ALSTOM STO1726KO1 plug-in 16-channel digital output board, spare I/O module for Alspa 80-40 / C80-35 industrial control and power plant automation rack systems.

Product Overview

• Part No: STO1726KO1
• Brand: ALSTOM

• Category: 16-Channel Digital Output ModuleSTO1726KO1 is a rack plug-in digital output module of ALSTOM Alspa 80-40 / Alspa C80-35 control system. It receives logic commands from main controller via backplane bus and converts internal control signals into field drive signals for solenoid valves, auxiliary relays, alarm indicators and local actuators.Each channel adopts transistor NPN open-collector output with independent overcurrent and short-circuit protection. Built-in signal filtering and isolation circuits suppress EMI interference in industrial sites. It belongs to discontinued original spare, widely used for overhaul of thermal power, industrial captive power plant DCS and turbine auxiliary control racks.

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Core Features

• 16-channel isolated digital output, NPN open collector type
• Per-channel short-circuit, overcurrent hardware protection
• Front panel LED indicators for channel status and module fault diagnosis
• Standard Eurocard plug-in design, supports rapid on-site replacement
• Reinforced PCB with anti-vibration construction, suitable for power station environment
• ESD and transient surge protection, compliant with industrial EMC requirements

• Passed vibration, temperature cycling and electromagnetic compatibility reliability testing

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Technical Specifications

• Operating Supply: 24 VDC
• Single channel rated output: 0.5A
• Operating Temperature: -10°C ~ +60°C
• Storage Temperature: -40°C ~ +85°C
• Form Factor: Standard rack plug-in printed circuit board

• Protection Class: IP20 when installed inside control cabinet

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Compatibility & Application

• Compatible with ALSTOM Alspa 80-40, Alspa C80-35 control rack architecture
• Widely deployed in thermal power plants, industrial process automation and auxiliary turbine control systems
• Application: equipment start/stop command output, interlock control, fault alarm driving, auxiliary actuator logic control