SmarTek Systems SAS-1 Specifications and Service Information - Manual (Page 3)

SmarTek Systems (www.smarteksys.com) 3
Specifications
Number of Lanes and Message Formats
The SAS-1 can monitor 5 lanes and provides for several different interfaces depending on the
communication link and the cabinet controller interface desired. The standard SAS-1 output
message provides per lane traffic flow measurements of vehicle volume, lane occupancy, and
average speed for a selectable update period (1 to 220 seconds). A bit serial vehicle presence
relay message or opto-isolated dry contact vehicle presence relay signals (using the SAS Relay
Interface) can be provided.
Measurement Archiving
Up to 60 days depending on size of installed Flash Memory (1, 2, or 4 Mbits).
Signal Interfaces
1) RS-422 (Standard) ............. Hard Wired Home Run (up to 2000 feet)
2) RS-232 (Optional) .............. Hard Wired Home Run (up to 100 feet)
3) Wireless (Optional) ............ Wireless Link (2.4 GHz Spread Spectrum)
Power
1) Supply Voltage at the Sensor ....... 8 to 24 VDC
2) Required Power ......................….. Less than 2 Watts
Physical
1) Dimensions ....................12 in long x 8 in wide x 3.5 in deep
2) Weight (with Bracket) ..Less than 7 lb.
3) Material/Finish .............Aluminum/Enamel/Stainless Steel Fasteners
4) Mounting Bracket .........2 inch Diameter Aluminum Tube/Stainless Steel Bands
5) Operating Temp....….....-20 Deg C to 75 Deg C
6) Humidity........................5% to 100%
7) Shock..............................NEMA TS2-2.1.10
8)Vibration.........................NEMA TS2-2.1.9
Installation
Mount on roadside structure for coarse mechanical positioning so that the sensor face is pointing
toward the center of the lanes to be monitored. After the SAS-1 is mechanically oriented and
locked down, the position and size of each detection zone (up to 5) are electronically set using
the SAS Monitor and Setup program. All SAS-1 setup parameters are stored in non-volatile
memory.
1) Height Above Pavement .................................… 25 to 35 feet
2) Horizontal Distance to First Detection Zone .…. 5 to 30 feet
3) Coarse SAS-1 Orientation ..............................…..Mechanical
4) Precise Detection Zone Position and Size ...….….Electronic