Solid State Latching Power Switch (SSLPS)

Invocon’s Solid State Latching Power Switch (SSLPS) provides switching control over an external DC power source with a single power input, four independently switched power outputs, and an UMBI/TM connector for Ground Support Equipment (GSE) on/off control, status monitoring, and flight telemetry. The SSLPS was designed to the RCC 319-19 standard and is well-suited for Flight Termination System battery power distribution applications where reliable latching action and post-latch power dropout survivability are required.

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Key Specifications

Specification
Value
Input Voltage
20 to 45 Vdc
Input Current (max)
10.4 A
Output Channels
4 switched outputs, up to 4.8 A each
Control Signal Voltage (Nominal)
28 Vdc
Latch State Change Threshold
>15 Vdc, >10 mA
Power Dropout Survivability (latched on)
Up to 50 ms
UMBI Status
10 kΩ inline current-limiting resistor; 2 kΩ for LED indicator
TM Status Output
0–5 Vdc scaled for power on/off state monitoring
Standard Compliance
RCC 319-19

Key Features

  • Four Independent Latching Outputs

    Each of the four outputs can be independently latched on or off, allowing selective power distribution to multiple FTS or avionics subsystem loads.

  • Nominal 28 Vdc Latching Control

    On and Off control signals each require >15 Vdc and >10 mA to change state. Once the control signal is removed, the switch remains latched in that state.

  • Power Dropout Survivability

    Once latched on, the SSLPS remains in the on state through input power dropouts of up to 50 ms, preventing inadvertent de-powering during transient events.

  • GSE UMBI Situational Awareness

    UMBI feedback includes a 10 kΩ current-limiting resistor for GSE voltage-divider monitoring and a 2 kΩ resistor for illuminating a panel-mount power indicator LED.

  • TM Status Output

    0–5 Vdc telemetry status output provides real-time on/off state data for inclusion in the vehicle PCM telemetry stream.

  • RCC 319-19 Compliant Design

    Designed to RCC 319-19 range safety standard for compatibility with FAA and DoD range FTS power distribution requirements.

Typical Applications

  • FTS Battery Power Distribution

    Distributes FTS battery power to multiple FTS ordnance loads or receivers with independent latch control per channel.

  • Pre-Launch GSE Power Monitoring

    Enables ground crew situational awareness of vehicle power state at the UMBI during launch preparations.

  • Telemetry Power State Monitoring

    Reports on/off switch state on vehicle PCM telemetry for range safety and mission assurance review.

Available Configurations

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