FALCON USER’S GUIDE 5.2.2 FALCON-TO-PAYLOAD COMMAND INTERFACE Separation device commands are used to initiate spacecraft separation from the second stage. Falcon launch vehicles can provide up to 36 separation device commands, typically implemented as up to 18 redundant commands. Up to 96 additional (48 redundant) commands can be accommodated as a nonstandard service; please contact SpaceX for details. Falcon vehicles are capable of detecting 6 separation events through breakwire pairs, and a separation indication signal for each will be included in launch vehicle telemetry. Additional breakwire sensing may be available, contact SpaceX for more information. SpaceX requires that at least one circuit on each spacecraft electrical connector be looped back on the spacecraft side for breakwire indication of spacecraft separation within launch vehicle telemetry. Customers may request that any number of circuits on the spacecraft electrical connectors be looped back on the launch vehicle side for breakwire indication of spacecraft separation within spacecraft telemetry. 5.2.3 TIMING SERVICES SpaceX can supply inter-range instrumentation group IRIG-B000 or IRIG-B120 time from its GPS clocks to customer EGSE at the payload processing facility and/or the launch pad. A launch countdown clock can also be supplied in the IRIG CS-5246 format. These timing services are provided as a standard service; other options are available as nonstandard services. INTERFACE COMPATIBILITY VERIFICATION REQUIREMENTS SpaceX requires that customers verify the compatibility of their systems with the Falcon mechanical and electrical interfaces before shipment to the launch site. As a standard service, SpaceX will support a payload adapter mechanical fit check, including electrical connector location compatibility, at a facility of the customer’s choosing. This interface compatibility verification does not include a shock test. Second-unit and later flights of similar systems may be subject to reduced pre-ship verification requirements. Nonstandard verification approaches can be developed on a mission- unique basis. © Space Exploration Technologies Corp. All rights reserved. 40