AAI135-H00 Yokogawa Analog Input Module | New & Original Stock

Yokogawa AAI135-H00 Analog Input Module

The Yokogawa AAI135-H00, also cataloged as the AAI135 Analog Input Module, operates as a dedicated hardware component for multi-channel current signal acquisition within CENTUM VP, ProSafe-RS, and FIO architecture platforms. The module samples analog current signals directly from field transmitters, executing analog-to-digital conversion and digital instrumentation diagnostics across individual isolated hardware channels.

Suffix Breakdown & Model Matrix

• AAI135: Base model designation for Analog Input Module (4 to 20 mA, 8-channel, Isolated channels).
• -H: Integrated digital communication capability conforming to the HART loop protocol.
• 00: Basic hardware type with standard environmental and system configurations.
• /K4A00: Optional integrated KS Cable Interface Adapter intended for physical mating with ATK4A-00 / AEA4D terminal assemblies.

Hardware Specifications

Process Control & DCS Instrumentation Properties

The architecture implements dedicated channel-to-channel isolation barriers designed to completely suppress common-mode electrical noise and ground loop circulation across individual sensor paths. Built-in frequency-shift keying (FSK) line modems enable concurrent 4-20 mA HART loop protocol pass-through communication, allowing configuration and real-time device diagnostics without disturbing the underlying analog variables. Integrated digital circuit diagnostics monitor the loops continuously to flag out-of-range thresholds, short circuits, or open-circuit states directly to the backplane network registry.

Frequently Asked Questions

Q: What is the mechanical electrical behavior of the input channels when backplane power is disconnected?

A: When power is OFF, the input impedance switches to a high resistance state of 500 kOhm or larger. This isolates the field transmitter loops and prevents a powered-down module from loading down the remaining active external hardware connections.

Q: How is hot-swap maintenance performed on this specific physical hardware?

A: The module supports live hot-swap replacement directly on the FIO base unit. Live replacement can be conducted without cutting loop power or disturbing the active operations of adjacent I/O modules on the same node.

Q: What physical interfaces are required to route signals via the /K4A00 adapter?

A: The /K4A00 suffix provides a factory-fitted KS Cable Interface Adapter block. It converts the proprietary card-edge connector pins into an interface compatible with standard ATK4A-00 cables for direct termination into external AEA4D boards.

Field Installation Guidelines

• Module Interlocking: Align the card guides and push the module into the active slot on the FIO base unit until the plastic latches click into place. Confirm that the bus connector fully mates with the backplane plane.
• Cable Strain Relief: Connect field cables via the K4A00 interface block using genuine pre-fabricated KS1 or ATK4A cables. Secure the physical wiring harness using external cable clamps to prevent structural strain on the terminal pins.
• Shield Grounding Matrix: Ground instrument twisted-pair cable shields at a single point inside the marshalling cabinet system ground bar. Do not apply grounds at both ends of the shield to eliminate circulating ground currents.
• Thermal Management: Maintain standard vertical clearance below and above the FIO base unit assembly to allow unobstructed ambient convection cooling across the housing vents.