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Modbus RTU meters: Difference between revisions

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= Modbus RTU meters =
= Modbus RTU meters =
== Eastron SDM 230-M (1PH) and SDM 72D-M (3PH)  ==
=== Description ===
Modbus RTU meters are a stable and efficient solution, especially when the electrical cabinet already requires to be cleaned up and adapted for an EV charger installation. Since the connection is wired it ensures a great latency and can be of help in especially low power or high-power installations, where even small delays are relevant to be addressed immediately. Robust and industrial solution for long time usage. Good for places with unstable Wi-Fi connectivity. 1 phase and 3 phase versions available.
=== Datasheets ===
[[Media:SDM230 series Datasheet.pdf|SDM230 series Datasheet]]
[[Media:EASTRON SDM72D-M DATASHEET.pdf|EASTRON SDM72D-M datasheet]]
=== Manual ===
[[Media:SDM230-M MID datasheet.pdf|SDM230-M MID manual]]
[[Media:SDM72D-M user manual.pdf|SDM72D-M user manual]]
=== Certification and declarations ===
[[Media:Eastron SDM230 Declaration.pdf|Eastron SDM230 MID]]
[[Media:Eastron SDM72 MID.pdf|Eastron SDM72 MID]]
=== Wiring scheme ===
[https://wiki.teltonika-energy.com/images/5/53/Eastron_sdm72.png SDM 72D-M Wiring scheme]
=== Set up ===
[[Eastron_settings|Settings]]
[[Dynamic_Load_Balancing_EVC2#SMART_METER_AND_TELTOCHARGE_COMMUNICATION|Set up]]
=== Technical data ===
{| class="wikitable"
|Model
| colspan="3" | SDM72D/BR/BI
|-
|Nominal voltage(Un)
| colspan="3" | 3x230/400 V ac
|-
|Operational voltage
| colspan="3" | 80%~120% of Un
|-
|Insulation capabilities - AC voltage withstand
| colspan="3" | 4kV for 1 minute
|-
|Insulation capabilities - Impulse voltage withstand
| colspan="3" | 6kV-1.2µS
|-
|Basic current (Ib)
| colspan="3" | 10A
|-
|Maximum rated current (Imax)
| colspan="3" | 100A
|-
|Operational current range
| colspan="3" | 0.4% Ib–Imax
|-
|Over current withstand
| colspan="3" | 30 Imax for 0.01s
|-
|Operational frequency range
| colspan="3" | 50 or 60Hz
|-
|Power consumption per phase
| colspan="3" | ≤2W/10VA
|-
|Pulse output
| colspan="3" | 1000imp/kWh
|-
|Display
| colspan="3" | LCD
|-
|Max reading
| colspan="3" | 999999.9 kWh
|-
! colspan="4" | Performance criteria
|-
|Operating humidity
| colspan="3" | ≤90%
|-
|Storage humidity
| colspan="3" | ≤95%
|-
|Operating temperature
| colspan="3" | -25°C ~ +55°C
|-
|Storage temperature
| colspan="3" | -40°C ~ +70°C
|-
|Reference temperature
| colspan="3" | 23°C ± 2°C
|-
|International standard
| colspan="3" | IEC 62053-21 / EN50470-1/3
|-
! colspan="4" | Additional characteristics
|-
|Accuracy class
| colspan="3" | Class1/Class B
|-
|Installation category
| colspan="3" | CAT III
|-
|Mechanical environment
| colspan="3" | M1
|-
|Electromagnetic environment
| colspan="3" | E2
|-
|Degree of pollution
| colspan="3" | 2
|-
|Protection against penetration of dust and water
| colspan="3" | IP51 (indoor)
|-
|Insulating encased meter or protective class
| colspan="3" | II
|-
|Altitude
| colspan="3" | up to 2000m
|-
|Electrostatic discharges
| colspan="3" | 8kV contact / 15kV air gap
|-
|Electromagnetic HF fields
| colspan="3" | IEC 61000-4-3
|-
|Electrical fast transients
| colspan="3" | 4kV
|-
|Surge
| colspan="3" | 4kV
|-
|Radiated & conducted emissions
| colspan="3" | EN 55022
|-
! colspan="4" | Modbus
|-
|Bus type
| colspan="3" | RS485 (semi-duplex)
|-
|Protocol
| colspan="3" | Modbus RTU
|-
|Baud rate
| colspan="3" | 1200/2400/4800/9600bps
|-
|Address range
| colspan="3" | 1–247
|-
|Max. bus loading
| colspan="3" | 64 pcs
|-
|Communication distance
| colspan="3" | 1000M
|-
|Parity
| colspan="3" | EVEN/ODD/NONE
|-
|Data bit
| colspan="3" | 8
|-
|Stop bit
| colspan="3" | 1
|}


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Latest revision as of 09:17, 20 October 2026

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