Description

Yokogawa AAT141-S00 TC/RTD Input Module

Configured for thermocouple, millivolt, and RTD signal acquisition in CENTUM and compatible Yokogawa DCS architectures, the Yokogawa AAT141-S00 (AAT141 TC/RTD Input Module) provides direct electrical interface processing across 16 isolated analog input channels.

Suffix Breakdown & Model Matrix

Model	Description
AAT141-S00	TC/RTD input module with 16 isolated input channels
AAT141	Base TC/RTD analog input module platform

Hardware Specifications

Parameter	Specification
Model	AAT141-S00
Brand	Yokogawa
Origin	Japan
Product Type	TC/RTD Input Modules
Input Channels	16 isolated channels
Supported Input Signals	Thermocouple, mV, RTD
Thermocouple Standards	JIS C1602:1995, IEC 584:1995
mV Input Ranges	-100 to 150 mV, -20 to 80 mV
RTD Type	Pt100, 3-wire
RTD Standards	JIS C1604:1997, IEC 751:1995
Allowable Input Voltage	+/-5 V
Withstanding Voltage	1500 VAC for 1 minute between input and system
Input Resistance	2 MOhm or larger (power ON/OFF)
TC Accuracy	+/-30 uV
mV Accuracy	+/-80 uV (-100 to 150 mV), +/-30 uV (-20 to 80 mV)
Allowable Signal Source Resistance	1000 Ohm or less
Signal Source Resistance Effect	+/-20 uV
Reference Junction Compensation Accuracy	Within +/-1 degC
RTD Measurement Current	1 mA
Temperature Drift	+/-80 uV/10 degC, +/-30 uV/10 degC, RTD: +/-120 mOhm/10 degC
Data Update Period	1 second
Burn-out Detection	UP/DOWN selectable
Burn-out Detection Time	60 seconds
Channel Configuration	Collective setting for all channels
Power Consumption	450 mA at 5 VDC maximum
External Connection	Pressure clamp terminal
Weight	0.2 kg
Operating Temp	Not specified in supplied data

Channel Isolation and Cold Junction Compensation

The module implements channel-to-channel isolation for low-level temperature signal acquisition. Isolation between field input and system circuitry is rated at 1500 VAC for 1 minute. Thermocouple processing incorporates internal reference junction compensation with compensation accuracy maintained within +/-1 degC.

For mixed signal installations using thermocouple and low-level millivolt transmitters, shield continuity and grounded reference routing should remain consistent across all 16 channels to minimize induced offset drift. The module accepts both JIS and IEC thermocouple standard definitions without external signal conversion hardware.

Frequently Asked Questions

Q: Does the AAT141-S00 support individual burn-out configuration per channel?
A: No. Burn-out detection settings are applied collectively across all channels.

Q: What RTD wiring configuration is supported by the module?
A: The module supports Pt100 RTD inputs using a 3-wire connection method compliant with JIS C1604:1997 and IEC 751:1995.

Q: Is external cold junction compensation hardware required for thermocouple inputs?
A: No. Internal reference junction compensation is integrated within the module circuitry.

Field Installation Guidelines

• Route thermocouple and RTD wiring separately from AC power conductors and motor drive cables.
• Use shielded instrumentation cable for all low-level mV and thermocouple inputs.
• Terminate cable shields at a single control cabinet grounding point to prevent ground loop currents.
• Verify Pt100 lead resistance balance before field termination to reduce measurement offset.
• Maintain consistent terminal torque across pressure clamp connections to prevent intermittent signal fluctuation.
• Confirm input polarity prior to energization, particularly on millivolt channels operating near zero reference potential.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems