Overview
The Yokogawa ATT4D-00, also cataloged as the ATT4D-00 Terminal Block, operates as a dedicated hardware component for field signal termination within Yokogawa CENTUM VP FIO I/O architectures.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ATT4D-00 |
| Brand | Yokogawa |
| Origin | Japan |
| Product Type | Terminal Block / Signal Interface Module |
| Compatibility | Yokogawa CENTUM VP FIO and compatible DCS I/O architectures |
| Terminal Design | Pressure clamp terminal connection structure |
| Withstanding Voltage | 500 V AC for 1 minute between terminals and ground |
| Insulation Resistance | 100 M ohm or greater at 500 V DC |
| Weight | Approx. 0.25 kg |
| Dimensions | Approx. 130 mm x 30 mm x 100 mm |
| Operating Temp | Approx. -20 deg C to +70 deg C |
| Power Consumption | Passive terminal block; no external power consumption |
Yokogawa DCS Field Signal Termination Characteristics
The Yokogawa ATT4D-00 provides direct electrical termination between field wiring and Yokogawa I/O modules. Therefore, it maintains stable signal routing without adding active signal processing functions.
The terminal block supports pressure clamp wiring technology, which secures conductor placement and reduces mechanical loosening during long-term operation. Additionally, the insulation structure supports separation between field circuits and grounding paths.
For Yokogawa process control systems, terminal interfaces must maintain signal integrity for analog and digital field channels. The ATT4D-00 supports this requirement through controlled wiring organization and electrical isolation characteristics.
Frequently Asked Questions
Q: Does the Yokogawa ATT4D-00 require an external power supply?
A: No. The ATT4D-00 is a passive terminal block and does not consume electrical power. It only provides field wiring termination and signal connection functions.
Q: What wiring connection method does the ATT4D-00 use?
A: The ATT4D-00 uses a pressure clamp terminal design. This structure applies mechanical clamping force to maintain conductor contact within the terminal assembly.
Q: Can the ATT4D-00 be used with Yokogawa FIO modules?
A: Yes. The ATT4D-00 is designed for Yokogawa FIO I/O module applications within compatible CENTUM VP control system configurations.
Field Installation Guidelines
Install the Yokogawa ATT4D-00 inside the designated Yokogawa control cabinet or I/O enclosure according to the system hardware configuration manual.
Before wiring, verify terminal assignments between field devices and the connected I/O module. Use appropriate cable routing methods to separate signal wiring from high-voltage power cables.
Connect cable shields according to the plant grounding standard. Avoid unnecessary shield loops and maintain proper grounding continuity to reduce electrical interference.
During installation, inspect terminal clamping conditions and confirm that conductors are fully inserted. After wiring completion, perform electrical continuity checks before system commissioning.
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