GE Mark VIe IS230SNCIH6A 6-Channel Input 6-Relay Module

Product Description

The IS230SNCIH6A is a specialized Simplex Discrete Contact Input Module engineered for the GE Mark VIe and Mark VIeS Speedtronic control platforms. This module serves as a critical interface for collecting and conditioning discrete signals—such as limit switch positions, relay auxiliary contacts, and protective interlocks—from turbine generator auxiliary systems. By providing 1 ms Sequence of Events (SOE) resolution, the IS230SNCIH6A ensures high-precision fault analysis and synchronized logic execution within the turbine control network.

Designed for high-reliability industrial automation, the IS230SNCIH6A features robust optical isolation for its 6 discrete input channels, protecting the master controller from field-side electrical surges and noise. Additionally, the board integrates 6 Form-C relay outputs, enabling it to act as both a monitoring and a command execution node for auxiliary protection logic. Its compact DIN-rail mounting and dual communication interface (IONet and RS-485) make it an essential component for distributed control architectures where space and redundancy are paramount.

Technical Specifications

• Model Designation: IS230SNCIH6A

• Control System Series: GE Mark VIe / Mark VIeS

• Input Channels: 6 Isolated Discrete Contact Inputs

• Output Channels: 6 Form-C Relay Outputs

• SOE Resolution: 1 ms (millisecond) event capture for precise diagnostics

• Input Isolation: 125 VDC nominal (Supports industrial dry contact excitation)

• Signal Filtering: Integrated 4 ms hardware filtering to suppress contact bounce

• Communication Ports: Dual-interface (Fiber-optic IONet and RS-485 Serial)

• Mounting Style: Standard 35mm DIN-rail mount

• Operating Temperature: -40 °C to +70 °C (-40 °F to 158 °F)

• Storage Temperature: -40 °C to +85 °C

• Dimensions: 100 mm x 75 mm x 40 mm (PCB-level footprint)

• Weight: 0.25 kg (Net) / 0.4 kg (Packaged)

• EMC Compliance: IEC 61326-1 for heavy industrial environments

Application & System Strategy

The IS230SNCIH6A is primarily deployed in gas and steam turbine control cabinets where high-speed discrete feedback is required for safety interlocks. Its "Simplex" designation makes it ideal for non-critical monitoring or for use in distributed I/O racks where cost-efficiency is balanced with industrial-grade reliability. By offloading the SOE recording to the module level, it reduces the processing load on the main UCCx controller cards while providing millisecond-accurate timestamps for every contact state change.

Frequently Asked Questions

What is the difference between the IS230SNCIH6A and the STCI series?

The IS230SNCIH6A is a specific variant within the Mark VIe ecosystem optimized for simplex I/O pack interfacing. While functionally similar to the STCI in signal conditioning, the SNCI variant is tailored for specific sub-rack configurations and communication baud rates common in newer Mark VIeS safety platforms.

Does this module require external excitation for the contacts?

Yes, while the IS230SNCIH6A provides the isolation and filtering, the dry contacts in the field typically require a 24 VDC or 125 VDC excitation source, which is routed through the module to detect the circuit state.