Specifications

Helios Platform Hardware Reference Manual
110124-30002, preliminary
14
Boot Mode Switch
The Helios platform includes a momentary push-button switch accessible through a small
hole on the rear panel near the GPS connector. This switch generates an interrupt to the
processor and is software-definable.
USB Bay
The following diagram illustrates the location of connectors inside the USB Bay.
The three USB 2.0 host ports located in the USB Bay permit use of wireless USB devices
inside the enclosure. These ports use USB sockets with locking latches preventing
accidental disconnects or lost connections due to vibration. Each USB port includes a
corresponding connection for an external antenna. The type of connection is dependent
on the USB device used.
Some USB devices will not fit in the USB Bay or require cabling external to the
enclosure. For these types of devices, cables for the USB interface can plug into the
locking sockets in the USB Bay and then pass through the larger external cooling vents in
the bottom of the USB Bay cover. A CAN interface is one example of such a device. For
additional information about the enclosure, see Enclosure, page 16.
Warning: Do not forcibly pull on the USB device to disconnect. Raise the
latch on the socket to remove the device.
USB Sockets with
Locking Latches
Antenna
Connections