Description
YOKOGAWA ATK4A-00 – Pluggable Terminal Block for Reliable I/O Field Wiring
The YOKOGAWA ATK4A-00 is a factory-grade, pluggable terminal block designed for clean and secure field wiring to Yokogawa I/O modules in DCS/PLC cabinets. From my experience, the ATK-series blocks are favored in upgrades and plant expansions because they keep wiring neat, speed up module swaps, and typically reduce the chance of loose connections during maintenance. You might notice that it fits right into standard Yokogawa control panels and acts as the passive bridge between field signals and the I/O electronics—no external power, just robust mechanical and electrical contact.
Our Order Placement Process and Guarantees
- Warranty: 365 days
- Lead time: 1 week if in stock; no more than 1 month at the latest
- Payment: 50% advance payment; full payment prior to delivery
- Express options: FedEx, UPS, DHL
- Packaging: ESD-safe, shock-protected, with traceable labeling
- Pre-ship check: Visual inspection and connector integrity verification
Key Features
- Passive pluggable terminal block – No external power; serves as the mechanical/electrical interface between field wiring and Yokogawa I/O modules.
- Secure screw-clamp termination – Stable connections for industrial environments; typically supports ferrules for tidy wiring.
- Service-friendly design – Clear channel markings help maintenance teams trace signals faster during shutdowns.
- Cabinet-ready format – Sized for standard Yokogawa control bays; pairs with matching I/O bases for quick installation.
- Durable housing and contacts – Industrial-grade materials that handle 24/7 operation in most control rooms.
- Consistent field signal handling – Typically used for analog (mA/V) and digital signals depending on the associated I/O card.
Technical Specifications
| Brand / Model | YOKOGAWA ATK4A-00 |
| HS Code | 8538.90 (Parts for electrical control apparatus) |
| Product Type | Pluggable terminal block for I/O wiring |
| Power Requirements | None (passive component) |
| Operating Temperature | Typically 0 to 55°C when installed in a conditioned control cabinet |
| Signal Input/Output Types | Field termination for analog (current/voltage) and discrete signals, depending on the paired I/O module |
| Communication Interfaces | Not applicable (screw terminal interface only) |
| Installation Method | Mounts to the designated Yokogawa I/O base/terminal unit inside a control cabinet; front-access screw terminations |
| Dimensions & Weight | Compact, low-profile terminal block format suitable for dense rack layouts |
Application Fields
The ATK4A-00 is typically used across process automation and factory control where stable, serviceable wiring is a must:
- Oil & Gas, petrochemical, and chemical DCS cabinets for analog and discrete field loops
- Power generation and water treatment control rooms
- Pharmaceutical and food plants where tidy, documented wiring is audited
- OEM machine panels and brownfield retrofits needing drop-in compatibility
“We swapped in ATK-series blocks during a turnaround—channel identification was straightforward and it shaved hours off loop checks.” — Maintenance supervisor, downstream plant
Advantages & Value
- Reliability in the cabinet – From my experience, screw-clamp terminations on ATK blocks hold up well under vibration and temperature cycling in most cabinets.
- Compatibility – Designed to mate with Yokogawa I/O bases, simplifying replacements and minimizing wiring changes during upgrades.
- Maintenance time savings – Clear labeling and pluggable form factor can shorten loop checks and fault finding.
- Total cost control – A practical spare to keep on-hand; protects the investment in your I/O cards by ensuring proper field termination.
- Technical support – We can assist with selection, cross-references within the ATK family, and cabinet bill-of-material checks.
Installation & Maintenance
- Cabinet environment – Install in a dry, conditioned control cabinet. Maintain adequate ventilation and keep within the typical 0–55°C range.
- Wiring practices – Use properly sized ferrules or tinning where appropriate; segregate analog and digital wiring; maintain shield continuity per site standards.
- Torque and retightening – Tighten terminal screws to the manufacturer’s recommended torque and re-check after thermal cycling.
- Clean handling – Avoid touching contacts; periodically dust the assembly and check for signs of loosened or oxidized terminations.
- Module pairing – Confirm the terminal block variant matches the I/O module pinout before energizing; label channels during commissioning.
- Firmware/Calibration – Not applicable to the terminal block itself; follow I/O module firmware/calibration policies as required.
Quality & Certifications
- Typically compliant with CE and RoHS for control cabinet components
- Produced under ISO 9001 quality systems
- Designed for use within UL/IEC-compliant panel assemblies (when installed per applicable standards)
- Supplier warranty: 12 months from delivery
Supporting Components (Commonly Paired)
If you’re building or refreshing a cabinet, we can also help with matching Yokogawa I/O modules, terminal bases, DIN-rail hardware, and labeling accessories. One thing I appreciate is how the ATK family keeps panel layouts consistent across different I/O types, which in many cases simplifies spare parts planning.
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