ALSTOM STO1726KO1 Digital input board card

ALSTOM STO1726KO1 Digital input board card

ALSTOM STO1726KO1 Order Number: 4022.437.1856 Board Card Information
1. Model Code Explanation
Short Model: STO1726KO1
Original Factory Complete Part Number: STO1726KO1
Brand: ALSTOM (Power Industrial Control / Gas Turbine / Power Station Control System)
Product Series: ALSTOM AGATE / ALSPA P320 Power Station Control Series, Specialized Signal Processing Boards for Thermal Power, Gas Turbine, and Hydropower
2. Product Positioning
Mixed Digital Input/Output Signal Board Card, belonging to the auxiliary control of gas turbines and unit interlock measurement and control boards, responsible for on-site switch quantity collection, logic output driving, compatible with Alstom’s old-fashioned cabinet rack card-type hardware.
3. Core Hardware Functions
DI Digital Input Channel
Collects circuit breaker position, valve feedback, limit switch, equipment status passive dry contact signals, with photoelectric isolation, suppressing on-site electromagnetic interference; supports SOE event time sequence recording.
DO Relay Output Channel
Passive contact output, used for solenoid valves, alarm indicator lights, small contactors, unit interlock driving, contacts with overload protection.
Built-in Logic Preprocessing
Local simple logic filtering, anti-jamming, reducing the computing load of the main control CPU; channel failure self-check, failure light local indication and uploading system alarm.

Backplane Bus Communication
Interacts with the main control CPU and analog board card data through the internal parallel bus to achieve measurement point upload and control command issuance.
4. Electrical Specifications
Power Supply: Rack Backplane 24VDC
Operating Temperature: 0℃ ~ +60℃ Cabinet Installation
Isolation Level: Channel-to-ground photoelectric isolation, compatible with power plant strong electromagnetic environment
Structure: European standard card-type, front and rear dual connectors, front terminals wiring, backplane bus
Protection Level: IP20, only for indoor control cabinets
5. Application Scenarios
Combined Cycle Gas Turbine Unit Control System
Auxiliary Control of Thermal Power Plant Steam Turbines and Boiler Auxiliary Machines
Unit Monitoring of Hydropower Stations, Gate Logic Control
Auxiliary Logic Measurement and Control of Substation Bays