GE IS20OSNRLH2A（IS230SNRLH2A) Discrete Output Relay Module

The GE IS230SNRLH2A, also cataloged as the IS200TRLYH2A Discrete Output Relay Module, operates as a dedicated hardware component for contact switching and field device actuation within Mark VIe and Mark VIeS turbine control systems. This DIN-rail mounted assembly serves as a direct physical and electrical execution interface, deploying 12 Form-C mechanical relays to switch heavy field-side elements including solenoids, external alarms, and drive contactors.

Suffix Breakdown & Model Matrix

• IS230SNRLH2A (Full Module Assembly): Identifies the complete physical device configuration enclosed in its industrial protective housing carrier. This model integrates the underlying circuit tracks with an active processor pack and Euro-style box terminal strips configured for simplex topology networks.
• IS200TRLYH2A / IS20OSNRLH2A (Base Terminal Board): Designates the internal base printed circuit board assembly (PCBA) element. It houses the primary 12 Form-C changeover relays, structural surface-mount components, conformal insulation layer, and the D-shell female connector ports.

Hardware Specifications

Industrial Control and Drive Dynamics

• Backplane Bus Communication Velocity and Processing Matrix: The module routes serialized logic commands from the host controller directly across the female D-shell network plug into internal driver registers. This discrete architecture maintains steady signal translation metrics, triggering relay coils without inducing process latencies or software-based scan lags.
• I/O Density Scaling and Continuous Load Handling: The hardware consolidates 12 independent Form-C output channels onto a single 15.9 cm x 17.8 cm footprint. The surface-mount trace configurations are sized to support concurrent load matrices—such as 24 VDC lines pulling a full 5 A—while minimizing localized thermal buildup under extended continuous duties.

Frequently Asked Questions

Q: Can this simplex relay module be wired to support a Triple Modular Redundant (TMR) voting structure?

A: No. The internal electrical copper pathways, trace distribution, and signal paths of the IS230SNRLH2A are explicitly engineered to run in simplex mode only. It lacks the redundant terminal headers and shared trace splits needed to distribute coil loads across three independent processing channels.

Q: How does the choice of external operating voltage affect the continuous contact current thresholds?

A: The contact ratings are bounded by the inductive arcing profiles of the chosen voltage. The mechanical contacts safely commute up to 5 A under a low-voltage 24 VDC threshold, but the current limit scales down sharply to 1.2 A at 48 VDC, and drops to a maximum of 0.6 A when handling heavy 125 VDC station battery lines.

Field Installation Guidelines

• Chassis Layout Alignment, Clearance Constraints, and Mechanical Seating: Snap the module carrier base firmly onto a grounded, standard industrial DIN rail within the enclosure. Maintain a minimum 50 mm convective cooling gap around the perimeter housing vents to facilitate continuous thermal dissipation and allow unhindered access to the Euro-style terminal screws.
• Conductor Separation, Wireway Constraints, and Shield Grounding: Route all inductive relay load cables inside panel channels that are physically separated from high-speed Ethernet cables or sensitive low-voltage analog instrumentation lines. Connect all external signal wire shields to a separate panel bracket to prevent field-side inductive cross-talk fields from penetrating the surface-mount logic layers.