The following list are generally recommended limits for how many devices should be associated to a single Leviton EMHXD logger.
Additional factors that should be considered which may adjust the recommendations are the following:
- 31 total hardwired devices per RS485 port (62 total)
- 200 total devices per EMHXD (assumes ~100 datapoints per device)
- 1,024 datapoints maximum per device
- 20,000 datapoints maximum per system (200 x 100)
- 300 simultaneous incoming Modbus/TCP connections maximum
Additional factors that should be considered which may adjust the recommendations are the following:
- Logging rate
- Acceptable latency for the last device's data to be captured
- Baud rate
- Device response times
- # of separate Modbus register block(s) needed
- Frequency of communication errors
- Months/Years of offline data storage capacity
Last edited: