Overview
Configured for thermocouple and mV signal connection in CENTUM VP FIO systems, the Yokogawa ATT4S-00 (ATT4S Pressure Clamp Terminal Block) provides direct physical and electrical termination between I/O modules and field devices.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | ATT4S-00 |
| Brand | Yokogawa |
| Origin | Japan |
| Power Consumption | Passive terminal block, no external power consumption |
| Product Type | Pressure Clamp Terminal Block |
| Compatible System | Yokogawa CENTUM VP FIO |
| Signal Type | Thermocouple / mV input signals |
| Channel Capacity | 16-channel |
| Terminal Technology | Pressure clamp connection |
| Surge Absorber Option | Available with suffix code 1 |
| EMC Standard | Conforms to EN 61000-6-2 when surge absorber option is installed |
Process Signal Termination and DCS Interface
The Yokogawa ATT4S-00 provides a pressure clamp wiring interface for CENTUM VP FIO I/O modules. It connects field instruments to I/O channels through a dedicated terminal structure, maintaining signal routing integrity between field wiring and control hardware.
Additionally, the terminal block supports thermocouple and mV input modules with ISA Standard G3 option configurations. The pressure clamp design allows secure conductor fixation without additional crimp terminals.
For Yokogawa process control systems, the terminal assembly supports channel-to-channel signal separation and cold junction compensation (CJC) signal routing when connected with compatible thermocouple input modules. The module interface maintains the electrical path required for accurate temperature measurement applications.
The ATT4S series also provides a surge absorber variant to protect connected I/O modules against transient disturbances. This option supports EMC requirements according to EN 61000-6-2.
Frequently Asked Questions
Q: What type of Yokogawa I/O modules can connect to the ATT4S-00 terminal block?
A: The ATT4S-00 is designed for Yokogawa CENTUM VP FIO I/O modules configured for thermocouple and mV input applications with 16-channel signal connections.
Q: Does the ATT4S-00 require an external power supply?
A: No. The ATT4S-00 is a passive terminal block and does not consume electrical power during normal operation.
Q: What is the difference between ATT4S-00 and the surge absorber version?
A: The ATT4S-00 standard version does not include a surge absorber. The suffix code 1 identifies the version equipped with surge protection components.
Field Installation Guidelines
- Verify the terminal block model before installation to ensure compatibility with the selected Yokogawa FIO I/O module.
- Install field wiring according to the CENTUM VP system connection specifications.
- Maintain proper cable routing separation between signal wiring and high-voltage power cables to reduce electrical interference.
- Connect cable shields according to the plant grounding standard and Yokogawa installation guidelines.
- Confirm terminal clamp engagement after conductor insertion to prevent loose signal connections.
- When using the surge absorber version, verify grounding continuity to maintain transient protection performance.
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