AAI835-S50 | Yokogawa | Analog I/O Modules

Product Overview

The Yokogawa AAI835-S50 provides a compact, mixed-signal solution for the CENTUM VP distributed control system. This module features 4 analog input channels and 4 analog output channels, all utilizing 4 to 20 mA signals. By combining sensing and actuation in a single unit, it optimizes rack space for localized control loops. We supply this module as 100% Brand New and Original equipment.

Part Number Breakdown

• AAI835: Combined Analog I/O Module (4-channel Input / 4-channel Output).

• -S: Standard hardware configuration.

• 5: Non-explosion protection design.

• 0: Basic functional type.

Technical Specifications

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

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

• Power Requirements: 360 mA at 5 V DC and 450 mA at 24 V DC.

• Isolation: Individual channel isolation for all inputs and outputs.

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

• Physical Profile: 10.7 cm x 13 cm x 3.3 cm; 0.3 kg net weight.

Engineering Advantages

The AAI835-S50 eliminates hardware waste in small-scale applications by merging input and output functions into one card slot. This hybrid design is perfect for auxiliary skids or specific PID loops requiring a single transmitter and valve pair. Each channel remains fully isolated, preventing ground loops and ensuring that a field-side electrical fault on an output does not interfere with your input data. Its compatibility with the KS1 cable system allows for standardized, "plug-and-play" connections to terminal boards, which significantly speeds up cabinet assembly and minimizes the risk of wiring errors.

FAQs

• When should I choose the AAI835-S50 over separate I/O cards?Use this module when you have a low point count but need both input and output capabilities. It saves the cost and space of installing one 8-channel input card and one 8-channel output card for a small task.

• Does this module support dual-redundant operation?Yes. You can install the AAI835-S50 in a redundant configuration. If the primary module fails, the system automatically switches to the secondary unit to maintain continuous monitoring and control.

• What is the significance of the "-S50" suffix?The "S5" indicates it is a standard type without explosion protection, and the "0" confirms it is the basic hardware version. This makes it a cost-effective choice for safe-zone control cabinets.

• Can I mix 2-wire and 4-wire transmitters on the input side?The module handles 4-20 mA signals; the ability to mix transmitter types depends on your terminal board wiring and how you distribute loop power to the field devices.