quick jobs h bridge circuit to drive

Posted on Feb 6, 2014

8 solid-state-relay (SSR) and ADAM-4068 (Serial-I/O device) and ask me to wire a circuit to control a motor for his robot. ADAM-6048 is a handy device that let you control digital input and output via RS-485, serial communication given a protocol in its manual. Output of ADAM is rated at 0. 5 ampere so I use it to control the SSR which can operate up to 40 ampere each.

quick jobs h bridge circuit to drive
Click here to download the full size of the above Circuit.

When output set to "high", current will able to flow from COM to NO. Best to imagine it as a simple switch, when push both pin will connect and let a current flowing. Then pin 1 and pin 2 of SSR will connect and let a (high) current passthrough the motor. Unlike normal relay, SSR let current pass in only one direction, from pin 2 to pin 1 and from pin 4 to pin 3 as I indicate + and - sign in above diagram. I blown 2 SSR because of this ignorance!

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