Socomec COUNTIS E23 and E24

Power and energy meter

COUNTIS E23 and E24 measure three-phase circuits with neutral through a direct connection up to 80 A. Both provide RS-485 Modbus, energy totals and two tariffs in four DIN modules. E24 is the MID version; E23 is a separate model, not another name for the certified meter. Neither requires external current transformers.

Socomec COUNTIS E23 and E24
  • Modbus RTU

Power and energy meter

Compatibility

Documented Modbus RTU interface

The manual documents FC03 serial reads. Socomec’s public E23 table supplies a practical single-register frequency check. This is documented compatibility, without a physical Edge test.

E23 48503050 and E24 MID 48503051. Use the public E23 table V103.18 as a best-effort starting map, then compare with the display. For E24, confirm the same points respond before expanding. Read-only monitoring.

Connect it with

For the exact serial meter identified below

  • Modbus
  • Wireless
  • Edge
  • Platforms
Power and energy meter
Interface
Gateway
Edge
Output
COUNTIS E23 and E24Socomec COUNTIS E23 and E24 RS-485 port
ZMB-31Modbus RTU to the EpiSensor wireless network
ZGW-20 GatewayHosts Edge locally
EpiSensor EdgeEdge Modbus client
Customer platformMQTT · API · files
Modbus RTU · RS-485
EpiSensor wireless
Runs locally
Optional onward data
Match the serial settings, read frequency using the example below and compare with the display. Then add measurement points to the Edge Modbus client. The customer-platform output is optional; Edge remains the local system of record.

Models

Download
ModelsInterfaceRoute into Edge
COUNTIS E23 / 48503050Direct 80 A, three-phase with neutral, RS-485 ModbusSerial monitoring; this is not the MID model.
COUNTIS E24 / 48503051MID version of the direct meter; RS-485 ModbusSame serial setup family, with specific sealing and metrological conditions. Remote RS-485 data is not itself the legally relevant indication.
COUNTIS E53Panel meter with external 5 A CT inputs in manual 536419BA different electrical and communication-table family; not a substitute configuration for E23/E24.

Specifications

Choose these meters for a direct three-phase circuit with neutral. The decision between E23 and E24 is metrological, while RS-485 settings determine how the monitoring system reaches the meter.1

Exact references
E23: 48503050. E24 MID: 48503051.1
Input and network
Direct connection up to 80 A per phase; three-phase with neutral. Reference current 5 A, not an external 5 A CT input.1
Supply
Self-powered from the measured network, 3 × 230/400 to 3 × 240/415 VAC, 50/60 Hz.1
Tariffs
Two tariffs. Choose communication or the voltage input as the tariff source; terminals 6–7 are not a dry-contact input.1
RS-485
Terminals 2 negative and 3 positive; terminal 1 is unconnected and may continue the shield. Modbus RTU, address 1–247.1
Serial choices
1200–115200 bit/s in the documented menu; none, odd or even parity; one or two stop bits.1
Mounting and enclosure
Four DIN modules, 72 × 90 × 64 mm, inside an electrical cabinet; front IP51, case IP20.1
Environment
Operating −25 to +55 °C; humidity up to 80% within the manual’s installation conditions.1
Accuracy
Manual specifies class 1 active energy and class 2 reactive energy; E24 additionally carries class B/MID conditions.1

Interface

Documented measurements and integration boundaries for COUNTIS E23 and E24.

  • Total and partial energy, with T1 and T2 tariff totals.
  • Phase voltage and current, active/reactive/apparent power, power factor and frequency.
  • Phase sequence and measurement direction support installation checks.
  • Start with frequency; add voltage and current after checking the displayed values and scale.

Assessment

E23 48503050 and E24 MID 48503051. Use the public E23 table V103.18 as a best-effort starting map, then compare with the display. For E24, confirm the same points respond before expanding. Read-only monitoring.

InteroperabilitySupported with conditions
The documented serial interface and published electrical point rows support read-only monitoring with display checks.12
AccuracySupported with conditions
Direct 80 A three-phase-plus-neutral metering is defined; E24 adds specific MID conditions rather than legal status for remote data.1
SecurityNot yet assessed
The manual does not establish authenticated or encrypted access on this serial interface.1
ReliabilitySupported with conditions
FRAM retains energy and settings; display diagnostics identify phase and device problems. Treat failed reads as missing.1
RuggednessSupported with conditions
Cabinet mounting, ingress ratings and a defined temperature/humidity envelope are documented.1
ScalabilitySupported with conditions
Addressing, termination and a standard multidrop arrangement are documented; polling capacity depends on the actual bus.1
LifecycleNot yet assessed
The documentation does not establish current production, a minimum supported firmware or a future maintenance commitment.1

Setup

First read: frequency without word-order ambiguity

The E23 public table provides a one-register frequency point. Use it as the initial read and compare with the meter display.

Function
FC03, read holding registers
Start address
51287 decimal (0xC857), raw table address. A client with one-based labels may show 51288.
Length
1 register
Decode
Unsigned 16-bit integer ÷ 1000 = Hz
Example
50000 (0xC350) ÷ 1000 = 50.0 Hz. Illustrative decode, not a measured response.

Acceptance: Keep the point when it agrees with the display. If it does not, check the address convention and installed model. Preserve the raw value and timestamps for troubleshooting.

  1. Identify the meter and network

    Record E23/48503050 or E24/48503051 and both firmware versions shown in the information menu. Confirm three-phase plus neutral and the direct connection current limit with the installer.

  2. Check local readings first

    Compare the display with the expected phase voltages, current direction and phase sequence. A missing-phase or reversed-sequence indication should be resolved before collecting energy totals.

  3. Match SETUP 2 serial settings

    Read the communication address, speed, parity and stop bits from SETUP 2 and enter the same settings in Edge. Do not use the partial-energy reset items merely to configure communications.

  4. Follow the RS-485 terminal diagram

    Use the manufacturer’s polarity labels, shield arrangement and line topology. Terminate the two bus ends as specified. The manual describes a standard 32-device, 1200 m arrangement; actual cable, loading and repeaters determine the installation.

  5. Choose how tariffs are selected

    SETUP 1 selects communication or the tariff input. The input uses 0 V for T1 and 80–276 VAC/DC for T2. Have the installer check that circuit; do not treat it as a low-voltage contact closure.

  6. Start with the published frequency point

    Read FC03 address 51287 as one unsigned 16-bit register and divide by 1000 for Hz. Compare with the display, then save the polling point. Record firmware and table revision with the configuration.

Common questions

Does E24 make RS-485 energy data legally valid for billing?
The manual explicitly excludes RS-485 information from legal metrological value. E24’s MID conditions include three-phase plus neutral, fitted and sealed terminal covers and a locked SET button. Use the metrologically relevant indication and applicable billing process.1
Is the tariff input a dry contact?
No. The wiring diagram assigns T1 at zero voltage and T2 at 80–276 VAC/DC. Communication can instead select tariffs when that source is chosen. The pulse output is a separate circuit on terminals 4–5.1
Where should I start with the register table?
Start with the single-register frequency example below. The public E23 table also lists phase-neutral voltage at 51284 to 51286 as U16 divided by 100 for volts. Compare each value with the display. Use the matching energy rows when adding totals.12
Are these meters currently available to buy?
The manufacturer retains documentation, but that does not establish present production or stock. Confirm the exact reference and support position with Socomec when specifying a new installation.1

Sources

  1. COUNTIS E23/E24 installation and operating manual, 545877B (retained official reader extract) (opens in a new tab) (PDF) Socomec
  2. COUNTIS E23 public Modbus table V103.18: electrical measurement rows (opens in a new tab) Socomec

Further reading

Product names and trademarks belong to their owners. Publication does not imply endorsement or a commercial relationship.