ST5-A Yokogawa Multipoint Status I/O Card

ST5-A Yokogawa Multipoint Status I/O Card | New & Original Stock

Availability: 99 left in stock

Yokogawa ST5*A CENTUM Series Multipoint Status I/O Card The Yokogawa ST5*A, also cataloged as the Yokogawa ST5-A Multipoint Status I/O...

SKU: ST5*A

Manufacturer: Yokogawa
Product No.: ST5*A
Product Type: Digital Input/Output Modules
Product Origin: JAPAN
Payment:T/T, Western Union
Weight: 500g
Shipping port: Xiamen
Warranty: 12 months

Description Reviews

Yokogawa ST5*A CENTUM Series Multipoint Status I/O Card

The Yokogawa ST5*A, also cataloged as the Yokogawa ST5-A Multipoint Status I/O Card (ASS9771AJ-0), operates as a dedicated hardware component for digital status acquisition and multi-point signal routing within CENTUM VP, CENTUM XL, and u-XL network architectures.

Hardware Specifications

Parameter	Specification
Model	ST5*A (ST5-A / ASS9771AJ-0)
Brand	Yokogawa
Origin	United States
Weight	0.5 kg (Module baseline; package configurations list up to 1.36 kg)
Dimensions	220 mm x 210 mm x 80 mm (Alternative package envelope: 2.5 cm x 17.8 cm x 35.6 cm)
Operating Temp	-10 to +55 deg C (Extended environment thresholds up to -20 to +85 deg C)
Power Consumption	24 VDC +-10% Nominal (Accepts 12 to 36 VDC or nest-driven AC supply options)
Module Type	Multipoint Status Input Card / Digital Input Module
Input Configuration	Multiple isolated digital input points (Dry contact or voltage input DC)
Signal Capacity	16 Analog Input Channels (4-20 mA) and 8 Digital Input/Output Channels (Configuration dependent)
Operational Voltage Envelope	24 VDC Nominal (Operates within 18-30 VDC thresholds)
Galvanic Isolation	Channel-to-channel and channel-to-system electrical separation
Response Time	< 10 ms typical
Mounting Form Factors	Compatible with horizontal (RYH-32) and vertical (RYV-11) nests
Interconnection Interface	Block connector cable and RS-485 communication link
Operating Humidity	5% to 95% RH, non-condensing

Process Control & DCS Instrumentation Properties

The Yokogawa ST5*A utilizes continuous channel-to-channel galvanic isolation circuits to suppress ground loop currents and prevent external electrical transient spikes from impacting central backplane logic processors. The multi-point layout translates field states through a flexible processing interface, running digital dry contact monitoring or voltage-driven state detection alongside dedicated 4-20 mA tracking loops. Built-in signal processing microcircuits maintain an operational execution response latency under 10 ms, supporting deterministic data updates over integrated RS-485 communication paths.

Frequently Asked Questions

Q: How does the interface architecture accommodate both AC and DC power distribution schedules?

A: The module does not use a singular fixed power intake layout; instead, its electrical characteristics adapt directly to the host nest hardware. When fitted into an RYH-32 or RYV-11 enclosure, the card relies on the integrated backplane bus bars to receive either 24 VDC or specified AC source lines.

Q: What precautions must be taken concerning the legacy status and obsolescence of this board assembly?

A: Because this hardware interfaces with legacy system components (such as CENTUM XL and u-XL configurations), the backplane connection links must be inspected for physical contact degradation. Replacement routines require exact part number matching (such as suffix ASS9771AJ-0) to maintain system firmware compatibility.

Q: What is the isolation threshold between the discrete field circuits and the internal logic processing core?

A: The board features complete physical and inductive galvanic isolation across all discrete and analog tracking pathways. This prevents common-mode voltage offsets on one field contact from corrupting adjacent channels or damaging the core communication processors.

Field Installation Guidelines

Chassis Nest Insertion: Guide the PC board assembly straight along the horizontal RYH-32 or vertical RYV-11 nest tracks. Push the module back until the rear block connectors sit flush against the backplane terminal cluster, then secure all local locking clips.
Shield Ground Separation: Conductor shielding elements must be tied directly to the central instrumentation ground bar at the cabinet entry point. Do not bridge the shield braid at the field instrument side to prevent high-frequency loop current induction.
Input State Wiring Isolation: Separate the low-voltage discrete status lines, RS-485 links, and 4-20 mA sensor paths from any high-voltage AC utility loops or heavy inductive motor switching feeders within the local wire ducts by at least 15 cm.
Contact Maintenance Protocol: Execute periodic electrical continuity checks on all input dry contacts. Oxide scaling or physical contamination at the field terminal strip can introduce stray loop resistance, causing the module to register incorrect state diagnostics during the 10 ms scan cycle.

What's clients say about us

Excellent Emergency Support!

Our production line was down due to a faulty Bently Nevada monitor. We found it in stock here and they shipped it via DHL immediately. Back in operation within 48 hours—truly a lifesaver for our plant.

Mark Thompson

Maintenance Manager, USA

Reliable Source for New Spares

Finding brand new, original modules is critical for our safety. This team delivers factory-fresh components with full certification. Their commitment to only selling new products makes them our most trusted partner.

Robert Hoffmann

Engineering Lead, Germany

Top-tier Service and Quality

We have sourced Honeywell and Schneider parts here for two years. Every shipment arrives well-packaged with original factory seals intact. Clear communication and the best lead times in the industry.