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Ewon Netbiter I/O Extender 4RO (4 x relay output), RS-485 Modbus-RTU
https://mig-ee18-1.odoo.branom-us-w-1.hibou.me/shop/iox-4ro-ewon-netbiter-i-o-extender-4ro-4-x-relay-output-rs-485-modbus-rtu-550266
https://mig-ee18-1.odoo.branom-us-w-1.hibou.me/web/image/product.template/550266/image_1920?unique=dd7bded
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