The Yokogawa SAI143-H53/PRP is a high-reliability 16-channel analog input module designed for ProSafe-RS safety instrumented systems. It supports 4 to 20 mA signals and integrates HART 7 communication for advanced device diagnostics. Each channel offers galvanic isolation, enhancing system safety and fault tolerance. The module includes a false insertion prevention pin with option code /PRP, ensuring correct installation in critical safety applications. Furthermore, it supports dual-redundant configurations, minimizing single-point failures and increasing operational uptime.

Input Specifications

• Number of Channels: 16 isolated input channels
• Rated Input Range: 4 to 20 mA DC
• Permissible Input Range: 0 to 25 mA
• Accuracy: ±16 µA (input range 0.05 to 23 mA)
• Input Impedance (Power ON): 250 Ω + voltage drop (varies with current)
• Input Impedance (Power OFF): ≥500 kΩ
• Voltage Drop: Max 0.45 V
• Data Update Frequency: 40 ms
• Temperature Drift: ±16 µA / 10 °C

Transmitter Power Supply

• Output Voltage Range: 16.15 V (min, 20 mA) to 26.4 V (max, 0 mA)
• Output Current Limit: 25 mA
• 2/4-Wire Setting: Configurable per channel via setting pins
• Power ON/OFF Function: Available for all channels in 2-wire mode

Electrical Characteristics

• Withstand Voltage: 1.5 kV AC (between input signal and system for 1 minute)
• Max Current Consumption:
  • 320 mA (5 V system)
  • 550 mA (24 V system)

Communication

• Protocol: HART 7 supported

Mechanical & Installation

• Weight: 0.39 kg
• Mounting: DIN rail or rack mount
• Hot-Swappable: Yes
• External Connections:
  • Pressure clamp terminal
  • MIL connector cable
  • Dedicated signal cable (KS1)
• False Insertion Prevention: Yes (with /PRP option)

Environmental Ratings

• Operating Temperature: -20°C to +70°C
• Protection Rating: IP20
• Environmental Standard: ISA G3 (harsh environments)