Hi5a controllermaintenanceHi5a-S/P/C/T/J Controller Maintenance Manual5. Controller Options5.11. Fieldbus communication board (BD525)5.11.2. Connector & I/O deviceOn this page5.11.2. Connector & I/O device5.11.2. Connector & I/O device 5.11.2.1. Ethernet connector5.11.2.2. Optional module connector5.11.2.3. In/output device