Product Description
🔹 General Information
|
Manufacturer |
Yokogawa |
|---|---|
|
Model/Part Number |
NFAR181-S50/R8S10 |
|
Description |
RTD Input Module (12-channel, Isolated Channels) |
🔹 Description Summary
The NFAR181-S50 module is a 12-channel RTD input module, supporting Pt100 and JPt100 RTD sensors in a three-wire configuration. Each channel is isolated from the system and from other channels. This model version includes the /R8S10 option, which equips it with a pressure clamp terminal block featuring a surge absorber, improving protection in industrial environments.
🔹 Technical Specifications
|
Item |
Specification |
|---|---|
|
Model |
NFAR181 |
|
Input Channels |
12 isolated input channels |
|
Input Signal Type |
RTD (Pt100, JPt100; three-wire type) |
|
Standards Supported |
JIS C 1604:1989, IEC 60751:1986 |
|
Allowable Input Voltage |
±5 V |
|
Withstanding Voltage |
1500 V AC for 1 minute (input-to-system) |
|
Input Resistance |
≥2 MΩ (Power ON or OFF) |
|
Measurement Current |
1 mA |
|
Accuracy (RTD Inputs) |
±0.03% of full scale (for 0 to 400 Ω) |
|
Allowable Wiring Resistance |
≤40 Ω per wire |
|
Temperature Drift |
Max. ±30 ppm/°C |
|
Data Refresh Cycle |
1 second |
|
Burn-Out Detection |
Selectable (UP/DOWN), Detection Time: 60 seconds |
|
Maximum Current Consumption |
450 mA (5 V DC) |
|
Weight |
0.2 kg |
|
External Connections |
Pressure clamp terminal block (surge absorber included via option /R8S10) |
🔹 Model and Suffix Code Breakdown
|
Model |
NFAR181 – RTD Input Module (12-channel, Isolated) |
|---|---|
|
-S |
Standard type |
|
5 |
Without explosion protection |
|
0 |
Basic type configuration |
|
/R8S10 |
Pressure Clamp Terminal Block with Surge Absorber [NFTR8S-10] |