Helios Series System

• Maximum Inputs & Outputs: ≤1500 points per system
• Scanning Speed:
  * Up to 16 channels  per second with 1 A/D option
  * Up to 30 channels per  second with 2 A/D options
• Interface:
  * RS-232C or RS-422
  * Baud rate: 110,300,600,1200,2400,4800,9600,19200
  * Multi-Drop Capability via RS-422 - up to 10 Helios Mainframes

2289A Helios Mainframe

• I/O Capacity: six slots for input and output options.  One of the six slots must contain an A-to D converter option when one or more analog input options are used

2281A Extender Chassis

• Capacity: same plug-in options as 2289A

Options

• High Performance A/D Converter Option (-161): one per 2289A required for any analog measurement inputs
• Ranges: ±64 mV, ±512 mV, ±8V, and ±64V dc
• Input Options

  For These Inputs	Use Connector Option	With Scanner Option	Maximum Inputs Per Scanner
  Thermocouples	-175	-162	20
  DC Voltage	-176 or 175	-162	20

• Other 2280 Series Options available upon request
  * ACV/DCV Input Connector
  * RTD/ohms Scanner/Excitation
  * RTD/ohms/Strain Scanner/Excitation
  * Counter/Totalizer
  * Digital Status Input/Output