Description
The Yokogawa AAT141-S00 is a 16-channel, galvanically isolated thermocouple and millivolt input module designed for the CENTUM CS 3000 and CENTUM VP Distributed Control Systems (DCS). It processes low-level signals from industrial temperature sensors and voltage sources with high precision and integrated reference junction compensation.
Technical Specifications (Model Suffix: -S00)
| Parameter | Value |
| Manufacturer | Yokogawa Electric Corporation |
| Product Type | Thermocouple / Millivolt Input Module (Field Control Network / FIO) |
| Number of Channels | 16 channels, fully isolated |
| Input Signal Types | Thermocouple (Types: J, K, E, B, R, S, T, N) / Millivolt (-100 to 150 mV, -20 to 80 mV) |
| Measurement Accuracy | TC: \pm 30 \, \muV; mV: \pm 80 \, \muV (-100 to 150 mV span), \pm 30 \, \muV (-20 to 80 mV span) |
| Cold Junction Compensation | Within \pm 1 \, °C |
| Data Update Period | 1 second |
| Input Resistance (Power ON/OFF) | 2 \, M\Omega or larger |
| Withstanding Voltage | 1,500 V AC for 1 minute (between input and system logic) |
| Burn-out Detection | Configurable (Up/Down scale, 60-second detection time) |
| Current Consumption | 450 mA max (5 V DC) |
| Module Weight | 0.2 kg |
Supply Terms & Commercial Details
- Availability: Stock-dependent; standard inventory typically available for quick dispatch or project support.
- Lead Time: Stock items ship within 3 to 5 business days; project quantities or specific terminal block options vary by region.
- Warranty: 12-month standard replacement warranty covering functional hardware defects.
- Condition: New Surplus / Factory Original (verify exact packaging state upon inquiry).
- Pricing Note: Listed price is indicative, not final. Price subject to market conditions; contact us for a firm quote.
Engineering & Integration Guidance
When integrating the AAT141-S00 module into temperature monitoring cabinets, observe the following field parameters:
- Signal Source Resistance: Ensure total resistance of the signal source plus field wiring stays below 1,000 \, \Omega to maintain specified measurement accuracy.
- Terminal Block Selection: This base model utilizes pressure clamp terminal blocks or MIL cable adapter accessories (such as ATT4S or ATT4D series blocks) depending on the ordered option codes. Ensure proper shielding is grounded at the cabinet marshalling rail to prevent noise coupling on sensitive mV loops.
- Redundancy Support: The module supports dual-redundant node configurations when paired with matched base plates and node interface cards in CENTUM VP environments.
- Verification: Always cross-reference software scaling parameters and thermocouple types in CENTUM Engineering Builder against physical field wiring prior to loop commissioning.
Frequently Asked Questions
Can the AAT141-S00 handle RTD inputs directly?
No. For Resistance Temperature Detectors (RTDs) like Pt100, use dedicated modules such as the Yokogawa AAR181, as the AAT141 is explicitly engineered for thermocouple and millivolt signal inputs.
How is reference junction compensation handled for thermocouples?
The module features built-in reference junction compensation circuitry located at the terminal block interface, maintaining compensation accuracy within \pm 1 \, °C automatically.
Does replacing a faulty module require rewiring the field connections?
No. If utilizing standard pressure clamp terminal blocks, the terminal block assembly can typically be detached and retained while swapping out the electronic module block, minimizing downtime during maintenance.
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