Contact Us

Solid State Event Initiator (SSI)

Invocon’s Solid State Initiator (SSI) provides highly reliable and safe initiation capabilities for energetic devices (squibs), serving as a solid-state replacement for Invocon’s legacy Capacitive Discharge Initiator (CDI). The SSI replaces the CDI’s mechanical devices with solid-state electronics while maintaining the same levels of fail-safe protection required by rockets and spacecraft for engine activation and pyrotechnic functions. Event initiation is controlled through a combination of programmable timing, external commands, and pressure, with automated error checking and Invocon’s Squib Sense™ fire path analysis.

Download DatasheetContact an Engineer

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

[ Product Portflio ]

Related Products

[ Start a Conversation ]

Bring Us Your Hardest Problem

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.

Get StartedView Products
Direct

 Info_request@invocon.com · (281) 292-9903 · Conroe, Texas