The GE IS200SCLTH1A IS200SCLTH1AAB core analog terminal board connects field sensors to Mark VI control systems. This board conditions and filters analog signals from critical turbine measurements. You will find this terminal board in Speedtronic Mark VI control cabinets. Its high-density design packs sixteen analog inputs into a single slot.
Analog Input Architecture
This core analog board provides sixteen differential analog input channels. Consequently, it rejects common-mode noise from long field wiring. The GE IS200SCLTH1A IS200SCLTH1AAB accepts both voltage and current input signals. Moreover, a 16-bit ADC delivers high measurement resolution. You can configure each channel independently via software.
Technical Specifications
| Parameter | Value |
|---|---|
| Input Channels | 16, differential, 16-bit resolution |
| Input Ranges | 0-10V, ±10V, 0-20mA, 4-20mA (selectable) |
| Accuracy | ±0.05% of full scale |
| Input Impedance | 1 MΩ (voltage mode), 250 Ω (current mode) |
| Sampling Rate | 100 Hz per channel |
| Common Mode Rejection | 100 dB minimum at 60 Hz |
| Dimensions | 260mm x 180mm x 30mm |
| Weight | 0.68 kg (1.50 lbs) |
| PCB Layers | 6 |
| Onboard Components | 1 ADC, 16 op-amps, 16 filters, 1 precision reference |
| Connector Count | 3 (field input, backplane, calibration) |
| Status Indicators | 1 LED (power good) |
| Energy Storage | 1000 µF (analog supply filtering) |
| Isolation Voltage | 1500V (field to logic) |
| Offset Drift | ±1 µV/°C maximum |
| Gain Drift | ±5 ppm/°C |
| Operating Temperature | 0°C to +50°C |
| Storage Temperature | -20°C to +70°C |
Signal Conditioning and Filtering
The unit includes programmable low-pass filters on each input channel. Therefore, it rejects high-frequency noise from industrial environments. This board replaces the IS200SCLTH1AAB version without any calibration changes. Simply remove the old board and install this one. GE designed this terminal board for single-slot installation. Hence, it fits directly into existing Mark VI rack positions.
Six PCB layers separate analog and digital signal paths effectively. Three connectors handle all field, backplane, and calibration signals. The GE IS200SCLTH1A IS200SCLTH1AAB includes a precision voltage reference for self-calibration. Accordingly, it maintains accuracy over temperature and time. This feature proves essential for turbine speed and position measurements.
Calibration and Installation Guide
You must perform an auto-calibration routine after installing this board. The onboard reference provides 2.5V and 5V for gain verification. The GE IS200SCLTH1A IS200SCLTH1AAB stores calibration constants in non-volatile memory. Consequently, it retains settings even after power loss. A single green LED indicates that the board has power.
Always use shielded twisted-pair cable for analog input wiring. Connect the shield only at the board end for best noise rejection. The GE IS200SCLTH1A IS200SCLTH1AAB works with thermocouples, RTDs, and pressure transmitters. Proper grounding of analog commons prevents ground loop errors. This board operates reliably in non-condensing environments only.
Details
| Weight | 0.1 kg |
|---|---|
| Dimensions | 25 × 108 × 127 mm |
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