NFAI543-S50 | Yokogawa | Analog Output Module

Description

The Yokogawa NFAI543-S50, also cataloged as the NFAI543 Analog Output Module, is designed for CENTUM VP and ProSafe-RS systems. It provides isolated analog signal outputs across 16 channels, supporting 4-20 mA transmission with configurable fallback states per channel. The module is rack-mounted and integrates with system backplanes for regulated output control.

Hardware Specifications

• Part Number: NFAI543-S50

• Manufacturer: Yokogawa

• Series: CENTUM VP / ProSafe-RS

• Product Type: Analog Output Module

• Number of Output Channels: 16 isolated channels

• Output Signal: 4-20 mA

• Withstanding Voltage: 1500 V AC for 1 minute (between output and system)

• Allowable Load Resistance: 0 to 750 Ω

• Circuit-Open Detection: 0.65 mA or less

• Accuracy: ±0.3 % of full scale

• Data Refresh Cycle: 10 ms

• Output Step Response Time: 100 ms

• Output Fallback: Configurable per channel

• Temperature Drift: Max. ±0.01 %/deg C

• Current Consumption: 230 mA (5 V DC), 540 mA (24 V DC)

• Weight: 0.4 kg

• External Connection: Pressure clamp terminal, MIL connector cable

• HART Communication: Available

• Suffix Codes:

  • S = Standard Type

  • 5 = With no explosion protection

  • 0 = Basic type

Channel-to-Channel Isolation

The NFAI543-S50 employs channel-to-channel isolation to maintain measurement integrity across multiple outputs. Each channel is independently protected against cross-talk and transient surges. Integration of HART communication allows simultaneous signal transmission and diagnostic data exchange, ensuring compatibility with modern field instrumentation.

Frequently Asked Questions (FAQ)

Q: Can the NFAI543-S50 outputs be configured for fallback states? A: Yes. Each channel supports independent fallback configuration.

Q: What is the typical response time for output changes? A: The module provides a 100 ms step response time with a 10 ms refresh cycle.

Q: Does the module support HART communication? A: Yes. HART protocol is available for enhanced diagnostics and signal integration.

Field Installation Guidelines

• Mount the module securely in the designated rack slot with full connector engagement.

• Use shielded cabling for analog outputs to minimize electromagnetic interference.

• Verify load resistance does not exceed 750 Ω per channel.

• Ensure grounding practices are followed to maintain isolation integrity.

• Confirm ambient temperature and humidity conditions are within specified operating ranges.

• For MIL connector cable installations, verify pin alignment and secure fastening.