SOCOMEC DIRIS 48250201 Multi-function Power Meter

Brand: SOCOMEC

Model Code: DIRIS 48250201

Product Series: DIRIS A40 Multi-function Power Meter

Complete Order Code: 48250201

Core Information

1. Full Product Name

DIRIS A40 Multi-function Energy / Power Monitoring Meter

Order Code: 48250201

2. Standard Configuration (Model 48250201)

Measurement: Three-phase voltage, current, power, power factor, harmonic, energy metering

Communication: Modbus RS485

Dimension: 96×96mm panel mounting

Power supply: AC/DC 80–270V

Input: Direct voltage input up to 480V; current input requires external CT

Functions: Demand, THD harmonic, event logging, time-of-use energy

Output: Basic version without built-in I/O (Select other variants for relay/pulse output)

3. Reference for Distinguishing Similar Models

48250201: DIRIS A40, Modbus, No I/O

48250202: Version with pulse output

48250203: Version with digital input / relay output

Typical Applications

Low-voltage switchgear, busbar cabinets, UPS incoming feeders, data center power distribution, factory energy consumption monitoring; interfacing with SCADA, PLC and energy management systems.

Alternative Options

Original direct replacement: DIRIS A40 series;

Domestic alternatives: Nayu, Yada, Acrel multi-function network power meters (Modbus register compatibility verification required).

Modbus RTU Register Summary for SOCOMEC DIRIS A40 (Order No. 48250201)

Important Prerequisites

1. Protocol: Modbus RTU, Function Code 03 (Read Holding Registers). All measurement data are stored in holding registers;
2. Data format: 32-bit signed/unsigned integer (occupies two consecutive 16-bit registers, Big-Endian, high word first);
3. Address in manual = decimal offset address (PDU address, starts at 0)

For configuration software using 4xxxx format: Offset address + 40001

Example: Offset 786 → Register 40787

4. Raw values need scaling division to obtain actual engineering values;
5. Two sets of register maps exist: Old map (Firmware ≤2008) / New map (Firmware ≥2009). The table below is the new standard register map used for most field devices.
6. Default Communication Parameters

Slave address: 1

Baud rate: 9600

Data bits: 8, Stop bits: 1, Parity: None

Parameters can be modified via front panel menu

2. Common Real-Time Measurement Registers (PDU Offset, FC03)

3. Energy Metering Registers (Energy Counter, 32-bit Unsigned)

⚠️ Model 48250201 basic version has no pulse output or DI/DO; I/O status registers are not required.

4. Reading Example

Read Total Active Power: Offset address 806, read 2 consecutive registers

Returned data [High Word, Low Word] forms a 32-bit integer → Value ÷100 = kW

Example: Raw reading = 12560 → 12560 /100 = 125.60 kW

5. Common Pitfalls & Notes
6. Word Order: DIRIS A40 uses Big-Endian (high register = high 16-bit). Most configuration software supports this natively; some drivers require manual swap of high/low word.
7. Incompatibility between old and new firmware register maps

All readings equal zero: Likely old firmware register map (starts at 0x700).

3. CT/PT Ratio: After ratio setting inside the meter, register values already represent primary-side actual values. Do NOT multiply by transformer ratio again.
4. Avoid reading excessive continuous registers in one request; limit to ≤20 registers per command to prevent communication errors.
5. Extended registers for harmonic, THD, maximum demand and event logs are available and generally unnecessary for conventional data acquisition.
6. Access Official Full PDF Document

Official Manual Reference: 536103B (DIRIS A40/A41 Modbus communication manual), containing complete register list, alarm parameters and write registers.

Procedure to Modify RS485 Modbus Communication Parameters via Front Panel for SOCOMEC DIRIS A40 (48250201)

Front Panel Button Definition (96×96 Model)

◀ LEFT: Cursor left / Scroll up

▶ RIGHT: Cursor right / Enter & Confirm

▲ UP: Value increase / Scroll up

▼ DOWN: Value decrease / Scroll down

Default Administrator Password: 100

Default Communication Settings: Slave address=1, Baud rate=9600, Data bits=8, Stop bits=1, Parity=None

Step-by-Step Operation

Step 1: Enter Configuration Menu

Meter displays normal measurement screen (voltage/current view)

1. Long press [▶ RIGHT] confirm key for 3～5 seconds
2. Screen prompts CODE ?, password input required

Step 2: Input Password 100

▲ UP: Increment digit

▶ RIGHT: Shift cursor to next digit

Set digits sequentially: `1` → `0` → `0`

After input, long press [▶ RIGHT] to enter main configuration menu

Step 3: Navigate to Communication Menu

Scroll using ▲ / ▼ to locate:

RS485 COMMUNICATION

Press ▶ RIGHT to enter submenu

Step 4: Modify Communication Parameters Item by Item

Four configurable items:

1. COM ADR (Modbus Slave Address)

Range: 1～247. Ensure unique address for each meter on the bus.

▶ Enter → Adjust value via ▲▼ → ▶ Confirm

2. BAUD (Baud Rate)

Options: 1200 / 2400 / 4800 / 9600 / 19200 / 38400 / 57600 /115200

3. PARITY

NO: No parity (Recommended for site use)

EVEN: Even parity

ODD: dd parity

4. STOP BIT

1 / 2; Standard site setting: 1

⚠️ Critical: Host device (PLC/Gateway/Modbus Poll) parameters must match the meter exactly, otherwise communication failure occurs.

Step 5: Save and Exit

After all parameters modified:

1. Scroll to EXIT using ▲▼
2. Press ▶ RIGHT to confirm exit
3. Prompt SAVE? YES/NO

Select YES to save; select NO to discard all changes.

After successful saving, meter automatically returns to measurement main screen. New communication settings take effect immediately.

⚠️ Common Faults & Reminders

1. Forgotten Password 100

Panel modification unavailable. Two solutions:

① Use Easy Config software via RS485 to read or reset password;

② Factory reset (CT ratio, energy data will be cleared. Proceed with caution).

2. Troubleshooting checklist if communication fails after parameter modification

No duplicated slave addresses; baud rate, parity and stop bits fully matched

RS485 wiring: A to A, B to B. Do not reverse polarity

120Ω terminating resistor at bus end to be deployed as required

Confirm model 48250201 integrates built-in RS485; no extra communication module required

3. Menu Language

Older firmware: English menu `RS485 COMM`

Newer firmware: Chinese menu supported RS485通讯

Recommended Parameter Template