Description
Product Overview
Part Number: AAR181-S50 Manufacturer: Yokogawa (Yokogawa Electric, Japan) Product Series: CENTUM VP DCS, FIO Field I/O Module Type: RTD Resistance Temperature Detector Input Module AAR181-S50 is a 12-channel individually isolated RTD temperature input module for Yokogawa CENTUM VP FIO nodes. It receives 3-wire Pt100 RTD resistance signals from field temperature sensors, converts resistance values into digital temperature data and transmits to the FCS controller over the ESB bus. It supports sensor burnout detection, widely used in petrochemical, power, oil & gas and chemical plants for furnace, pipeline and reactor temperature monitoring. This module supports hot swap and dual redundant configuration.
Technical Specifications
| Item | Parameter |
|---|---|
| Part Number | AAR181-S50 |
| Module Type | RTD Temperature Input Module |
| Applicable System | Yokogawa CENTUM VP FIO node |
| Number of Channels | 12 channels, individually isolated |
| Supported Sensor | Pt100 (3-wire RTD) |
| RTD Measurement Current | 1mA per channel |
| Withstand Voltage | 1500V AC between field side and system side, 1 minute |
| Accuracy | ±120mΩ |
| Data Update Period | 1 second |
| Burnout Detection | Configurable up/down burnout alarm, detection time 60s |
| Redundancy | Dual redundant support |
| Hot Swap | Yes, online replacement |
| Power Consumption | Max 450mA @5VDC |
| Operating Temperature | 0°C ~ +50°C |
| Storage Temperature | -20°C ~ +70°C |
| Humidity | 5~95% RH, non-condensing |
| Weight | Approx 200g |
Engineer Notes
- AAR181-S50 belongs to FIO series I/O module for CENTUM VP, not compatible with old CS3000 system.
- Designed for 3-wire Pt100 RTD sensors; ensure wire resistance balance for each sensor cable to reduce measurement error.
- Supports channel burnout detection to alarm broken RTD sensor or field cable.
- Can be installed as dual redundant pair; automatic switchover upon module fault without interrupting temperature data acquisition.
- Hot-swap function allows module removal and replacement while DCS online, no system shutdown required.
- Use matched Yokogawa terminal block for field wiring; shielded twisted-pair cable recommended for RTD signal wiring.
- Check module LED indicators for power, ESB communication and channel fault status during commissioning and maintenance.
Pre-Shipment Test Protocol
- Power-on self-test and LED status verification
- RTD full range accuracy calibration test with precision resistance simulator
- Sensor burnout detection function verification
- Redundancy switchover simulation test
- Channel isolation & insulation resistance inspection
- Continuity test of internal circuit
- Visual inspection of housing, connectors, label and marking
- Anti-static & shockproof packaging inspection
Buyer FAQ
Q: Is AAR181-S50 new original? A: We supply brand new original Yokogawa units, 12-month warranty, factory test certificate available on request.
Q: What does suffix S50 mean? A: S = standard type; 50 = non-explosion-proof basic version for FIO node.
Q: Can AAR181-S50 work in redundant configuration? A: Yes, two AAR181-S50 modules can be configured as dual redundant pair.
Q: What sensor type does AAR181-S50 support? A: Mainly for 3-wire Pt100 RTD temperature sensors.
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