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Norwegian ST standard interface module

Fiber optic splice closure knowledge brief Published 11 Jul 2023

Prepared for preliminary research by the RIVO OPTICAL knowledge desk. Confirm cable count, splice capacity, sealing class, tray layout, protection sleeves and installation requirements against current standards and product documentation.

The Norwegian ST standard interface module refers to the SIMATIC ET 200SP IM 155-6 PN ST, a PROFINET-compatible I/O interface module for industrial automation.Overview

The ST interface module is designed for connecting distributed I/O modules to a PLC via PROFINET, supporting up to 32 I/O modules per connection. It enables seamless communication between field devices and control systems, facilitating efficient data exchange and control in industrial environments .

Key Features
  • Supply Voltage: 19.2 – 28.8 V DC
  • I/O Capacity: Maximum address volume per module is 288 bytes, with up to 1440 bytes per station
  • Communication: Supports PROFINET IO, Industrial Ethernet (Open IE), and Media Redundancy Protocol (MRP)
  • Real-Time Performance: Isochronous real-time communication (IRT) with a minimum cycle time of 250 µs
  • Diagnostics: LED indicators for module errors and status, supporting identification data I&M 0 to 4
  • Hot Swapping: Modules can be exchanged under power without system downtime
  • Fail-Safe Support: Compatible with safety modules and multiple PLC access (MSI/MSO)
  • Environmental Range: Horizontal installation: -30 to 60 °C; Vertical installation: -30 to 50 °C
  • Protection Class: IP65/67 for system expansion with ET 200AL modules
Applications

The ST interface module is widely used in industrial automation, including:

  • Factory automation and process control
  • Distributed I/O systems requiring high-speed communication
  • Systems needing multi-controller access and fail-safe operation
  • Environments with harsh conditions, thanks to its wide temperature range and IP-rated protection
Additional Information

Interface modules like the ST module act as intermediaries between sensors, actuators, and PLCs, converting analog or digital signals into formats suitable for control systems. They are critical for ensuring reliable, flexible, and efficient automation processes . Authorized distributors in Norway, such as Mouser Electronics, provide datasheets, inventory, and technical support for these modules . For detailed specifications, planning, and procurement, the Norwegian Standards catalog and Siemens product documentation can be consulted .

Norwegian ST standard interface module - RIVO MULTITRADE OPTICAL SYSTEMS [PDF]

Norwegian ST standard interface module

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Technical note

This reference is intended for preliminary fiber optic splice closure research. Compatibility, splice capacity, sealing class, tray layout, protection sleeves, installation methods, test limits and applicable standards must be verified for the specific project.

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