Description

Yokogawa ASI133-S00 Analog Input Module

Configured for signal acquisition in CENTUM VP I/O subsystem, the Yokogawa ASI133-S00/SA3S0j8-channel (ASI133-S00 Analog Input Module) provides direct physical/electrical execution for 4-20 mA current loop acquisition within FIO-based distributed input architecture. The module implements multi-channel analog conversion with galvanically isolated input paths and terminal-based field termination.

Suffix Breakdown & Model Matrix

No explicit structured suffix decomposition is defined in the provided reference data. The model designation is treated as a single ordering and configuration identifier:

• ASI133-S00: Base module type
• SA3S0j8-channel: Terminal and channel configuration reference (as provided)

Hardware Specifications

Parameter	Specification
ModelBrand	Yokogawa ASI133-S00
Origin	Japan (Yokogawa Electric Corporation)
Weight	Approx. 0.30 kg
Dimensions	13.3 cm x 14.6 cm x 3.2 cm
OperatingTemp	Not explicitly specified in source data
PowerConsumption	150 mA @ 5 VDC / 450 mA @ 24 VDC
Channels	8 channel analog input
Input Signal	4-20 mA DC current
Isolation	Channel-to-system isolated input design
Terminal Block	ATSA3S pressure clamp type

Yokogawa DCS Analog Loop Acquisition Characteristics

The ASI133-S00 operates as a field input acquisition node within Yokogawa CENTUM VP / FIO architecture, implementing 4-20 mA loop interfacing with built-in isolation per channel group. The input stage is designed for direct termination of 2-wire transmitter loops using INx.1 / INx.2 terminals with GND reference bonding. Signal conditioning supports stable current loop conversion with defined input resistance scaling under energized and de-energized states, ensuring predictable loop impedance behavior across field wiring variations.

HART-capable loop compatibility enables bidirectional digital overlay communication over the 4-20 mA carrier, allowing field device diagnostics and parameter access without external multiplexing hardware. Channel isolation structure suppresses cross-channel interference during simultaneous sampling in multi-loop configurations.

Frequently Asked Questions

Q: Can the module support hot-swap replacement under energized backplane conditions?
A: Hot-swap behavior depends on CENTUM VP subsystem configuration. Electrical isolation is maintained per channel, but backplane removal must follow system-defined maintenance sequencing.

Q: Does each channel provide independent isolation?
A: The module implements isolated input architecture to reduce channel interaction and protect against field-side potential differences.

Q: Is external signal conditioning required for 4-20 mA loops?
A: No external conversion is required. The module directly accepts 4-20 mA inputs via terminal block interface.

Field Installation Guidelines

• Use ATSA3S terminal block with correct pressure clamp termination to ensure stable loop impedance contact.
• Maintain shield grounding at a single-point earth reference to avoid ground loop current injection.
• Separate analog input wiring from high-voltage or switching conductors to reduce induced noise coupling.
• Observe polarity on INx.1 (positive) and INx.2 (negative) for each channel loop.
• Ensure loop power budget supports transmitter compliance voltage under full-scale 20 mA conditions.
• Apply proper isolation testing procedures before energizing field circuits in hazardous area installations.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems