Yokogawa|AAI835-S50|Analog I/O Module

Description

Features

• 4 isolated input channels and 4 isolated output channels for 4–20 mA signals
• Supports dual-redundant configuration via terminal blocks
• Configurable input types: 2-wire transmitter (with power) or 4-wire transmitter (without power)
• Direct connection via pressure clamp terminals, MIL cable, or Yokogawa-specific cables

Technical Specifications

Module Overview

• Model: AAI835-S50
• Channels: 4 input / 4 output (isolated channels)
• Signal Range: 4 to 20 mA (input/output)
• Isolation: Channel-level isolation for noise immunity

Connection Types

• Pressure Clamp Terminals
  • Cable Thickness: 0.5–2 mm² (AWG20–14) unsleeved; 0.5–1.5 mm² (AWG20–16) sleeved
  • Peel-off Length: 11 mm for unsleeved cables
• MIL Cable: 40-pin connector with CBSE terminals for disconnection detection
• Terminal Blocks
  • Single: ATI3S, ATK4A, ATB3A
  • Dual-redundant: ATI3D, AEA4D, AEA3D
  • Cable: KS1 (Yokogawa-specific)

Input/Output Configuration

• Input Channels
  • INA: 2-wire transmitter positive
  • INB: 2-wire transmitter negative / 4-wire current positive
  • INC: 4-wire current negative (configurable per channel)
• Output Channels: OUT+/- (4–20 mA isolated output)
• Power Failure: Input loops open during power off/abnormality