DATA ACQUISITION SYSTEMS   

     SIGMA DATA ACQUISITION SYSTEM
                                             

	Portable rugged data acquisition modules   Plug in or screw terminal sensor inputs   Fast set-up in portable applications   Modules support a wide range of sensors   USB connection to PC   Industry standard RS485/RS232 communications   IP55 rated with -20ºC to +70ºC operating temperatures
	The Sigma remote data acquisition system features small, portable remote measurement units which can be distributed over a wide area and connected via an RS485 high speed network - reducing the cost of transducer cabling at the same time as ensuring the integrity of the measured results. The system consist of a number of different modules suitable for a range of standard input sensors and a computer interface-network power supply unit. Up to 99 Sigma units can be connected to a single RS485 network over a combined length of 1Km. The hub of the system is the 381 interface, which converts the RS485 into either a RS232 (381A) or a USB (381U) signal for connection to a PC. The 381 interface also provides DC power for all the Sigma modules on the network. Only the 312a unit requires local power to supply programmable transmitters. Modules are networked over two-pair cable and the network connections are made using plugs and sockets for ease of installation. Each module has a connection for a local display to assist in the set up process. The communications protocol ensures that all channels on the network will be returned to the PC every second. The data is of the highest integrity as it is digitised at source with full series mode noise rejection.
	SIGMA MODULE SELECTION TABLE