Yokogawa DX1012-3-4-2/A3/C3 | 400 MB Memory

Description

Unboxing & Physical Snapshot

• Manufacturer: Yokogawa Electric Corporation
• Model: DX1012-3-4-2/A3/C3
• Product family: DX1000 DAQSTATION / DXAdvanced paperless recorder.
• Channel capacity: 12 universal input channels. Yokogawa identifies the DX1012 specifically as the 12-channel DX1000 model.
• Configuration: -3 = 400 MB internal memory; -4 = CompactFlash card with medium; -2 = English display, °F and DST. /A3 = six alarm-output relay points; /C3 = RS-422A/485 serial interface.
• Physical dimensions: Approximately 144 × 144 × 224.1 mm (W × H × D); depth increases to approximately 228.5 mm when /H2 or /PM1 is fitted.
• Approximate unit weight: 2.9 kg, excluding optional features.
• Estimated shipping weight: Approximately 3.5–4.5 kg packed, depending on CF media, mounting hardware, ESD protection, and carton.
• What’s in the box: DX1012 recorder, mounting hardware, terminal/accessory hardware, and CF media where supplied with the ordered configuration. Verify the packing list before accepting the shipment.
• Front-panel protection: IP65/NEMA Type 4 protection is specified for the front panel when properly panel mounted; the qualification does not apply indiscriminately to every mounting arrangement.

Product Introduction

The DX1012-3-4-2/A3/C3 is a panel-mounted 12-channel Yokogawa DAQSTATION designed for continuous process measurement and recording. It accepts universal process inputs—including DC voltage, thermocouples, RTDs, digital inputs, and current inputs using the appropriate external shunt—and stores measured data internally and on removable CompactFlash media.

The option suffix is critical for replacement control. This particular unit combines six alarm relay outputs with RS-422A/485 serial communications, so a DX1012 with a different /A or /C configuration should not be considered automatically interchangeable. Yokogawa also states that channels cannot be added to a DX1000 after manufacture, making the 12-channel identity a fixed hardware characteristic rather than a field expansion option.

Core Technical Specifications

Yokogawa DX1012-3-4-2/A3/C3

Yokogawa specifies a 125 ms fast-sampling mode for the DX1012, while normal measurement intervals can be 1, 2, or 5 seconds. The 1-second normal interval is unavailable when the A/D integration time is set to 100 ms.

The six-relay /A3 option and /C3 serial interface are especially important during incoming inspection. /C3 supports EIA RS-422A/485 and Yokogawa identifies both its proprietary DX communication protocol and Modbus master/slave functions.

? Global Compliance & Industry Certifications

For this recorder, compliance should be assessed at the complete model-code level, not from the DX1012 base model alone.

• CE Mark: Applicable DX1000 configurations have European conformity documentation; verify the exact product revision and declaration retained with the asset.
• RoHS: Yokogawa provides RoHS compliance documentation for its recorder/controller product portfolio.
• UL/cUL: Verify the applicable certification for the exact revision before entering a North American compliance record.
• EMC: The completed installation must maintain the grounding, wiring, shielding, and cabinet practices required by the Yokogawa installation documentation.
• ATEX/IECEx: Do not assume ATEX or IECEx certification. The standard configuration should not be represented as hazardous-area certified without a product-specific certificate.
• Marine approvals: DNV GL or other marine certification should only be claimed when the exact model/configuration is covered by the applicable approval.
• Front-panel ingress protection: IP65/NEMA Type 4 applies to the specified panel-mounted front construction, not to an unrestricted claim that the complete recorder is waterproof.

The electrical installation also matters. Yokogawa specifies protective-earth grounding and warns against using the functional-ground terminal as a substitute for protective earth; this distinction should remain visible in the installation record.

Verify specific lot certifications with OEM.

? Long-Term Storage & Asset Preservation Guide

Protect the CompactFlash media and its data. The -4 configuration includes a CF card with medium, while the -3 configuration provides 400 MB internal memory. Store the original CF card with the recorder and preserve any configuration/data files separately; do not assume an old card remains readable after years of uncontrolled storage.

Keep the recorder dry and ESD protected. For long-term warehouse storage, target below 60% RH where practical, with no condensation or rapid temperature cycling. Keep the rear terminal area covered so dust cannot accumulate around the signal and alarm terminals.

Preserve the configuration record. Record the complete -3-4-2/A3/C3 code, serial number, hardware revision, CF media identification, alarm wiring configuration, and RS-422/485 communication settings. This is important because the /A3 and /C3 options are hardware-specific rather than software-only selections.

Before commissioning a stored unit, inspect the LCD, front bezel seal, rear terminals, mounting hardware, CF interface, and communication connector. Check the recorder’s date/time and configuration after startup before trusting archived measurement records.

Physical Installation Prerequisites

• Install as a flush panel-mounted instrument on a vertical plane; downward inclination of up to 30 degrees from horizontal is permitted by the specified construction.
• Panel thickness should be 2–26 mm.
• Use a panel cutout of approximately 137 × 137 mm, with the exact cutout and mounting arrangement taken from the current Yokogawa mechanical drawing.
• Maintain adequate rear clearance for the approximately 224.1 mm enclosure depth, plus wiring bend radius and service access.
• Do not obstruct the ventilation openings or place heat-generating equipment directly against the recorder.
• As a practical cabinet allowance, maintain approximately 50 mm of free space around ventilation paths, unless the Yokogawa cabinet drawing specifies otherwise.
• Connect protective earth to the designated protective-ground arrangement; do not substitute the functional-ground terminal.
• The standard power supply is 100–240 VAC, with an allowable range of 90–132 VAC or 180–264 VAC. Do not operate in the 132–180 VAC range.
• Provide a suitable upstream disconnect and fuse/breaker arrangement as specified by Yokogawa.
• Keep thermocouple, RTD, and low-level analog wiring separated from high-current switching and motor/VFD wiring.
• For /C3, verify RS-422A/485 polarity, termination, station addressing, and communication parameters before connecting the network.
• For /A3, verify each of the six alarm relay assignments against the plant alarm matrix before energizing external circuits.

Buyer’s FAQ

Which HS tariff code should be used for this ?

Do not classify it simply as an electronic component. The is a complete industrial data-acquisition recorder, and the correct HS classification depends on the importing country’s tariff schedule and the declared principal function. Have the customs broker confirm the final tariff code before the commercial invoice is issued.

What should be declared as the Country of Origin?

Use the actual COO supported by the physical unit and Yokogawa documentation. Do not infer origin from the seller’s warehouse location or shipping country. Keep the COO evidence with the purchase order, commercial invoice, and asset record.

Should I insure the shipment?

For an obsolete or hard-to-source recorder, yes. The unit is approximately 2.9 kg before optional hardware and packaging, so use an appropriately sized carton with ESD protection and impact cushioning; photograph the front bezel, nameplate, rear terminals, and CF media before dispatch.

Does this unit contain the latest firmware?

Do not assume it does. The -3-4-2/A3/C3 code establishes the hardware and option configuration, but software/firmware revision must be verified from the actual instrument. Yokogawa maintains separate firmware, software, manuals, and support resources, so the installed revision should be compared with the site’s existing DX configuration before deployment.

For a controlled spare, record the firmware revision, hardware revision, serial number, CF card condition, alarm configuration, and RS-422/485 settings during incoming inspection.