Product Description
High-Integrity Discrete Signal Processing
The IS230SNCIH2A (SNCI) functions as a critical interface within the GE Mark VIe distributed control system (DCS). It specifically handles discrete inputs from field devices such as limit switches, relay contacts, and pushbuttons. This module utilizes a Simplex redundancy style, meaning it operates as a single I/O pack that communicates directly with the controller via the internal IONet. The design emphasizes deterministic timing, ensuring that state changes in field equipment are captured and reported within the specific control cycle requirements of steam and gas turbines.
Unlike multi-purpose I/O modules, the IS230SNCIH2A is optimized for high-density discrete monitoring. It converts raw 24 V DC signals into digital data packets that the Mark VIe controller processes for logic execution. The module hardware includes advanced filtering to eliminate contact bounce and electromagnetic interference, providing a clean signal for critical control loops.
Technical Specifications
The following table summarizes the core technical parameters for the IS230SNCIH2A discrete input module.
| Parameter | Specification |
| Manufacturer | General Electric (GE) |
| Model Number | IS230SNCIH2A |
| Series | Mark VIe / Mark VIeS |
| Functional Abbreviation | SNCI |
| Input Type | Discrete Input (Contact Input) |
| Nominal Voltage | 24 V DC (Supports up to 28 V DC backplane) |
| Redundancy Style | Simplex (Single I/O Pack) |
| Mounting Configuration | DIN-rail or Rack-mounted Terminal Board |
| Communication | Proprietary GE IONet (Ethernet-based) |
| Diagnostics | Onboard self-test, voltage monitoring, and link status |
| Operating Temperature | 0 °C to +60 °C |
| Physical Dimensions | 260 mm x 180 mm x 60 mm |
| Weight | 0.5 kg |
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