MR-SM4u Modbus RTU
Description
The MR-SM4u module is a Modbus RTU energy meter designed for use in building and industrial applications. Current, voltage, active power, reactive power, apparent power, and other relevant energy parameters can be measured for up to 3 phases plus neutral (L1, L2, L3, N) using current transformers with 333 mV secondary voltage or Rogowski coils with 50 mV secondary voltage. The values can be retrieved via a Modbus master. The module address, baud rate, and parity are set via two rotary switches on the front side of the module or via software. Suitable for decentralized mounting on a TH35 mounting rail according to IEC 60715 in electrical distribution cabinets.
- Connection with screw type terminal blocks
Technical Data
General Data
Modbus RTU
00 to 99
RS485 (two-wire bus)
1200 to 115200 bit/s
24 V AC/DC +/- 10 %
50 mA (AC)/30 mA (DC)
100 %
1+, 1-, 2+, 2-, 3+, 3-, 4+, 4- (using converter with voltage output/Rogowski coil)
333 mV/250 mV/225 mV/50 mV/22,5 mV AC
333 mV
400 mV
<1 mV
L1, L2, L3 (direct measurement)
184 V to 265 V AC
50 ± 5 % Hz
LED green, red, yellow
50 x 69.3 x 60 mm
100 g
-5 °C to 55 °C
-20 °C to 70 °C
max. 85 % non-condensing
IP40/IP20
EN61326-1:2021
max. 30 m
Class B, Group 1
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Accessories
Accessory of
Part number
11084115
4251394695273
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Additional Information