Overview
The Yokogawa ATT4S-00 S2, also cataloged as the ATT4S-00 Pressure Clamp Terminal Block, operates as a dedicated hardware component for field signal termination and electrical connection within Yokogawa CENTUM VP and ProSafe-RS I/O systems.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ATT4S-00 S2 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | Approx. 0.5 kg – 0.9 kg |
| Operating Temp | -20 deg C to +70 deg C |
| Power Consumption | Passive terminal block, no external power consumption |
| Product Type | Pressure Clamp Terminal Block |
| Channel Configuration | 16 channels |
| Connection Method | Pressure clamp wiring termination |
| Signal Compatibility | Analog and digital field signals |
| Rated Voltage | 24 VDC |
| Rated Current | 10 A |
| Compatible Platforms | Yokogawa CENTUM VP and ProSafe-RS I/O systems |
Yokogawa DCS Signal Termination Characteristics
The ATT4S-00 S2 provides physical termination between field wiring and Yokogawa I/O modules. It supports structured cabinet wiring by maintaining fixed channel allocation and direct signal routing. In addition, the pressure clamp mechanism reduces mechanical loosening caused by vibration and thermal cycling.
For Yokogawa process control installations, terminal assemblies must maintain signal integrity for standard instrumentation interfaces. Therefore, installation practices typically consider 4-20 mA HART loop protocol compatibility, FOUNDATION Fieldbus / Profibus PA connectivity separation, and channel-to-channel isolation requirements when selecting associated I/O hardware.
The terminal block functions as a passive interface component. It does not perform signal conversion, communication processing, or firmware-based operations.
Frequently Asked Questions
Q: Does the Yokogawa ATT4S-00 S2 provide signal isolation between channels?
A: The ATT4S-00 S2 is a passive terminal connection device. Channel isolation depends on the connected Yokogawa I/O module design and system configuration.
Q: Can the ATT4S-00 S2 be replaced while the control system is operating?
A: Replacement procedures depend on the connected I/O module and cabinet design. Field power isolation and maintenance procedures should be confirmed before removal.
Q: Does the terminal block require firmware configuration?
A: No. The ATT4S-00 S2 is a passive wiring component and does not contain firmware or configurable processing functions.
Field Installation Guidelines
- Mount the terminal block according to the Yokogawa cabinet installation drawing and I/O module compatibility requirements.
- Verify terminal assignment before connecting field instruments to prevent incorrect signal routing.
- Use appropriate cable shielding and connect shield layers according to the control system grounding specification.
- Separate low-level analog signal wiring from high-current power conductors to reduce electrical interference.
- Confirm clamp engagement after conductor insertion to ensure stable mechanical contact.
- Check wiring polarity and loop continuity before system commissioning.
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