How many devices can be daisy chained off of the PNIM RS-485 ports?
Product Line
PNIM
Environment
RS-485
Resolution
The maximum number of devices that can be daisy chained out of the PowerLogic Network Interface Module (PNIM) RS-485 port are 32, without using repeaters. The maximum length of the daisy chain is dependent on the baud rate of the devices. See table below.
Typical maximum RS-485 Drive Distance
| Baud Rate | 150-9600 | 19200 | 38400 | 57600 | 115200 |
| Distance (feet) | 4000 | 3200 | 3000 | 2300 | 1600 |
| Distance (meters) | 1220 | 975 | 914 | 701 | 488 |
*Note: Based on 24 AWG twisted shielded pair, 0.026 Ohm/ft (0.085 Ohm/m), 13pF/ft(41pF/m) conductor to conductor, 22 Pf/ft (72pF/m) conductor to shield.
Udgivet til: Schneider Electric Danmark
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