Drives
PowerFlex® RS-485 HVAC Adapter
20-COMM-H
The 20-COMM-H RS-485 HVAC adapter provides an internal Modbus RTU, Johnson Controls Metasys N2, or Siemens Building Technologies P1 connection for PowerFlex 70, 700, 700S and 700H drives and other DPI-based host devices.
- Three protocols in one (RTU/N2/P1) selectable via rotary switch
- Network node address set via rotary switch or parameter
- P1 compliance tested
For a list of compatible products, refer to the Compatible Products Table.
| Compatible Products | |||||||
|---|---|---|---|---|---|---|---|
| Network Protocol | 70 (SC or EC) | 700 (SC) | 700 (VC) | 700H | 700S | 7000 | SMC Flex |
| Modbus RTU | X | X | X | X | X | X | X |
| Metasys N2 | X | X | X | X | |||
| P1 FLN | X | X | X | X | |||

