Yokogawa ATRBS-00 S2 Terminal Module

Configured for signal interfacing in CENTUM VP and CS 3000 control architectures, the Yokogawa ATRBS-00 S2 (ATRBS-00 S2) Terminal Module provides direct physical/electrical execution of field-to-backplane signal routing, terminal connectivity, and wide-bandwidth data acquisition.

Hardware Specifications

Yokogawa DCS Process Control Characteristics

• 4-20 mA HART loop protocol: The terminal module maintains the signal transparency required for HART-compliant instrumentation. It ensures that analog loops connected via the terminal block do not experience signal attenuation or impedance mismatching, preserving the HART diagnostic signal integrity.
• FOUNDATION Fieldbus / Profibus PA connectivity: The module architecture is engineered to handle a broad frequency range (up to 100 kHz), making it suitable for high-speed pulse and digital I/O signal routing. This capability is mandatory for maintaining the timing precision of fast-response control loops in the DCS.
• Channel-to-channel isolation: The design incorporates isolation boundaries that prevent electrical cross-coupling between adjacent signal terminals. This is mandatory to decouple mixed-signal types (analog and digital) within the same terminal block, preventing noise injection during high-speed pulse processing.
• Cold junction compensation (CJC): The module assembly utilizes thermally conductive materials to maintain a stable reference temperature at the connection points. This is mandatory when interfacing with high-precision sensors, ensuring that measurement accuracy (0.01 percent FS) is preserved despite thermal variations in the cabinet.

Frequently Asked Questions

Q: Can the ATRBS-00 S2 handle high-frequency pulses from turbine flowmeters or encoders?

A: Yes, the module supports input frequencies up to 100 kHz. When connecting high-frequency pulse devices, ensure that shielded twisted-pair cabling is used and that the termination is properly grounded at the DCS cabinet to prevent ringing or pulse distortion.

Q: How does the -40 to +70 deg C operating range affect signal accuracy?

A: The module is calibrated to maintain its 0.01 percent accuracy rating across the entire temperature range. However, ensure that the field wiring insulation is also rated for these extremes to prevent leakage current, which can manifest as an offset error in analog measurement channels.

Field Installation Guidelines

• Mounting: Secure the module onto the standard mounting rail within the control cabinet. Ensure the terminal block connectors are fully seated and that locking screws are tightened, as vibration can cause intermittent contact resistance in low-level signal circuits.
• Grounding: Terminate the shield of all field-side cables to the cabinet’s dedicated instrument earth bus at the terminal module interface. This is mandatory to prevent ground loops and to provide a low-impedance return path for high-frequency noise.
• Wiring: Maintain strict separation (minimum 150 mm) between the terminal module and high-power conduits. This physical isolation is mandatory to prevent inductive coupling, which is critical for maintaining the high-accuracy (0.01 percent FS) specifications of the analog and pulse signals.