Specifications

Hardware Reference
110124-30002, preliminary
13
VGA Option
The following table describes the additional connectors on the rear panel of a system that
includes the VGA options board.
Connector
Enclosure Connector
Description
Microphone RCA jack Mono microphone input
Line In RCA jack Stereo line in
Line out RCA jack Stereo line out
Video DE-15 socket VGA video output
Connectors
The following tables describe connectors that do not follow an industry-standard pinout.
Power Input
Connector: 2-pin header, 3.5 mm, Phoenix Contact 1937318
Mating connector: 2-pin plug, Phoenix Contact 1847055
The Helios platform accepts input power from a regulated external supply. For details
about input power options, see Power Supply, page 19.
Pin Name Type Description
1 GND P ground
2 VIN PI 12 V (nominal) power input
Serial Port
Connector: DB9 plug
Mating connector: DB9 socket
By default the Helios platform provides an EIA-232 serial port. As a software-controlled
option, this port can be configured for EIA-485 operation.
Pin
EIA-232 (default) EIA-485
Name Type Description Name Type Description
1 DCD I Data Carrier Detect RX+ I Receive Data +
2 RXD I Receive Data RX- I Receive Data -
3 TXD O Transmit Data TX- O Transmit Data -
4 nc TX+ O Transmit Data +
5 GND P ground GND P ground
6 nc nc
7 RTS O Request To Send nc
8 CTS I Clear To Send nc
9 nc nc