Socomec DIRIS A-40

Compatibility

Compatible with EpiSensor Edge over Modbus RTU and Modbus TCP.

Connect its RS-485 port to a Modbus Interface or to a serial interface on the Gateway, or use its Ethernet port for Modbus TCP. Edge polls it with its Modbus client.

Edge reads 32 values from it, listed under Interface.

Connect it with

• 
  Modbus Interface ZMB-3X
  From €399 ex VAT Configure Modbus Interface
• 
  Gateway ZGW-20
  From €899 ex VAT Configure Gateway

Specifications

The DIRIS A-40 is Socomec's panel-mounted multifunction meter, a performance measuring and monitoring device to IEC 61557-12 in a 96 × 96 mm format. It measures single-phase and three-phase networks, with or without neutral, from 50 to 300 V phase to neutral, and higher voltages through voltage transformers. It has three digital inputs and two outputs.¹

Power

Mains. Auxiliary supply of 110 to 277 V AC phase to neutral, 277 to 400 V AC phase to phase, or 120 to 300 V DC, at 50 or 60 Hz. The Modbus version draws 4 VA at 110 to 277 V AC; the Ethernet and Profibus versions 6 VA.¹

Active energy and power accuracy

Class 0.5 with TE, iTR or TF sensors; Class 1 with TR sensors; Class 0.2 for the meter alone (IEC 61557-12)¹

Reactive energy accuracy

Class 2¹

Voltage inputs

50 to 300 V AC L-N, 87 to 520 V AC L-L, CAT III; VT primary up to 400,000 V¹

Current inputs

3, for Socomec TE, TR, iTR and TF sensors; 1 A or 5 A transformers through an adapter¹

Power quality

Harmonics to the 63rd, THD, TDD, unbalance, K-factor, EN 50160 dips, swells and interruptions¹

Inputs and outputs

3 optocoupler inputs, 2 optocoupler outputs (30 V DC, 20 mA)¹

References

4825 0500 (Modbus), 4825 0501 (Modbus and Ethernet), 4825 0502 (Modbus and Profibus)¹

Protection

IP52 front, IP20 rear¹

Operating temperature

-10 to 70 °C¹

Weight

326 g (4825 0500) to 349 g (4825 0502)¹

Where it is used

• Incomers and feeders in low-voltage switchboards, with split-core sensors where the cables cannot be disconnected.

  Transformer and distribution board monitoring

• Power quality and harmonics on circuits feeding IT, UPS and drive loads.

  Data centre power monitoring and PUE inputs

• Bringing Socomec meters on an RS-485 bus or the site network into a BMS or SCADA system through Edge.

  Modbus meter integration for a BMS or SCADA system

Interface

Socomec lists every address in decimal and hexadecimal. The decimal address is the one sent on the bus: total active power is 18476 (0x482C).²

Scaling is in the table's units: voltage in 0.01 V, current in mA, frequency in mHz and power factor in thousandths. Each whole kWh counter has a residual register beside it in 0.1 Wh steps, which the map leaves out.²

This page covers references 4825 0500, 4825 0501 and 4825 0502. Check the reference on the label before you use the map on an older DIRIS A40 or A41.¹

Setup

1. Fit the current sensors

   Plug a TE, TR, iTR or TF sensor into each current input with Socomec's RJ12 cable. The meter reads each sensor's type and rating, and raises a system alarm for a missing sensor, a current that does not match its voltage, or the wrong phase rotation.¹

2. Wire the bus

   Run LiYCY shielded twisted pair from the meter's RS-485 terminals to a ZMB-31 or the Gateway's serial interface. Keep to 32 devices and 1,200 m per segment and fit 120 Ω at both ends.¹

3. Set the communication

   Set the address, baud rate, parity and stop bits on the touchscreen or with Easy Config over the micro USB port, then set Edge to match. On 4825 0501, set DHCP or a fixed IP address for Modbus TCP on port 502.¹

4. Read one register

   Import the template and read Voltage L1-N at 18444 with function code 3. It is an unsigned 32-bit value in 0.01 V, so 23012 means 230.12 V.²

5. Enable the map

   Once voltage, current and total active power match the screen, enable the rest of the map and watch several fresh readings before you add exports or alarms.

Common questions

Can the DIRIS A-40 use standard 5 A current transformers?

Yes, through Socomec's 5 A adapter, up to 10000/5 A or 2000/1 A. The combined accuracy then depends on the transformer, because Socomec only states the chain accuracy for its own TE, TR, iTR and TF sensors.¹

Which address holds total active power?

18476 (0x482C), read with function code 3 as a signed 32-bit value in watts.²

How are energy counters stored?

Each total is a 32-bit counter of whole kWh, kvarh or kVAh, followed by a 16-bit residual below one unit, in steps of 0.1 Wh for active energy. Imported active energy starts at 19843 and exported active energy at 19846.²

What is the default IP address of the Ethernet version?

The web server on reference 4825 0501 answers at 192.168.0.4 until you change it.¹