Bus Switches are devices that enable system architecture to be reconfigured. This reconfiguration is mostly accomplished in the test environment and includes but is not limited to simulation of missile firing and switching in or out a new section of bus interface.

Excalibur Systems is the only manufacturer of devices (ESI-R24/27/28) that contain their own TTL driver circuitry that allows them to be directly driven from a computer.

ESI-R10
ON / OFF Switches - 28V
ESI-R11
ON / OFF Switches - 5V
ESI-R12
ON / OFF Switches - 5V, Internal TTL Driver
ESI-R20
DPDT Switches - 28V
ESI-R21
DPDT Switches - 5V
ESI-R22
DPDT Switches - 5V, Internal TTL Driver
ESI-R24
DPDT Switches 5V - Internally Terminated
ESI-R27
DPDT Switches 28V - Internally Terminated
ESI-R28
DPDT Switches 5V - Internally Terminated, Internal TTL Driver
ESI-2310R27
Two Stub Internally Terminated Bus Coupler that can be Switched out of the Circuit to Accommodate Testing.
ESI-3310R27
Three Stub Internally Terminated Bus Coupler that can be Switched out of the Circuit to Accommodate Testing.