AAI835-S00 | Yokogawa | Analog I/O Module

Product Overview

The Yokogawa AAI835-S00 provides a versatile, mixed-signal solution for the CENTUM VP distributed control system. This module combines 4 analog input channels and 4 analog output channels into a single isolated unit, making it ideal for localized control loops or small-scale process monitoring where space is a premium. We supply this module as 100% Brand New and Original equipment.

Part Number Breakdown

• AAI835: Combined Analog Input/Output Module (4-In/4-Out).

• -S: Standard hardware configuration.

• 0: Standard type with explosion protection.

• 0: Basic functional specification.

Technical Specifications

• Input Channels: 4 isolated channels, 4 to 20 mA DC.

• Output Channels: 4 isolated channels, 4 to 20 mA DC.

• Signal Range: Standard 4-20 mA for both acquisition and control.

• Isolation: Full isolation between channels and system logic.

• Connectivity: Supports pressure clamp terminals, MIL connector cables, and KS1 dedicated cables.

• Dimensions: 10.7 cm x 13 cm x 3.3 cm.

Engineering Advantages

The AAI835-S00 solves the problem of under-utilized I/O racks by allowing engineers to handle both sensing and actuation within a single card slot. This "hybrid" approach reduces the total number of modules required for small skids or auxiliary systems, lowering hardware costs. Individual channel isolation ensures that electrical faults in the field do not migrate across the module, maintaining the integrity of both your data and your control signals. Its compact design and compatibility with KS1 cabling streamline the marshaling process and improve cabinet airflow.

FAQs

• When should I choose the AAI835 over separate input and output modules?The AAI835 is the most efficient choice for small, independent control loops (e.g., a single PID loop involving one transmitter and one valve) where using two separate 8-channel cards would result in wasted capacity.

• Does this module support redundancy?Yes, the AAI835 series supports dual-redundant configurations. When installed in pairs, the system ensures continuous operation of both your inputs and outputs in the event of a hardware failure.

• How does it handle field-side noise?The module utilizes 1500V AC isolation between the field circuits and the system backplane, effectively blocking electromagnetic interference (EMI) and preventing ground loops from distorting your 4-20 mA signals.

• Is this compatible with 2-wire transmitters?Yes, you can configure the input channels to interface with 2-wire (loop-powered) or 4-wire transmitters, depending on the wiring and terminal board configuration used in your cabinet.