Janitza power analyzers

Last modified: 2025-10-31

Device	Connections via Modbus TCP	Connection via Modbus RTU
Device	Connections via Modbus TCP	blue’Log	Janitza
UMG 96		RS485 – A RS485 – B	RS485 – A (17) RS485 – B (16)
UMG 96 RM-E		RS485 – A RS485 – B	RS485 – A (17) RS485 – B (16)
UMG 96 RM-P		RS485 – A RS485 – B	RS485 – A (17) RS485 – B (16)
UMG 103 CBM		RS485 – A RS485 – B	RS485 – A (2) RS485 – B (3)
UMG 104		RS485 – A RS485 – B	RS485 – A (23) RS485 – B (22)
UMG 508		RS485 – A RS485 – B	9-pole DSUB socket
UMG 509		RS485 – A RS485 – B	RS485 – A (2) RS485 – B (3)
UMG 511		RS485 – A RS485 – B	9-pole DSUB socket
UMG 512		RS485 – A RS485 – B	RS485 – A (2) RS485 – B (3)
UMG 604		RS485 – A RS485 – B	RS485 – A (23) RS485 – B (22)
UMG 605		RS485 – A RS485 – B	RS485 – A (23) RS485 – B (22)

For connections via Modbus TCP

Set the network parameters for the power quality analyzer. Data logger and power analyzer must be on the same subnet (net mask).

For connection via Modbus RTU

Set the bus address on the power analyzer (see power quality analyzer documentation).
If the device is the last one on the RS485 bus, terminate the bus with a 120 Ω terminating resistor.
To ensure sufficient query speed for the power control, it is recommended to operate the power analyzer as a single device on the bus.