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Configured for high-density signal acquisition in STARDOM FCN/FCJ autonomous controller platforms, the Yokogawa NFAI135-S50 (NFAI135 Analog Input Module) provides direct electrical execution for 8-channel analog current loops. This module facilitates precise conversion of 4-20 mA inputs while maintaining galvanic integrity between signal channels and the internal system backplane to prevent common-mode noise propagation.
| Suffix Code | Specification |
|---|---|
| NFAI135 | Base Analog Input Module (8-channel) |
| -S50 | Standard version with specific wiring interface |
| /CCC01 | Included MIL connector cable with protective cover |
| Parameter | Specification |
|---|---|
| Model | NFAI135-S50 |
| Brand | Yokogawa |
| Origin | Japan |
| Weight | 0.3 kg |
| Dimensions | Standard FCN/FCJ module form factor |
| Operating Temp | -10 deg C to +60 deg C |
| Power Consumption | 360 mA (5 V DC), 450 mA (24 V DC) |
| Input Channels | 8 (individually isolated) |
| Input Signal | 4-20 mA |
| Accuracy | +/- 0.1% of full scale |
| Data Refresh | 10 ms |
The NFAI135-S50 utilizes galvanic isolation to provide a 500 V AC withstand voltage rating between individual channels and between channels and the system bus. This architecture effectively suppresses ground loops in large-scale installations. The module supports loop-powered transmitters, delivering a supply voltage of 20.2 to 29.3 V DC with a current limit of 25 mA per channel. With a temperature drift specification of 0.01% per deg C, the module ensures measurement stability in varying ambient industrial conditions.
Q: Does the NFAI135-S50 support hot-swapping while the STARDOM controller is in operation?
A: No, module removal must be performed while the power supply to the specific base unit is disconnected to prevent potential electrical arcing or system bus communication errors.
Q: What is the behavior of the input resistance when the module power is removed?
A: When power is OFF, the input resistance transitions to a high-impedance state of at least 500 kOhm, effectively isolating the field loop from the module circuitry.