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Digital Outputs: 4
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The SOM1 Serial Output Module is designed to be used with PCs and compatibles. Each module has 4 independent single pole changeover relays which can be independently addressed from the PC. The standard RS232 serial output is converted to RS485 by the first module and this is used to drive subsequent modules. Each module may be allocated one of 256 addresses, thus allowing for control of 1024 relays. Addresses are selected using an 8 way DIL switch and more than one module can have the same address. This will allow several relays to be controlled simultaneously.
Modules can be physically placed in positions remote from the PC. The link from the PC Serial Port to the first module is restricted to approximately 50 metres. After that modules can be located as much as 200 metres apart. Connection between the PC and the first module would normally use a standard null terminated modem lead connected to the 9 pin 'D' connector. From the first module to subsequent units twin screened cable is recommended with connections to the screw terminal block provided. Inter-module wiring may be either parallel or serial with 'T' junctions as required. Cable impedence matching may be selected by on board links.
The SOM1 is supported by FREE windows based software. To control the module there is no need to write any code.
This program has been written using ProfiLab - a low cost graphical programming package designed for data acquisition and control applications. No programing experience is needed, programs are written by connecting function blocks together with wires. Professional user panels can be designed with custom controls, and the whole program can be compiled into a stand-alone executable file, with no run-time penalties.
User Manual >>
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