Description
CCC IOC-555-D I7-550555-001 REV.L
Technical Specifications
- Product Type: Turbomachinery control IOC plug-in card
- Signal Type: Analog input, analog output, digital input, digital output
- Backplane Interface: CCC control rack internal high speed bus
- Revision: REV.L
- Mounting: Plug-in slot installation inside CCC control rack
- Protection Rating: IP00 for bare card, IP20 in cabinet
- Operating Temperature: 0 °C to +60 °C
- Humidity: 5 % to 90 %, non-condensing
- Weight: 0.62 kg
Functional Features
- Multi-type I/O signal acquisition and output for turbomachinery control system.
- High speed bus communication exchanges process data and command with main turbine processor.
- Signal fault detection identifies open circuit, short circuit and overrange for analog channels.
- Galvanic isolation protects rack backplane from field surge and noise interference.
- Hardware interlock logic supports fast safety trip signal transmission.
- Onboard non-volatile memory stores channel configuration and calibration parameters.
- Front panel LED indicators show channel status, power and communication fault.
- Hot swap capability for replacement during planned machine shutdown.
- Conformal coating protects PCB against moisture and airborne contaminants.
- Continuous self-test verifies circuit integrity during normal operation.
Application Scenarios
- Gas turbine control and protection system
- Steam turbine governor and auxiliary control
- Centrifugal compressor anti-surge control system
- Power plant turbomachinery DCS interface
- Offshore compressor package control system
Material Composition
- Main PCB: FR4 printed circuit board with conformal coating
- Signal processing: Precision A/D and D/A converter chips, instrumentation amplifiers
- Bus interface: High speed differential bus transceiver
- Backplane connector: Gold plated edge contact pins
- Front panel: Flame retardant polycarbonate plastic with LED indicators
- Terminal components: Tin-plated copper alloy screw terminals and surge protection devices
Structural Characteristics
- Rectangular plug-in rack card with front panel locking lever.
- Front panel LED indicators for power, run and fault status.
- Rear gold plated edge connector inserts into CCC rack backplane bus.
- Independent analog and digital circuit zones on PCB to reduce cross-talk.
- Internal galvanic isolation between field side and rack backplane.
- Passive convection cooling without fan.
Working Principle Field analog and discrete signals enter IOC-555-D card. A/D converter samples analog signals and digital input circuit reads contact status. The card transmits collected data to main turbomachinery controller via rack backplane bus. Main controller sends control command back to IOC-555-D. D/A converter and digital output drivers generate corresponding field output signals to actuate valves and solenoids. The onboard diagnostic circuit monitors signal quality and reports fault to main controller.
Installation Requirements
- Insert IOC-555-D card into designated slot of CCC turbomachinery control rack.
- Connect field instrument wiring to rack termination panel.
- Use shielded twisted pair cable for analog transducer wiring.
- Separate low level signal cables from high power cables.
- Complete protective earth connection for control rack.
- Configure channel type, range and alarm threshold in CCC configuration software.
- Simulate signal fault and trip interlock to test function after wiring completion.
Usage Notes
- Do not exceed rated voltage and signal range for I/O terminals.
- Keep cabinet dry and free of oil mist and conductive dust.
- Backup turbine control configuration before card replacement.
- Disconnect rack power before extracting or inserting card.
- Use anti-static wristband when handling spare card.
