GE IS230TNRLH1B
I. Overview
The IS230TNRLH1B is a relay output-type DIN rail module designed for industrial automation and process safety. As part of GE’s distributed turbine control system, it is used to control various industrial equipment and process elements. This module supports multiple voltage levels and features high reliability and safety, making it suitable for critical industries such as oil, natural gas, petrochemicals, and power generation.
II. Specifications
- Model: IS230TNRLH1B
- Manufacturer: General Electric (GE)
- Product Type: Relay output-type DIN rail module
- Series: Mark VIe
- Function: Digital output module
- Number of Outputs: 16 digital relay outputs
- Output Type: Digital relay output
- Output Ratings: 24V DC, 120V AC, 240V AC (depending on configuration)
- Isolation Method: Optically isolated outputs
- Certification Standards: Compliant with IEC 61508 SIL 2 and SIL 3 standards
- Operating Temperature Range: -40°C to +70°C
- Communication Interface: Tricon Communication Module (TCM)
- Dimensions: 17.8 cm width × 33.02 cm height
- Country of Manufacture: United States (USA)

III. Product Features
- High Reliability and Safety: The IS230TNRLH1B module complies with IEC 61508 SIL 2 and SIL 3 standards, providing high-level safety performance in harsh industrial environments.
- Multi-Voltage Support: It supports multiple output voltages, including 24V DC, 120V AC, and 240V AC, adapting to diverse industrial applications.
- Optically Isolated Outputs: Optical isolation technology ensures electrical isolation between control circuits and power circuits, protecting sensitive equipment from voltage spikes or electrical faults.
- Compact Design: The module uses DIN rail mounting, saving space and facilitating integration into complex industrial control systems.
- Durability: Designed to resist vibration, shock, and operate over a wide temperature range, suitable for various industrial environments.
- Compatibility: Supports communication with the Tricon Communication Module (TCM), ensuring compatibility with other systems and stable data transmission.
IV. Structure and Composition
The IS230TNRLH1B module includes several key components:
- Seven built-in fuses: For overcurrent protection.
- Four transformers: For voltage conversion.
- Six terminal blocks: For connecting external devices.
- Over 25 test points: For debugging and maintenance.
- Multiple jumper switches: For configuring module parameters.
- Coil inductors, resistors, relays, diodes, capacitors, and integrated circuits: Core electronic components responsible for signal processing and control.
- Over 100 voltage regulators: Distributed along the three edges of the circuit board to stabilize voltage output.
- Various connectors: Including six terminal blocks and over 45 plugs or connectors, such as conductive connectors, vertical pin connectors (male), and female connectors.

V. Application Fields
The IS230TNRLH1B module is widely used in the following fields:
- Industrial automation: Controlling various industrial equipment and processes, such as motors, valves, and sensors.
- Process safety: Controlling various process elements in safety-critical environments within industries like oil, natural gas, petrochemicals, and power.
- Power systems: Applications in power transmission and distribution, power quality, and power generation.
- Gas turbine control: As part of GE’s distributed turbine control system, controlling the operation of gas turbines.
- Safety Instrumented Systems (SIS): Controlling safety-critical processes in industrial applications requiring high reliability and safety.
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