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Technical specifications for AAR181-S50-S2
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Manufacturer:Yokogawa
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Product Category:DCS Systems
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Spare Part Number:AAR181-S50-S2
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Estimated shipping dimensions:3.2x10.8x13cm
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Weight:0.2 kg
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Tariff Code:8537101190
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Counliy of origin:Japan
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Product function:Isolated resistance-temperature-detector input module
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Input channels:12 isolated channels
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Primary sensor:Pt100, three-wire type
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Additional sensor:JPt100
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RTD standard:JIS C1604:1997 and IEC 751:1995
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Allowable input voltage:+/-5 V
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Withstand voltage:1500 V AC / 1 min, input-to-system
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RTD accuracy:+/-120 mOhm
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Measurement current:1 mA
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Wiring resistance:<=40 Ohm per wire
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Data update period:1 second
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External connection:Pressure-clamp terminal
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Suffix -S:Standard type
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Suffix 5:No explosion protection
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Suffix 0:Basic type
Information
Overview
Manuals
Common Applications
Product Precautions
Yokogawa AAR181-S50-S2 serves as the temperature-measurement interface between three-wire resistance sensors and a CENTUM VP field I/O node. Channel isolation keeps each measurement path separate while the module presents processed values to the host system.
- Twelve isolated RTD input channels
- Three-wire Pt100 measurement with JPt100 support
- One-second data update period
- Pressure-clamp terminal field connection
Use Yokogawa AAR181-S50-S2 only in the documented CENTUM VP field I/O context, with the field wiring, controller configuration and acceptance checks reconciled before service.
Important Notice: Confirm the complete AAR181-S50-S2 identifier and the installed interface conditions; do not substitute a nearby model without a documented engineering review.
Yokogawa AAR181-S50-S2 Manuals & Downloads
AAR181-S50-S2 Technical Reference (PDF)AAR181-S50-S2 Installation & Commissioning Guide (PDF)
Important Notice: The Technical Reference consolidates exact-model engineering data and interfaces; the Installation & Commissioning Guide organizes preparation, wiring checks and acceptance steps.
Process temperature acquisition
Collects twelve Pt100 or JPt100 resistance-temperature measurements for the control system.
Multi-point equipment monitoring
Brings several three-wire RTD points from vessels, piping or rotating-equipment auxiliaries into one isolated module.
Control-system maintenance
Supports exact-model replacement where the installed terminal arrangement and suffix code must be retained.
Loop fault investigation
Provides a defined channel structure for checking sensor, conductor and termination faults before module replacement.
Apply these checks specifically to Yokogawa AAR181-S50-S2 before installation, wiring changes, energization or return to service.
1
De-energize the node and field circuits before inserting, removing or rewiring the module.
2
Confirm the complete AAR181-S50-S2 code on the physical unit before replacement.
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Use only documented three-wire Pt100 or JPt100 circuits; do not apply transmitter current or voltage signals.
4
Keep each conductor within the documented wiring-resistance limit and match the paired signal-conductor resistance.
5
Use the specified pressure-clamp terminal and check every clamp for secure conductor retention.
6
Do not infer an explosion-protection approval: suffix 5 denotes no explosion protection.
7
Preserve the final -S2 identifier until an exact project or manufacturer code record confirms its meaning.
8
Commission one channel at a time and compare the indicated temperature with a known reference before release.
Technical notes
Exact-model content for Yokogawa AAR181-S50-S2 is based only on the cited manufacturer documentation. Verify the installed unit, wiring and system configuration before replacement or commissioning.
FAQ View All FAQ
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What signal type does Yokogawa AAR181-S50-S2 accept?It accepts three-wire Pt100 and JPt100 RTD signals.
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How many channels are available on Yokogawa AAR181-S50-S2?The module provides twelve isolated RTD input channels.
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What update period applies to Yokogawa AAR181-S50-S2?The data update period is one second.
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Which field terminal is used with Yokogawa AAR181-S50-S2?It uses a pressure-clamp terminal.
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What does the S50 segment mean in Yokogawa AAR181-S50-S2?S denotes standard type, 5 denotes no explosion protection, and 0 denotes basic type.
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What must match when replacing Yokogawa AAR181-S50-S2?Match the complete code, node slot, terminal arrangement and channel assignments before installation.
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What wiring check is required for Yokogawa AAR181-S50-S2?Keep wiring resistance at 40 ohms or less per wire and keep the paired signal-conductor resistance equal.
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How should Yokogawa AAR181-S50-S2 be accepted after installation?Verify the exact code, inspect every clamp, energize the node, and compare each configured channel against a known temperature or resistance reference.
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