Socomec COUNTIS E53

Compatibility

Documented Modbus RTU interface

The documented RS-485 Modbus RTU interface connects through an isolated serial interface. The public V0.61 table supplies starting points for identification and electrical measurements.

Reference 48503011 retains the 5 A CT-secondary rating in manual 536419B. Use the public combined table as a best-effort starting map, compare the decoded values with the meter display and retain successful read settings. Keep monitoring read-only; tariff changes, resets and CT configuration belong to the installer. No prepared import or physical Edge test is included.

Connect it with

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

Models

Specifications

The retained manual defines a 5 A CT secondary, not a generic 1 A/5 A selectable input. It also separates the auxiliary supply from the voltage measurement circuit, which matters when replacing or reconnecting an installed panel meter.¹

Exact scope

COUNTIS E53, reference 48503011; manual 536419B.¹

Current input

External CTs with 5 A secondary; configured primary up to 9999 A in this manual. Permanent secondary overload 6 A is not a rated operating target.¹

Voltage measurement

Direct voltage measurement: 50–520 VAC phase-to-phase or 28–300 VAC phase-to-neutral.¹

Auxiliary supply

110–400 VAC, 50/60 Hz ±10%; or 120–350 VDC ±20%; consumption below 10 VA.¹

Networks

Three-phase three- or four-wire, two-phase two-wire and single-phase systems, using the appropriate manufacturer diagram.¹

Communication

RS-485 two- or three-wire half-duplex, JBUS/Modbus RTU; 2400–38400 bit/s.¹

Mounting

Panel case 97 × 97 × 60 mm; depth 80 mm with all optional modules. Front IP52, case IP20.¹

Accuracy

Manual specifies IEC 62053-22 class 0.5S active energy and IEC 62053-23 class 2 reactive energy; the external CT contributes additional measurement error.¹

Environment

Operating −10 to +55 °C, within the manual’s installation conditions.¹

Interface

Documented measurements and integration boundaries for COUNTIS E53.

• Total and partial active/reactive energy.
• Instantaneous active, reactive and apparent power; phase voltage/current and four-quadrant power factor.
• Four tariffs managed through the communication interface.
• Public table candidates: version at 50006, phase-neutral voltage at 50520/50522/50524 (U32 × 0.01 V), phase current at 50528/50530/50532 (U32 mA) and imported active energy at 50770 (U32 kWh). Electrical values use two registers; version uses one.

Setup

1. Identify the installed hardware

   Record E53 and reference 48503011, firmware and fitted options. Check the CT secondary against the 5 A input documented here. Do not borrow the electrical ratings of an R variant or a newer COUNTIS model.

2. Check network and transformer configuration

   Have the authorised installer confirm the network diagram and CT primary setting. Compare phase currents, voltage and power factor on the display before configuring software. CT wiring work requires the manufacturer’s safe shorting and isolation procedure.

3. Verify the separate auxiliary supply

   Check the installed auxiliary supply against the AC or DC range on the meter. A correct measurement-voltage circuit does not by itself establish that the meter has the correct auxiliary power.

4. Read the serial menu

   Record Adr, baud rate, parity and stop bits. The manual provides 2400, 4800, 9600, 19200 and 38400 bit/s, none/even/odd parity and one/two stop bits. Match the installed choices in Edge rather than assume a default.

5. Use the documented line topology

   The manual describes up to 31 meters over 1200 m in its standard RS-485 arrangement, with termination at both ends and repeaters for larger arrangements. A reference to TCP-IP alternatives does not mean this meter has a native Ethernet port.

6. Start with public register candidates

   For the initial candidate read, try FC03 (read holding registers). Record the table version at 50006 (0xC356) and software version at 50007 (0xC357), each one U16. Then try phase-neutral voltage V1 at 50520 (0xC558), two-register U32 × 0.01 V. These are table addresses; a one-based client label may be one higher. Compare decoding with the display. The measurement block includes transformer scaling, so check before adding another CT multiplier. Save the read function and word order that give the matching value.

Common questions

Can I use a 1 A CT secondary?

The retained manual specifies 5 A secondary. This guide does not extend that rating to 1 A. Check the exact hardware documentation instead of applying a newer family’s input options.¹

Does the E53 have Ethernet?

The documented interface is RS-485 RTU. The manual mentions other networking solutions, but does not establish a native Ethernet port on this E53. A serial-to-network interface is a separate component.¹

Where should I start with the register map?

Use Socomec’s public combined table V0.61 for the identification and electrical candidates above. Begin with one value and the local display rather than import every row. Keep the older E53’s 5 A input rating; a later table’s selectable 1 A/5 A setting does not change that hardware. The E23 single-register frequency example belongs to another map and should not be copied here.^1, 2

Is this a recommendation for a new installation?

It is primarily a guide to an installed E53 documented by manual 536419B. Present production, stock and future support have not been established. Confirm those with Socomec before selecting this reference for new equipment.¹