LamaPLC: XTM35SC Modbus communication
Other unit names:
The XTM35SC is an inexpensive current meter that can be purchased (e.g. on Amazon). It measures consumption, voltage and current on one phase. It does not require an external measuring ring. Suitable for home automation and smaller equipment. Of course, it is not MID compliant. The measurement results can also be queried remotely via Modbus RTU communication.
Description:
35 mm standard rail mounting according to the DIN EN50022 standard.
Bipolar width (module 17.5mm), conforms to the DIN43880 standard
Standard configuration 5 + 1 digit display (9999999.1kWh) LCD. Function can be selected (display voltage current, power, frequency, power factor).
Setup measurement single-phase two-wire active energy consumption. It's nothing to do with the direction of load current flow. Compliance with
GB / T17245.321-2008 standard.
Specification:
Power supply: 230V, 1 phase
Current: 5 (80) A
Accuracy class: 1.0
Frequency: 50/60Hz
Display mode: LCD 5+1 digits = 99999.9 kWh
Power Consumption: ⇐0.4W (8VA)
Temperature range: -20 to 65 °C
LED: 1 flashing / pulsing
Pulse output: 1000 imp/kWh
Voltage: 12 to 27V
Current: 27mA
Pulse value: 90 ms
Model: XTM35SC
Accuracy: Class 1
Voltage: 220V
Current: 5(30A 15/15(60A Optional (optional)
Insulation performance: AC voltage 4kv for 1 minute, 1.2/50us waveform pulse voltage 6kv
Size: 80 x 65 x 35mm / 3.15 x 2.56 x 1.38inch
Wiring
Modbus maps
RS485 communication interface, MODBUS RTU protocol:
Baudrate: 9600 Baud
Parity: Even
Databits: 8
Stopbits: 1
The registers are read-only.
Register Nr | 32 bit address | Description | Note |
30000 | 0 | Voltage (V) |
30008 | 4 | Current (A) |
30018 | 9 | Power (W) |
30026 | 13 | Volt-ampere reactive (var) |
30042 | 21 | Power factor - Leistungsfaktor (pf - W/VA) |
30054 | 27 | Frequency - Frequenz (Hz) |
30256 | 128 | Energy - Energie (kWh) |
32 bit (2 words) holding registers
The registers are read / write.
Register Nr | 32 bit address | Description | Note |
40000 | 0 | Baudrate | Default value: 9600 |
40008 | 4 | - | - |
40012 | 6 | - | - |
40016 | 8 | Modbus RTU Address | Default value: 45 |
40024 | 12 | - | Default value: 1000 |
40032 | 16 | - | - |
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