Boolean Engineering Pty. Ltd.

Audiophile and Home Theatre Electronics Technology Design

 

EASYcomms EC-3
Serial Control of Relay via RS232, USB or RS485



 

WHAT IS THE EASYcomms EC-3

 

The EASYcomms EC-3 is a normally open solid state relay that is user controlled via any of the industry standard communications protocols, either RS232, RS485 or USB.

Each unit is address selectable and has various operating modes for maximum user flexibility via a simple 10 character ASCII command set.

User commands are sent as a 10 character ASCII packet and all ten characters are required to generate a valid message in the form:                      < addrhi addrlo , cmnd , timhi timmi timlo >

These commands allow user control of the relay in Instant mode or Timed Delay On/Off or Timed Duration operation.



APPLICATION NOTES
AN57 - EASYcomms: Standard Operation Mode


WHERE IS THE EASYcomms USED


Control systems for Audio Visual, Lighting, Security, and Process, Industrial and Automation controllers all benefit from the flexible, remote switching provided by the EASYcomms

System control software can now communicate with the on board solid state relay to provide added control and reporting options beyond basic relay capability.

HOW IS THE EASYcomms USED

1/ Connect the desired communications line from RS232,USB or RS485
2/ Configure the 2 protocol selection switches (See AN57 above).
3/ Select device by links A0 to A5 for a range of 00 to 3F (00 is global).
4/ Connect a 12 VDC 500 ma regulated supply, centre positive, 2.1 mm plug.
5/ Set serial data protocol to 9600 baud,8 data bits, no parity and 1 stop bit.
6/ Send commands a 10 character ASCII packet (See AN57 above).
7/ Optionally receive echo back reports of command actions.


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