Input Channels:32
Output Channels:16(Relays)
Input Voltage:125V DC(Maximum)
Mounting Location:Mark VIe I/O Rack
Insulation Rating:IP20
Technical Specifications
Product Model:DS200TCDAH1B
Manufacturer:General Electric(GE)
Product Type:Mark VIe Digital Input/Output Module
Series:Mark VIe Gas Turbine/Steam Turbine Control System
Function:Mixed I/O
Digital Input(DI)Section:
Number of Channels:32
Input Type:Dry Contact or Wetted Contact
Voltage Range:Supports up to 125V DC(See the manual for specific thresholds;typically,>60V is 1 and<30V is 0)
Isolation:Group-to-Ground Isolation
Diagnostics:Supports input open/short detection(for active inputs)
Digital Output(DO)
Number of Channels:16
Output Type:Electromechanical Relay
Contact Type:Single-Pole Double Throw(SPDT)-includes Normally Open(NO)and Normally Closed(NC)contacts
Contact Rating:Typically 5A 125V AC/DC(check the manual for specific values,e.g.,2A 250VAC,2A 30VDC)
Isolation:Channel-to-channel and channel-to-earth ground isolation
Diagnostics:Supports output channel status feedback and short/open detection(via feedback loop)
Power Supply:Powered by the Mark VIe chassis backplane bus(typically+5V,+3.3V)
Operating Temperature:0°C to 55°C(32°F to 131°F)
Storage Temperature:-40°C to 85°C(-40°F to 185°F)
Relative Humidity:5%to 95%RH,non-condensing
Mounting Method:Standard 3U Eurocard(100mm x 160mm)plugs into the Mark VIe I/O rack
Connection Method:Field cables are connected via a terminal board or field terminal unit(FTU).The module itself connects to the rack bus via the backplane.
Indicators:Front panel LEDs indicate power(PWR),run(RUN),fault(FLT),and individual I/O channel status.
Weight:Approximately 0.7 kg
Certifications:CE,UL,CSA(for industrial environments)
Product Overview
The DS200TCDAH1B is the”hands,feet,and ears”of the GE Mark VIe control system.This hybrid digital I/O module integrates 32 digital inputs(DIs)and 16 relay outputs(DOs).It serves as a critical bridge between the control system’s”brain”(CPU)and the field”world”(sensors and actuators).
Its”eyes and ears”(32 DIs)are responsible for sensing.They can read various switch status signals from the field,such as:
E-stop button pressed/reset status
Limit switch indication of valve fully open/closed
Pressure switch and temperature switch alarm/normal status
Relay auxiliary contacts provide feedback on motor and pump running/stop status
Circuit breaker position signal
These signals are connected to the DS200TCDAH1B input channels via the terminal block.The module’s internal circuitry detects whether the contacts are closed or open and transmits this status information via the Mark VIe’s TURBO BUS or I/O bus to the master controller(such as the TCEC)for use in the control logic.
Its”hands and feet”(16 relay outputs)are responsible for execution.When control logic(such as an interlocking program)determines that an action is required,it commands one of the DS200TCDAH1B’s relay output channels to close or open.These relay contacts can be used to:
Start/stop motors,pumps,and fans
Open/close solenoid valves and pneumatic valves
Trigger alarm lights and buzzers
Send commands to other control systems or devices
The advantages of relay outputs include strong electrical isolation,high drive capability(capable of directly driving medium-power loads such as small contactor coils),and flexible contact configuration(SPDT)to accommodate various wiring requirements.
The DS200TCDAH1B is designed for high-reliability industrial environments.It is hot-swappable,meaning that a faulty module can be replaced while the Mark VIe system is running without disrupting overall system control(assuming redundant configuration or non-critical circuits).Both input and output channels are isolated,effectively resisting field electrical noise and ground loop interference.Front-panel LEDs clearly indicate module and channel status in real time,facilitating quick diagnostics.It is the indispensable hardware foundation for implementing functions such as gas turbine start-up and shutdown,protective interlocks,and sequential control.
Key Features and Benefits
The DS200TCDAH1B perfectly embodies the industrial I/O design philosophy of”integration,reliability,and flexibility.”
“Integration”refers to efficiency.Integrating 32 DI channels and 16 DO channels on a standard Eurocard significantly improves rack space utilization,reduces the number of modules and wiring complexity,and lowers system cost and maintenance.This hybrid module is an ideal choice for applications requiring a large number of discrete I/Os.
“Reliability”is crucial.Although electromechanical relays have limited mechanical lifespans,their contact isolation,high voltage resistance,and strong anti-interference properties make them extremely reliable when driving inductive loads(such as motors and solenoid valves)and in harsh electromagnetic environments.Channel isolation prevents fault propagation between channels.Hot-swappable support significantly enhances system maintainability and availability.GE’s original design ensures seamless compatibility and long-term stability with the Mark VIe system.
“Flexibility”refers to adaptability.The 32-channel DIs accommodate a variety of field signal types(dry or active contacts,supporting up to 125VDC),ensuring high compatibility.The SPDT contacts of the 16 relay outputs provide maximum wiring flexibility,allowing them to be used as normally open,normally closed,or for changeover functions.Module configuration(such as alarm thresholds and diagnostic sensitivity)can be configured using the Mark VIe configuration software.
The GE DS200TCDAH1B is a versatile mixed digital input/output(I/O)module for the Mark VIe turbine control system.It combines 32 channels of digital input(DI)for monitoring field status(e.g.,limit switches,emergency stops,relay contacts)with 16 channels of robust electromechanical relay outputs(DO)for directly commanding actuators(e.g.,solenoid valves,motor starters,alarm horns).This integration of sensing and actuation functions on a single card optimizes rack space and simplifies system design.Designed for high reliability in demanding power generation environments,the DS200TCDAH1B features channel isolation,comprehensive diagnostics,and hot-swap capability,allowing maintenance without shutting down the turbine.Its ability to handle high-voltage DC inputs(up to 125V)and drive substantial loads via SPDT relay contacts makes it a critical and flexible component for implementing safety interlocks,sequence control,and operational commands within gas and steam turbine applications,ensuring precise and dependable systems response.
Application Areas
The DS200TCDAH1B’s application areas are identical to those of the Mark VIe control system and are widely used in the following:
Gas Turbines:Used for unit start/shutdown sequence control,fuel valve control,cooling fan control,protective interlocks(such as high vibration and high temperature shutdown interlocks),and auxiliary equipment status monitoring.
Steam Turbines:Used for control of extraction steam,steam traps,lubricating oil pumps,and jacking oil pumps,as well as status feedback.
Combined Cycle Power Plants:Also suitable for control of heat recovery steam generators(HRSGs)and steam turbines.
Industrial Drive Systems:Gas turbine control systems for driving large compressors and pumps.
Combined Heat and Power(CHP)projects.Wherever logic analysis,status monitoring,and equipment control are required using digital signals,the DS200TCDAH1B is a versatile tool for these tasks.
Selection Guide/Purchasing Recommendations
When choosing the DS200TCDAH1B,be sure to choose it accurately.First,ensure an exact model match.Confirm it’s the DS200TCDAH1B and check the hardware revision(revision)for compatibility with the existing system.GE may offer alternative models with similar functionality(such as the TCDAH2B),so verify interchangeability.Second,ensure genuine parts.I/O module isolation,relay life,and diagnostics are crucial,and non-genuine spare parts carry a high risk.Third,confirm I/O requirements.Determine whether the site requires 32 inputs and 16 relay outputs.Consider whether the relay contact ratings are sufficient to drive your load(e.g.,contactor coil current).Fourth,ensure terminal board/FTU compatibility.Ensure you have the matching terminal board or field terminal unit(FTU)to connect field cables.Fifth,consider your spare parts strategy.For critical control circuits(such as emergency stop and fuel shutoff),it’s recommended to have a DS200TCDAH1B on hand.Sixth,consider technical support.After replacement,it is recommended that an engineer check whether the I/O channel status is normal through the HMI or ToolboxST software.
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