Janitza EMD 485-P1 Handleiding

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Introduction

This document provides instructions for

installation, operation, and maintenance.

Device description

The energy meter (device) with back-lighted LCD

screen is designed for single-phase applications

in industrial, utility and residential areas. It

measures important electrical parameters like

voltage, frequency, current, power, active and

reactive energy. The energy measurement is

bidirectional, i.e. imported and exported energy

are measured separately, so that, for example,

the solar gain of a PV system can also be

recorded.

The maximum demand (current and power)

can be measured over preset periods of up to

60minutes.

The device provides an RS485 serial port with

Modbus RTU protocol for communication and

to enable remote monitoring and control of the

device.

Intended use

The MID-certified device is intended for the

following uses:

• Measurement of power and cumulative energy

in accordance with classC EN50470-3/

ANSIC12-20:2010 in single-phase networks

(1p2w).

• Installation in wheather-protected switchboard

cabinets and small distribution boards in

industrial and residential environments. The

installation position is arbitrary.

• For indoor use only.

• Use in accordance with national specifications.

Improper use:

The following is considered improper use in the

sense of foreseeable misuse:

• Operation outside the specifications, e.g.,

regarding operating/measuring voltage or

current, environmental specifications, etc.

• Too high or wrong external back-up fuse (see

fig.3).

• Installation in vehicles! Use of the device

in non-stationary equipment constitutes an

exceptional environmental condition and is

only permissible by special agreement.

• Installation in environments with harmful oils,

acids, gases, vapors, dusts, radiation, etc.

Safety precautions

• During normal operation, life-threatening

voltages may be present at some terminals

of this device. Installation, operation, and

maintenance must only be carried out by

qualified and trained personnel in compliance

with local regulations.

Ensure that all power supplies are de-

energized before connecting the device or

performing any other work.

• After installation, the terminals must not be

accessible to the user. The external installation

precautions must be sufficient to prevent

hazards under fault conditions.

• This device is not intended to function as part

of a system that serves as the sole means of

protection against faults – good engineering

N in

N out

L in

100 A

L out

56789

56789

Figure 3. Wiring diagram

• Connect RS485 and/or digital inputs if

required.

1.EMD485P1

A

B

Figure 4. Connection of RS485 and digital inputs

Start-up displays

When it is powered on, the meter initializes and

performs a self-check.

All display

segments light up

Software version

Additional internal

version number

Self-test ok

*After a short delay, the display shows the

measurement display for total active energy

(kWh). This is the default display.

Button functions

The buttons operate as follows:

Scroll button: To display the next

measurement value.

In setup mode additionally:

To increase the flashing digit.

Enter button (setup mode only):

Press shortly to confirm the digit

and select the next digit.

Press and hold for 3seconds to

enter the setting mode and to

confirm the entered value.

Measured value displays

To view the next measurement value, press the

Scroll button .

Note: You can activate automatic scrolling

between the measurement displays in the setup

menu. If enabled, each display is shown for an

adjustable time until it automatically switches to

the next one.

Total active energy

Example: 0.01kWh

Imported active energy

Example: 0.01kWh

Exported active energy

Example: 0.00kWh

Total resettable active

energy

Example: 0.01kWh

0

kVArh

0

kVArh

0

0

kWh

kWh

Imported active energy,

resettable

0

kVArh

0

kVArh

0

0

kWh

kWh

Exported active energy,

resettable

Total reactive energy

Example: 1.00kVArh

Imported reactive

energy

Example: 0.6kVArh

Exported reactive

energy

Example: 0.4kVArh

Total reactive energy,

resettable

Example: 1.00kVArh

0

kVArh

0

kVArh

0

0

kWh

kWh

Imported reactive

energy, resettable

0

kVArh

0

kVArh

0

0

kWh

kWh

Exported reactive

energy resettable

Total maximum power

demand

Example: 6000W

Voltage

Example: 229.8V

Current

Example: 10A

Active power

Example: 2297W

Reactive power

Example: 1.5VAr

Apparent power

Example: 2298VA

Power factor

Example: 0.999

Frequency

Example: 50.00Hz

Digital input 1 counter

value

Digital input 2 counter

value

Modbus address

Example: 003

Baud rate

Example: 115200

Continuous running

time in total

Example: 0.2h

practice requires that each critical function

is protected by at least two independent and

different means.

• The device does not have an internal fuse.

Upstream fuses for line protection are required

in all phases. If the circuit is faulty or abnormal,

the fuse will blow quickly for line protection

and safety.

• Install and operate the device according to the

Technical Data specified in this manual.

• If this device is manipulated or used in a

manner not specified by the manufacturer,

the protection provided by the device may be

impaired.

Characteristics

The device can measure and display:

• Grid voltage and frequency

• Current

• Power, maximum power demand, and power

factor

• Active energy (imported and exported)

• Reactive energy (imported and exported)

The password-protected setup menu allows to:

• Configure the device, e.g., Modbus

parameters, display settings, demand interval

time

• Reset the maximum power demand and

resettable energy values

• Change the password

Features

• Certified according to the Measuring

Instruments Directive (MID) 2014/32/EU

• Up to 100 A alternating current measurement

• Bi-directional energy measurement IMP &

EXP

• RS485 Modbus RTU for remote monitoring

and setup

• Back-lighted LCD display enables good

readability

• Two digital inputs as counters

• Din rail mounting 35mm (DINEN60715)

• Accuracy class 0.5 / C active energy

Dimensions

Figure 1. Dimensions

Installation

WARNING

Risk of injury from electrical voltage!

Touching live wires or exposed conductors

and touching dangerous device inputs can

cause severe physical harm or death.

·Switch off your installation before

starting any work! Secure the equip-

ment against being switched on!

·Verify that it is disconnected from

power! Ground and short-circuit!

·Cover or block any nearby live parts!

Observe all safety precautions before

installation!

• Mount the device on a 35mm mounting rail

in a switchboard cabinet or small distribution

board.

DIN Rail

Figure 2. Energy meter mounted on Din rail

• Connect the line inputs to terminals 1-4 as

shown in fig.3. The terminals have 25mm²

connecting capacity.

Doc. no. 2.100.144.1.d 10/2025Part. no. 3303911

MID Energy Meter

EMD485-P1

User manual

www.janitza.com

Janitza electronics GmbH

Vor dem Polstück 6

D-35633 Lahnau | Germany

Support +49 6441 9642-22

[email protected] | www.janitza.com

The device front may deviate!

Product specificaties