How do I interface a positioning sensor with SSI interface with an OMRON safety PLC with only RS485 interface? I understand both are serial, but would I loose resolution if I interface it?
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Digital is digital. – Ignacio Vazquez-Abrams Sep 18 '15 at 01:03
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Is your RS485 4-wire or 2 wire??? – Kvegaoro Sep 18 '15 at 15:34
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Which Omron PLC is it? – Ben Miller - Remember Monica Sep 18 '15 at 20:30
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SSI is point to point serial communication method usually used to send information from an encoded sensor to a micocontroller or PLC. RS485 is a point to multi-point communication method that has a entirely different protocol, used to link microcontollers or or PLC's into a network. To convert from one to to another, you would need to design a small circuit with a MCU that had a SSI transceiver and a RS485 Transceiver (either 2 wire or 4 wire), and write code that translated the two protocols.
HOWEVER, they do sell exactly such a device; here is one already made from HMK: http://www.hmkdirect.com/shop/IV251/
David Drysdale
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