BITUO TECHNIK SDM01

Compatibility

Compatible with EpiSensor Edge over Zigbee.

Pair it with the Zigbee radio on an EpiSensor Gateway. Edge reads it locally on the Gateway.

Edge reads 24 values from it, listed under Interface.

Connect it with

• 
  Gateway ZGW-20
  From €899 ex VAT Configure Gateway

Specifications

The SDM01 is a three-phase energy monitor made by Shanghai Bituo Electric under the BITUO TECHNIK name. One 18 mm module sits on the DIN rail and takes four voltage leads, X, Y, Z and N. Three split-core current transformers clip around the phase conductors, so nothing has to be disconnected to fit them. It measures voltage, current, power and energy on each phase, in both directions.¹

Power

Mains. Powered from its voltage leads at 220 to 240 V AC, drawing no more than 2 VA.¹

System

3P+N, or up to three 1P+N branch circuits; not for three-phase three-wire¹

Rated voltage

220 to 240 V AC phase to neutral, 380 to 415 V AC phase to phase, 50/60 Hz¹

Maximum current

120 A or 200 A per phase, by current transformer¹

Current transformers

Three split-core: 120 A with 16 mm opening, or 200 A with 20 mm opening¹

Accuracy (IEC 61557-12)

Voltage Class 0.5; current, active power and forward active energy Class 1¹

Own consumption

2 VA maximum¹

Operating temperature

-25 to 70 °C¹

Monitor dimensions (H × W × D)

113.7 × 18.0 × 65.9 mm¹

Mounting

35 mm DIN rail, one module wide¹

Protection

IP20, overvoltage category III, pollution degree 3¹

Insulation

440 V rated insulation, 4 kV impulse withstand¹

Zigbee module

Tuya ZS3L (Silicon Labs EFR32MG21)¹

Standards

IEC 61557-12, IEC 61326-1, ETSI EN 300 328, ETSI EN 301 489-1 and -17¹

Reporting interval

5 to 3600 s, set from Edge³

Where it is used

• The incomer and main feeders of a small commercial board, up to 200 A per phase, without breaking the circuit to fit the transformers.

  Transformer and distribution board monitoring

• Export limitation and self-consumption on a site with solar generation, from the energy measured in both directions.

  Solar PV monitoring

• Dynamic load balancing for EV chargers against the capacity of the supply.

  EV charging load management

Interface

Readings and settings, with units and ranges where BITUO TECHNIK publishes them. R readable, W writable only.

The Zigbee definition for this firmware is known to be incomplete. Check each phase against a clamp meter after pairing before you rely on the totals.³

The reporting interval is a write-only setting from 5 to 3600 seconds: Edge can set it, but the meter has no datapoint that reads it back.³

Voltage is reported in steps of 0.1 V, current in 0.001 A, energy in 0.01 kWh and frequency in 0.01 Hz. Power factor is a percentage.³

Setup

1. Mount and wire the monitor

   With the supply off, clip the monitor onto a 35 mm DIN rail and connect the X, Y, Z and N voltage leads. Bituo says only qualified electricians should install, operate or service it.¹

2. Fit the current transformers

   Match each transformer's calibration ID to the monitor, connect its red wire to + and black wire to - on the X, Y or Z input, and close it around the matching phase with the arrow in the direction of normal flow. Make sure the clasp locks.¹

3. Put it into pairing mode

   Open pairing on the Gateway's Zigbee network in Edge, then press and hold the reset button for 3 to 5 seconds. The ACT LED shows the network state and the AL LED flashes on an alarm or error.¹

4. Check each phase

   Compare each phase voltage and current with a clamp meter. If one phase counts produced energy on a consumption circuit, that transformer faces the wrong way or sits on the wrong phase.