I/O modules

This printed circuit board provides turbine protection logic for GE Mark VIe control systems. It monitors critical parameters and initiates shutdowns during fault conditions. Therefore, it safeguards gas and steam turbines from catastrophic damage.

Physical and Protection Specifications

The GE IS200TPROH2C IS200TPROH2CBB measures 26.0 cm in length and 18.5 cm in width. Moreover, its board weight equals approximately 0.72 kg for rack mounting. A single 64-pin male connector links this board to the VME backplane. Additionally, the board integrates multiple protection functions and trip logic.

Turbine Protection and Trip Logic Features

The GE IS200TPROH2C IS200TPROH2CBB executes programmable protection logic for turbines. Specifically, it monitors overspeed, overtemperature, overpressure, and vibration inputs. In addition, the module combines multiple inputs using AND, OR, or voting logic. Moreover, the response time of under 15 milliseconds ensures rapid turbine shutdown. Furthermore, a hardware watchdog timer activates trip relays if the processor fails. Consequently, this board provides fail-safe turbine protection for Mark VIe systems.

Analog and Digital Input Monitoring

This protection board accepts 16 analog signals and 16 digital inputs from field sensors. For instance, analog inputs monitor thermocouples, RTDs, and pressure transducers. In addition, digital inputs accept 24 VDC signals from limit switches and pressure switches. Moreover, the FPGA processes all inputs simultaneously for fast trip decisions. Furthermore, input isolation protects the backplane from field wiring faults. Thus, the GE IS200TPROH2C IS200TPROH2CBB provides comprehensive turbine protection monitoring.

Trip Relays and Fail-Safe Operation

Eight Form C trip relays provide redundant shutdown outputs for safety circuits. Specifically, the relays de-energize to trip, providing fail-safe operation. In addition, each relay contacts rated at 5 amps can directly shut down fuel valves. Moreover, the module includes separate relay drivers with individual status monitoring. Furthermore, the software configures trip relay mapping based on protection functions. Therefore, this board ensures reliable turbine shutdown during any fault condition.

Energy Storage and Configuration Retention

This protection board stores energy using seven onboard capacitors for power filtering. Specifically, four electrolytic capacitors smooth the 5 VDC supply for stable processor operation. In addition, three tantalum capacitors provide high-frequency noise suppression for logic circuits. Moreover, a lithium battery retains configuration parameters and trip history. Furthermore, a real-time clock timestamps all protection events for diagnostics. Thus, the GE IS200TPROH2C IS200TPROH2CBB preserves trip settings for up to five years without external power.

Installation and Diagnostic Indicators

Twenty-seven LED indicators provide operational status at a glance on this board. First, a green Power LED lights when the backplane supply voltages are present. Second, a green Run LED flashes during normal protection logic execution. Third, 16 green Input Status LEDs illuminate when each digital input receives an active signal. Fourth, eight yellow Trip Active LEDs light when each trip relay is energized (normal state). Finally, a red Fault LED indicates hardware errors, watchdog timeouts, or configuration faults. Additionally, the board features six mounting holes for secure rack attachment. Thus, you can monitor turbine protection status instantly without external test equipment.

Details