirm that the replacement retains the required control functions.

Communication interface: Ethernet and serial-interface configurations are not necessarily identical across CX2000 variants.

Storage media: The -3 configuration is associated with an ATA Flash memory card. Preserve application data and configuration files before replacing the original unit.

Power supply: Verify the actual supply option on the nameplate. The CX2000 family was available in multiple power configurations.

Personally, I would photograph the complete suffix code and option-code label before ordering. That takes less than a minute and can prevent a surprisingly expensive compatibility problem.

Warranty and Availability

Condition: Confirm whether the offered unit is New Original (New Surplus), used, or refurbished.

Availability: The CX2420 family is a legacy product, and current industrial references list CX2420 configurations as discontinued.

Lead Time: Subject to physical stock, testing, and export processing.

Warranty: Supplier warranty applies according to the agreed commercial terms.

The YOKOGAWA CX2420 3-2-2 is a legacy CX2000 control and measurement station with 4 embedded control loops and 20 measurement channels. For international procurement, verify the complete configuration code, storage medium, communication interface, power rating, condition, country of origin, and export documentation before shipment.