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Solid State Event Initiator (SSI)

Invocon’s Remote Power Control (RPC) Remote Ground Support Equipment (RGSE) provides for power control and monitoring for Avionics or Flight Termination System (FTS) payloads. This includes system monitoring, power switching (e.g., internal/external, on/off), and battery maintenance as well as RS422 communications all through the vehicle’s UMBI(s). The rack is controlled remotely via direct Ethernet connection or through a fiber optic converter for extended range.

Key Specifications

Specification
Value
Output Channels
4 fully redundant or 8 non-redundant programmable channels
Timing Resolution
1 millisecond per channel
Power Options
24 to 36 VDC vehicle power; single or redundant smart rechargeable batteries; single or redundant smart primary batteries
Dimensions
6.25" x 6.25" x 1.78"
Weight
3.5 lbs
Volume Reduction vs. CDI
77%
Mass Reduction vs. CDI
75%
Optical Isolation
Between fire paths and control electronics

Key Features

  • Fully Redundant Output Channels

    Supports four fully redundant (or eight non-redundant) output channels with optical isolation between fire paths and control electronics.

  • Squib Sense™ Fire Path Analysis

    Invocon’s proprietary Squib Sense™ capability continuously analyzes each fire path for readiness — whether the vehicle is armed or safe — providing pre-fire verification without initiating the circuit.

  • Programmable Timing and Pressure Arming

    Each channel supports independently programmable firing sequences, pressure-based arming windows, and logic-controlled start windows with automated rejection of illegal program inputs.

  • Multiple Sequence Start Modes

    Firing sequences can be initiated by lanyard pull, an alternate trigger input, or a serial (RS-422) command, providing flexibility for different launch architectures.

  • Compact 77% Volume Reduction

    Replaces the legacy CDI with a 77% smaller volume and 75% lighter package, freeing payload mass and volume for other avionics.

  • Flexible Power Architecture

    Accepts vehicle power (24–36 VDC) or single/redundant smart rechargeable or primary batteries.

Typical Applications

  • Stage Separation and Payload Deployment

    Fires pyrotechnic bolts or separation nuts on a programmable timeline with 1 ms resolution.

  • Engine Ignition

    Commands solid motor or liquid engine igniters with configurable timing relative to launch sequence triggers.

  • FTS Ordnance Activation

    Activates flight termination ordnance on receipt of TERMINATE command with full redundancy.

  • Pre-Launch Fire Path Verification

    Uses Squib Sense™ to verify all squib circuits are intact and ready before arming, reducing range abort risk.

Available Configurations

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Invocon’s engineering team partners with prime contractors, government agencies, and commercial space companies on custom flight hardware, instrumentation, and mission support. Most engagements begin with a 30-minute scoping call.

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