Product Description
🔹 General Information
|
Manufacturer |
Yokogawa |
|---|---|
|
Model/Part Number |
NFAI135-S50 |
|
Description |
Analog Current Input Module (8-channel, 4–20 mA, Isolated Channels) |
🔹 Description Summary
The NFAI135-S50 is an 8-channel current input module designed to receive 4 to 20 mA analog signals. Each channel is isolated both from the system and from other channels. This module is ideal for high-integrity analog signal acquisition and supports HART communication (if ordered with the -H suffix, not present in this version).
🔹 Technical Specifications
|
Item |
Specification |
|---|---|
|
Number of Channels |
8-channel input (individually isolated) |
|
Signal Type |
4 to 20 mA (input only) |
|
Allowable Input Current |
25 mA max |
|
Overcurrent Protection |
Provided |
|
Withstanding Voltage |
500 V AC for 1 minute (input-to-system and channel-to-channel) |
|
Input Resistance |
250 Ω (when powered ON) ≥500 kΩ (when powered OFF) |
|
Accuracy |
±0.1% of full scale |
|
Data Refresh Cycle |
10 ms |
|
Step Response Time |
100 ms (input) |
|
Transmitter Power Supply |
20.2 to 29.3 V DC |
|
Temperature Drift |
Max. ±0.01% / °C |
|
Maximum Current Consumption |
360 mA (5 V DC) 450 mA (24 V DC) |
|
Weight |
Approx. 0.3 kg |
|
External Connection |
Pressure clamp terminal, MIL connector cable |
|
HART Communication |
Not available in this specific configuration (-S50 suffix only) |
🔹 Model and Suffix Code Breakdown
|
Model |
NFAI135 – 8-channel Analog Input Module (4 to 20 mA, Isolated Channels) |
|---|---|
|
-S |
Standard type |
|
5 |
No explosion protection |
|
0 |
Basic configuration without ISA G3/environmental options |
🔹 Optional Accessories
|
Option Code |
Description |
|---|---|
|
/13S00 |
Pressure Clamp Terminal Block for Isolated Analog [Model: NFTI3S-00] |
|
/13S10 |
Pressure Clamp Terminal Block with Surge Absorber [Model: NFTI3S-10] |
|
/CCC01 |
Connector Cover for MIL Cable [Model: NFCCC01] |
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