Product Core Brief
- Model: AAR181-S50 S2
- Brand: YOKOGAWA
- Series: CENTUM VP / CS 3000 Analog I/O
- Core Function: 12-channel isolated RTD input module for CENTUM VP/CS 3000 FCS.
- Product Type: DCS RTD Input Module
- Key Specs: 12 channels | RTD input | Channel isolation | Non-explosion-proof | S2 style/revision
- Condition: New Original (New Surplus) / Factory Sealed
Product Introduction
Temperature loops are only as reliable as the input card reading them. The is a YOKOGAWA CENTUM VP/CS 3000 12-channel RTD input module with channel-to-channel isolation. It is designed for process plants where temperature measurement stability, ground-loop immunity, and correct terminal interface all matter.
For maintenance and procurement teams, this module is a practical OEM replacement for aging or failed RTD cards. Twelve isolated channels help limit cross-channel interference, and the S2 suffix indicates a specific style or revision. The terminal interface option is not fixed by the base model alone — it may include /R8S00, /R8S10, /R8D00, /R8D10, or /CCC01, so the exact label must be confirmed before installation.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Full Model | S2 |
| Product Type | RTD Input Module |
| Compatible System | YOKOGAWA CENTUM VP / CS 3000 DCS |
| Signal Type | RTD |
| Channel Count | 12 channels |
| Isolation | Channel-isolated |
| Explosion Protection | Non-explosion-proof (-5) |
| Style/Revision | S2 |
| Option Code | May include /R8S00, /R8S10, /R8D00, /R8D10, or /CCC01; verify on label |
| Typical Application | Process temperature measurement for reactors, heat exchangers, pipelines, and vessels |
Key Selling Points & Differentiators
- 12-channel isolated RTD input: Helps prevent ground loops and reduces cross-channel interference in temperature measurement racks.
- Direct CENTUM VP/CS 3000 fit: Designed for YOKOGAWA FCS racks, making it a practical OEM replacement for maintenance or spares.
- Multiple terminal options: Supports pressure-clamp or double-pressure-clamp RTD terminal boards, with or without surge absorbers.
- S2 revision clarity: The S2 suffix helps identify the specific style; always match it against the existing card before substitution.
- Not recommended for: 4–20 mA, 1–5 V DC, thermocouple, or millivolt inputs. For those signals, verify AAI135, AAI141, AAI143, AAT141, or AAT145 instead. Always confirm the exact terminal option code before ordering.
Quality Transparency SOP
RTD input modules should be verified for both electrical integrity and channel behavior.
- Incoming visual QA: Inspect factory sealing, label integrity, connector pins, PCB condition, and corrosion indicators.
- Isolation verification: Use a Fluke multimeter or insulation tester to confirm channel-to-channel and channel-to-ground isolation.
- RTD simulation check: Apply a calibrated RTD simulator and verify channel response, offset, and linearity across multiple channels.
- Open-circuit detection check: Confirm the module correctly identifies open RTD inputs, as this is a common failure mode in the field.
- Final packing: Record serial/lot information, apply anti-static packaging, and seal with a condition label.
Technical Risk Avoidance
Confirm the exact terminal option code. The AAR181-S50 S2 may ship with different RTD terminal adapters. Installing it with the wrong adapter can create wiring mismatches.
Do not substitute for AAI or AAT modules. The AAR181 is an RTD input module. It cannot replace 4–20 mA, voltage, thermocouple, or millivolt input cards.
Verify RTD type and wiring. Confirm whether the existing loop uses Pt100 or another RTD type, and whether it is 2-, 3-, or 4-wire. Incorrect wiring causes measurement error.
Check FCS slot and engineering configuration. Confirm tag mapping, RTD type assignment, and burnout detection settings in the CENTUM VP/CS 3000 project before inserting the module into a live rack.
Buyer’s FAQ
Is this module genuine YOKOGAWA?
Yes. The is an OEM YOKOGAWA CENTUM VP/CS 3000 RTD input module. We supply it as new original/new surplus unless otherwise stated.
What does S2 mean?
“S2” indicates a specific style or revision. Because terminal interface options can vary, confirm the exact label and option code before installation.
Does it support 4–20 mA inputs?
No. The AAR181 is an RTD input module. For 4–20 mA inputs, verify AAI135, AAI141, or AAI143 instead.
What terminal options are available?
Common options include /R8S00, /R8S10, /R8D00, /R8D10, and /CCC01, depending on the RTD terminal board and surge protection requirements.
What is the warranty and lead time?
Each module carries a standard 12-month functional warranty from shipment, excluding damage from incorrect installation, wiring mismatch, or wrong terminal adapter. In-stock units typically ship within 1–3 business days after payment confirmation.
