SAI143-H33 | Yokogawa | 16-Channel Isolated Analog Input Module with Transmitter Power

Product Description

The SAI143-H33 from Yokogawa is a high‑precision analog input module designed for advanced process control applications. It provides 16 isolated input channels with flexible transmitter power supply management, making it suitable for integration into distributed control systems where accuracy and reliability are critical.

This module supports 4–20 mA DC current loop signals with a permissible input range up to 25 mA. Each channel is galvanically isolated, ensuring protection against ground loops and electrical noise. The SAI143-H33 also offers configurable transmitter power supply settings, enabling simultaneous ON/OFF control across all channels in two‑wire mode.

Technical Specifications

• Model / Order Number: SAI143-H33

• Manufacturer: Yokogawa Electric Corporation

• Type: Analog Input Module

• Channels: 16 isolated inputs

• Rated Input Range: 4–20 mA

• Permissible Input Range: 0–25 mA

• Input Impedance (Power ON): 250 Ω + current value (≈272.5 Ω at 20 mA, ≈362.5 Ω at 4 mA)

• Input Impedance (Power OFF): ≥500 kΩ

• Accuracy: ±16 µA (0.05–23 mA input range)

• Data Update Frequency: 40 ms

• Temperature Drift: ±16 µA per 10°C

• Transmitter Power Supply:

• Minimum 16.15 V at 20 mA

• Maximum 26.4 V at 0 mA

• Output current limit: 25 mA

• Individual channel setting available

• ON/OFF control for all 16 channels in 2‑wire mode

• Isolation Voltage: 1.5 kV AC (input to system, 1 minute)

• Current Consumption: 320 mA (5 V system), 550 mA (24 V system)

• Weight: Approx. 0.34 kg (pressure clamp terminal or MIL cable), 0.39 kg (with signal cable adapter)

• External Connections: Pressure clamp terminal, MIL cable, dedicated signal cable

• Operating Temperature: -20°C to +70°C

Application Scenarios

• High‑accuracy transmitter integration in process industries

• Distributed control systems requiring isolated analog inputs

• Environments with wide operating temperature ranges

FAQ

Q: How many channels does the SAI143-H33 support?  A: It supports 16 isolated analog input channels.

Q: Does the module provide transmitter power supply control?  A: Yes, it allows individual channel settings and simultaneous ON/OFF control in 2‑wire mode.

Q: What is the accuracy of the SAI143-H33?  A: ±16 µA within the 0.05–23 mA input range.