GE IS200STCIH4A DIN RAIL CONTACT I/P

Part Number IS200STCIH4A Manufacturer General Electric Country of Manufacture

As Per GE Manufacturing Policy Series Mark VI/VIe Function Module Availability

IS200STCIH4A is a DIN Rail Contact Input Card manufactured by General Electric as part

of Mark VI Series used in gas turbine control systems.

It was conceived as a tiny board with fifty-one screw connectors and a terminal board running along one long side.

E1 and E2 are the labels on the terminal ring on either side of the terminal board.

A single 37-pin (female) D-type connector and a single three-position female plug are situated

opposite the terminal strip on the board. On the short edges of the board,

there are two round apertures cut into the board, one opposite the other.

Over 80 resistors, capacitors, diodes, and a single integrated circuit are scattered across the board.

INTEGRATION WITH THE CONTROLLERThe controller receives the digital temperature values from the VCMI board, allowing it to monitor and control temperature-dependent processes within the industrial system. This seamless integration ensures accurate temperature measurement and control, contributing to the overall efficiency and reliability of the system. EXCITATION CURRENT The board supplies a 10 mA DC multiplexed excitation current to each RTD through the terminal board. This excitation current is not continuous but is provided intermittently to energize the RTDs for temperature measurement. 

SIGNAL PROCESSINGThe resulting signal from each RTD returns to the VRTD board for further processing. It utilizes a Voltage Controlled Oscillator (VCO) type Analog-to-Digital (A/D) converter. This converter employs voltage-to-frequency converters and sampling counters to convert the analog signals from the RTDs into digital values. SCANNING FREQUENCY The converter samples each signal and the excitation current four times per second in normal mode scanning. In fast mode scanning, the sampling frequency is increased to 25 times per second. The sampling interval is adjusted based on the power system frequency to ensure accurate temperature measurements. TEL:+8618144100983

LINEARIZATION AND RTD TYPESSoftware implemented in the digital signal processor performs linearization of the RTD signals. This allows for the accurate conversion of temperature values, with support for 15 different RTD types. FAULT DETECTION AND CHANNEL MANAGEMENT The board detects open and short circuits in the RTD inputs by monitoring for out-of-range values. If an RTD is determined to be outside the hardware limits, it is automatically removed from the scanned inputs to prevent adverse effects on other channels. Repaired channels are reinstated automatically after 20 seconds or can be manually reinstated by the user.