GE IS200SRTDH2A IS200SRTDH2ACB | RTD Terminal Board

Core Function and System Role

The GE IS200SRTDH2A terminates RTD sensors for Mark VI temperature monitoring. Specifically, this board connects to platinum resistance temperature detectors. Moreover, it provides excitation current and signal conditioning. The IS200SRTDH2ACB variant includes enhanced filtering for noisy industrial environments.

Technical Specifications Overview

This RTD terminal board features eight independent input channels. Each channel supports 3-wire and 4-wire RTD connections. Furthermore, the board provides 16-bit resolution for accurate temperature measurements.

Parameter	Specification
Part Number	IS200SRTDH2A / IS200SRTDH2ACB
Type	RTD Terminal Board / Temperature Input Module
Input Channels	8 Channels
RTD Type	Pt100, Pt500, Pt1000
Connection Type	3-Wire or 4-Wire
Temperature Range	-200°C to +850°C
Resolution	16 Bits (0.01°C Typical)
Accuracy	±0.2°C at 25°C
Excitation Current	0.5 mA per Channel
Lead Resistance	Up to 50 Ω per Lead
Common Mode Rejection	100 dB at 60 Hz
Power Supply	24 Vdc ±15%
Connector Types	2 x 50-pin D-sub, 2 x Terminal Blocks
Dimensions (W x H x D)	200 x 120 x 28 mm
Weight	0.68 kg
Onboard Energy Storage	6 x 100 µF, 35V Capacitors

Connector Layout and Component Count

The board uses two terminal blocks for RTD wiring connections. For instance, block TB1 handles channels 1 through 4. Meanwhile, block TB2 manages channels 5 through 8. Two 50-pin D-sub connectors route digitized temperatures to the controller. The IS200SRTDH2ACB adds six additional filter capacitors for noise reduction.

Energy Storage and Signal Integrity

This RTD terminal board includes local capacitance for stable excitation. Specifically, six 100 µF capacitors filter the 24 Vdc supply. Therefore, the board maintains accurate readings during power fluctuations. Additionally, onboard LED indicators show power and channel status. For example, a green LED confirms proper logic power. Red LEDs illuminate when any RTD experiences an open or short circuit.

Diagnostic Features and Fault Detection

The board continuously checks each channel for open or shorted RTD wires. Consequently, it detects sensor faults within 100 milliseconds. Moreover, the GE IS200SRTDH2A IS200SRTDH2ACB includes lead resistance compensation for 3-wire sensors. This feature eliminates errors from long cable runs. An onboard status register reports all channel health to the main controller.

Maintenance and Hot Replacement

You can replace this terminal board without powering down the turbine. Thus, mean time to repair remains under ten minutes. The board stores no calibration data locally. Therefore, you simply install the replacement and resume normal RTD monitoring.

Industrial Applications

This RTD terminal board works inside GE Mark VI control cabinets. For reliable GE temperature measurement, the IS200SRTDH2A and IS200SRTDH2ACB deliver exceptional performance. They provide accurate RTD interfacing for steam and gas turbine bearing and winding monitoring.