Solvline USB Multiport - Manual (Page 32)

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Hardware Multi 4/8 V1.5 & 1.6
- Portx RT: RS422, RS485 Terminal Resistor
 Multi-4/USB Combo V1.5, V1.6
 Multi-8/USB Combo V1.5, V1.6
 422: RS422 Terminal Resistor
 485: RS485 Terminal Resistor
 NONE: No Terminal Resistor
- External Voltage Supply
- In Multi-4/8 USB Combo model, +5V is always supplied through the 9th pin of DB9 connector.
Users can connect 9th pin to the device if they are to supply +5V to the device.