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- Model: DX1012-3-4-2/A3/C3
- Brand: Yokogawa
- Series: DAQSTATION DX1000 / DXAdvanced
- Core Function: Records and monitors 12 process input channels
- Type: Paperless Data Acquisition Recorder
- Key Specs: 12 channels, 400 MB internal memory, CF card, 6 alarm outputs, RS-422-A/485
Product Introduction
Yokogawa DX1012-3-4-2/A3/C3 is a 12-channel DAQSTATION DX1000 paperless recorder for industrial data acquisition and process monitoring. The base DX1012 configuration provides 12 measurement channels with a 1 s standard measurement interval and 125 ms fast-sampling mode. The specified -3-4-2 configuration adds 400 MB internal memory, a CF card, and English display with °F and daylight-saving-time support.
The option codes are where this particular configuration becomes useful. /A3 provides 6 alarm outputs, while /C3 adds an RS-422-A/485 interface. The recorder accepts DC voltage, thermocouple, RTD, and digital inputs, making it suitable for plant data logging, equipment monitoring, test benches, and process records. Yokogawa also confirms that channel count is model-specific; a DX1006 cannot simply be expanded into a DX1012.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Model | DX1012-3-4-2/A3/C3 |
| Manufacturer | Yokogawa |
| Product Type | Paperless Data Acquisition Recorder |
| Series | DAQSTATION DX1000 / DXAdvanced |
| Number of Inputs | 12 channels |
| Standard Sampling | 1 s |
| Fast Sampling | 125 ms |
| Internal Memory | 400 MB |
| External Media | CF card |
| Display Language | English, °F, DST |
| Alarm Output | /A3, 6 points |
| Communication | /C3, RS-422-A/RS-485 |
| Input Types | DC voltage, TC, RTD, DI |
| Power Supply | 90-132 VAC or 180-264 VAC, depending on supply configuration |
| Dimensions | Approx. 144 × 144 × 228.5 mm |
| Mounting | Panel mount |
| Environmental Rating | Up to IP65/NEMA4 depending on configuration |
Yokogawa’s current documentation identifies the DX1012 as a 12-channel model with 1 s normal sampling and 125 ms fast sampling. The DX1000 family supports up to six optional alarm outputs, while /C3 specifically denotes RS-422-A/485 communication.
YOKOGAWA DX1012-3-4-2/A3/C3
Application and Selection Notes
This configuration makes sense where operators need a physical front-panel recorder and a straightforward historical record of process signals. Common applications include power equipment monitoring, thermal test systems, factory utilities, laboratory test rigs, and production-line data logging.
The /A3 option is especially useful when several alarm conditions must be brought into external annunciation or control. The /C3 interface is useful for legacy serial networks, but it should not be confused with the Ethernet option used on other DX1000 configurations. Yokogawa lists /C2 as RS-232 and /C3 as RS-422-A/485, with these communication options mutually exclusive.
Do not order by “DX1012” alone. The suffix matters. Internal memory, media, display settings, alarm outputs, and serial communication can all change with the configuration code.
Advantages and Limitations
Advantages
- 12 independent measurement channels
- 400 MB internal memory
- CF-card storage
- 125 ms fast-sampling mode
- 6 alarm outputs through
/A3 - RS-422-A/485 through
/C3 - Supports common industrial measurement inputs
- Suitable for panel-mounted continuous data recording
Limitations
This is a legacy DX1000-generation recorder, not a modern cloud-connected data historian. Serial communication also requires careful configuration of baud rate, addressing, and wiring. For a new installation requiring Ethernet, remote access, or current cybersecurity functions, a newer platform may be a better fit.
Procurement and Global Shipping Notes
| Item | Recommended Handling |
| Condition | Confirm New Original, New Surplus, or Refurbished |
| Stock | Verify physical inventory before PO |
| Lead Time | Confirm actual warehouse availability |
| Warranty | State clearly on quotation and PI |
| Packaging | ESD protection plus shock-resistant carton |
| Export Documents | Commercial Invoice, Packing List, COO when required |
| Shipping | Air courier for urgent MRO orders |
| Incoterms | FCA, EXW, or DAP depending on buyer requirement |
| Customs Description | Yokogawa industrial data acquisition recorder |
| Country of Origin | Confirm from product label and supplier documentation |
For international shipments, keep the complete model code on the Commercial Invoice and Packing List. Writing only “Yokogawa recorder” is unnecessarily vague and can complicate classification or customs inspection.
Quality Inspection and Test SOP
1. Inbound inspection
Verify supplier traceability, packing documentation, serial number, nameplate, enclosure condition, display, terminals, and accessories. Look for corrosion, scratches, yellowing, or evidence of previous repair.
2. Live test
Use a compatible Yokogawa DX1000 test setup. Check power-up diagnostics, display operation, channel recognition, alarm outputs, CF-card operation, and /C3 serial communication. Where practical, simulate representative input signals and record the results in a Test Report.
3. Electrical testing
Check grounding continuity and applicable insulation requirements. Do not apply a generic 500 V megohmmeter test across sensitive electronic circuits unless the manufacturer’s procedure explicitly permits it.
4. Configuration verification
Record the firmware and hardware revision where accessible. Save configuration information and photograph terminal wiring or switch settings before removing the original recorder.
5. Final QC
After testing, place the unit in ESD protection, add cushioning, use a suitable carton, and attach the QC Passed label with inspection date. Test photographs or video can be supplied when the corresponding test has actually been completed.
Common Replacement Risks
Suffix mismatch: A DX1012 base model is not enough to guarantee the same functionality. The /A3 and /C3 options are part of the purchased configuration.
Communication mismatch: RS-422-A/485 is not the same as RS-232 or Ethernet. Verify the existing wiring and communication settings before installation.
Input configuration: Confirm thermocouple, RTD, voltage, and digital-input requirements channel by channel. Do not assume every channel is wired identically.
Power configuration: Check the installed supply range before energizing the recorder. The DX1000 family supports different AC supply ranges.
CF-card handling: Legacy recording systems can be sensitive to media condition and formatting. Back up existing data before replacing or reinitializing a card.
One practical rule from the field: photograph the rear terminals before removal. It is faster than reconstructing a 12-channel wiring layout from memory.
Related Models
DX1002: 2-channel DAQSTATION DX1000 model with the same general product architecture.
DX1004: 4-channel version for installations requiring fewer measurement inputs.
DX1006: 6-channel version; Yokogawa confirms that channels cannot be added later to convert it into a DX1012.
DX2000 series: Larger DX-family recorders offering 4 to 48 channels for applications needing more measurement points.
Quick Conclusion
- 12-channel Yokogawa DAQSTATION DX1000 recorder.
- 400 MB internal memory with CF-card storage.
- 1 s standard sampling and 125 ms fast sampling.
/A3provides 6 alarm outputs./C3provides RS-422-A/485 communication.- Suitable for legacy industrial data acquisition and process monitoring.
- Match the complete suffix code before purchase.
FAQ
What is the YOKOGAWA DX1012-3-4-2/A3/C3?
It is a 12-channel paperless data acquisition recorder from the Yokogawa DAQSTATION DX1000 family.
How many inputs does the DX1012 have?
The DX1012 provides 12 measurement channels. Its standard sampling interval is 1 s, with a 125 ms fast-sampling mode.
What does /A3 mean?
/A3 specifies 6 alarm output points.
What does /C3 mean?
/C3 specifies an RS-422-A/RS-485 communication interface.
Can a DX1006 be upgraded to a DX1012?
No. Yokogawa states that channels cannot be added to DX1000 models, so a DX1006 cannot simply be converted into a DX1012.
What should buyers verify before ordering?
Verify the complete model and option code, input configuration, AC power requirement, alarm outputs, communication interface, physical condition, firmware, and actual stock status before issuing the purchase order.
