YOKOGAWA EA1*A ASE9740A-07 – 2-Wire Signal Conditioner Transmitter | YTSC / EJA Series Platform
Engineering Background
The YOKOGAWA EA1*A ASE9740A-07 is a precision 2-wire signal conditioner transmitter engineered for demanding industrial process measurement environments. Built on YOKOGAWA’s proven YTSC/EJA platform architecture, this unit delivers loop-powered signal conditioning with the reliability and accuracy that process engineers depend on for critical control loops.
Product Positioning
Designed for integration into DCS, PLC, and SCADA systems, the ASE9740A-07 serves as a field-hardened signal interface between process sensors and control room instrumentation. Its 2-wire loop-powered design eliminates the need for separate power wiring, reducing installation complexity and total cost of ownership in both greenfield and retrofit projects.
Complete Technical Specifications
| Manufacturer | YOKOGAWA Electric Corporation |
| Model Number | EA1*A ASE9740A-07 |
| SKU | EA1*A ASE9740A-07 |
| Device Type | 2-Wire Signal Conditioner Transmitter |
| Wiring Configuration | 2-wire loop-powered |
| Output Signal | 4–20 mA DC (standard) |
| Power Supply | Loop-powered (no separate supply required) |
| Mounting | DIN rail / panel mount compatible |
| Operating Temperature | -40°C to +85°C (field conditions) |
| Protection Class | IP65 / NEMA 4X (housing dependent) |
| Communication Protocol | HART (optional, suffix dependent) |
| Accuracy | ±0.1% of span (typical) |
| Weight | Approx. 100 g |
| Compliance | CE, RoHS, IECEx (region-specific) |
| Country of Origin | Japan |
Note: Full datasheet available upon request. Specifications subject to suffix code configuration. Contact Konmask for model-specific documentation.
Proven Application Environments
- Oil & Gas – Wellhead monitoring, pipeline pressure/flow signal conditioning
- Chemical & Petrochemical – Reactor loop instrumentation, hazardous area signal isolation
- Power Generation – Turbine control, boiler drum level transmitter loops
- Water & Wastewater – Pump station telemetry, remote sensor signal conversion
- Pulp & Paper / Food & Beverage – Process variable transmission in hygienic or wash-down environments
- Pharmaceutical – Validated loop instrumentation for GMP-compliant processes
- Building Automation / HVAC – BMS integration for temperature and pressure monitoring
Engineering Advantages
- Loop-Powered Simplicity – Eliminates auxiliary power wiring; reduces panel space and installation labor
- YOKOGAWA Reliability – Backed by decades of field-proven performance in mission-critical process industries
- Wide Temperature Range – Suitable for both arctic and tropical field deployments
- High Accuracy – ±0.1% span accuracy supports tight process control tolerances
- HART-Ready Architecture – Enables remote configuration, diagnostics, and asset management via HART communicator
- Compact Form Factor – Fits standard DIN rail enclosures; minimal footprint in marshalling cabinets
- Long Service Life – Designed for 10+ year operational lifespan with minimal maintenance
System Architecture & Signal Flow
The EA1*A ASE9740A-07 operates within a standard 2-wire 4–20 mA loop architecture:
- Field Sensor / Transducer → generates raw process variable signal
- EA1*A ASE9740A-07 Transmitter → conditions, scales, and transmits 4–20 mA signal over 2-wire loop
- Control Room / DCS / PLC Input Card → receives standardized 4–20 mA signal for process control logic
- HART Communicator (optional) → connects in parallel for remote diagnostics and configuration without loop interruption
This architecture ensures galvanic isolation, noise immunity, and long-distance signal transmission (up to 1500 m cable runs in typical installations).
Sourcing & Quality Verification
- Authentic YOKOGAWA OEM Parts – All units sourced through verified industrial distribution channels
- Pre-shipment Inspection – Each unit inspected for physical integrity, label authenticity, and packaging condition
- Traceability – Serial number and batch documentation available upon request for regulated industries
- Warranty – 12-month warranty against manufacturing defects; DOA replacement policy
- Counterfeit Prevention – Konmask maintains a zero-tolerance policy on non-genuine components; all stock is verifiable
Procurement Process
- Inquiry – Submit your BOM or model number to support@konmask.com or via the product page
- Quote – Receive a formal quotation within 1 business day including lead time and shipping options
- Order Confirmation – Purchase order or online checkout accepted; proforma invoice available for wire transfer
- Inspection & Dispatch – Unit inspected, packed, and dispatched with tracking within 1–3 business days
- Delivery – DHL / FedEx / SF Express international shipping; customs documentation provided
- After-Sales Support – Technical support and warranty claims handled directly by Konmask engineering team
Technical FAQ
Q: What does the asterisk (*) in EA1*A mean?
A: The asterisk is a wildcard representing a suffix character that denotes a specific configuration variant (e.g., explosion-proof rating, output range, or approval mark). Contact Konmask to confirm the exact suffix for your application.
Q: Is this unit HART-compatible?
A: HART compatibility depends on the specific suffix configuration. The ASE9740A-07 suffix typically indicates a specific output/approval variant. Confirm with Konmask for HART revision details.
Q: Can this transmitter be used in hazardous (Ex) areas?
A: Certain suffix variants carry ATEX / IECEx / FM approvals for use in Zone 1/2 or Division 1/2 hazardous areas. Provide your area classification and we will confirm suitability.
Q: What is the lead time for this model?
A: In-stock units ship within 1–3 business days. For out-of-stock items, lead time is typically 4–8 weeks from YOKOGAWA. Contact us for real-time availability.
Q: Do you provide calibration certificates?
A: Factory calibration documentation is available for new units. Third-party calibration certificates can be arranged upon request at additional cost.
Q: What are the compatible DCS/PLC input card specifications?
A: Any standard 4–20 mA analog input card with 250–600 Ω loop resistance is compatible. Confirm your input card’s loop supply voltage (typically 24 VDC) for proper loop design.
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Original Source: https://Konmask.com
Contact: support@konmask.com | +0086 19859288691
