Frequency inverter
ER321

The most important advantages:

User-friendly application
Compact design
Focus on protective function

ER321 K – with protection class IP21 for control cabinet installation

ER32K/G - compact HVAC drive

- for applications with variable torque.

HVAC-LINE

Frequency inverter for speed adjustment of DS asynchronous motors, 0.75 to 75.0 kW, 380 to 480 V, 3~, protection class IP21 and IP54/55

As a further development of the successful ER32, the new product range offers optimum solutions for applications with variable torque – ideal for fans and pumps in building technology as well as in sewage and water treatment plants.

Developed in accordance with current international standards such as EMC and EN 61000-3-12, the series impresses with maximum environmental compatibility, e.g. through lead-free soldering and excellent recyclability.

Product variations

The advantages

Frequency inverter ER321

Areas of application

Product information

The ER321 is available in two versions ER321-…K, protection class IP21 and ER321-…G, protection class IP54/55 with(-V2) and without(-V1) additional switches. The ER321 is designed with a 4-digit 7-segment display. 7 buttons allow easy programming and control of the device from the display. The Local/Remote button is used to switch between the display and the control terminal strip. A multilingual plain text display is now available as an option.

Standard features

4-digit 7-segment display
Optional: multilingual plain text display
4 pre-programmed application macros
built-in PID controller
Modbus, METASYS N2, BACnet, APOGEE FLN P1
via RJ 45, RS 485, optional LonWorks
integrated EMC filter
PTC thermistor input
Maximum THDI: 35%, EN 61000-3-12
RoHs compliant
CE, UL, CSA, NOM 117, C-Tick

Standards

The ER321 series frequency inverters have a mains filter integrated in the device, are CE marked in accordance with the EU Low Voltage and EMC Directives and comply with the applicable standards for frequency inverters EN 61800-3 and -5-1.

Product inquiry

Our innovative product range is designed for variable torque applications, such as building services, sewage treatment plants and waterworks. In the following you can configure your ER321 according to your individual ideas and get a corresponding offer directly from us.

Frequently asked questions

to the ER321 frequency inverter

What is the factory setting of the ER321 drive ?

Guidelines for the operation of frequency inverters

To achieve electromagnetic compatibility, the inverter must be operated with a built-in or external RFI filter.
When using shielded cables between the inverter and the motor, the shield must be connected to earth at both ends. Cable interruptions should be avoided as far as possible. If it is necessary to separate the cable, e.g. in order to install a motor contactor, then the cable shielding must be connected through as directly as possible. It is important to ensure that the lowest possible HF impedance is achieved.
The shorter the cable, the lower the radio interference and leakage current. The maximum possible cable lengths must be taken into account.
To avoid interference with the control inputs, control cables should always be shielded. The shield must be connected to the cable clamp provided on the inverter. If the shield is also connected to a control unit, ensure that the ground points are at the same potential.
Control cables should not cross power cables if possible. Where this cannot be avoided, a right-angle intersection is recommended.
Separate routing of control and power cables should be aimed for. If the cables have to be laid in parallel, e.g. on the same cable route, the greatest possible distance (> 20 cm) should be chosen.
The shielding of the installed cables should have a low RF impedance if possible. Therefore, copper braiding is preferable to steel braiding.
The HF contact resistance at the connection points between the shielding and the housing must be kept as low as possible. Dirt, paint and insulation residues on the housing and shielding in the area of the connections must therefore be removed. In principle, the cable clamps or crimp connections provided for this purpose should be used to connect the shielding. The use of earthing glands is advantageous.
The shielding should be applied to the housing as close as possible to the cable terminals. Longer, free cable ends act as antennas.
For unshielded cables, the cable cores should be twisted and output filters should be used.

How do I deactivate the motor phase monitoring (OPL) error 'EPHO'?

Code F 605 = 0 = deactivated (page 17 and 129 in the programming instructions)

How can I do an error reset via the stop button?

Set F735 = 0 (page 80 in the programming instructions)
Press the stop button 2x quickly.

What does my error message in the display mean?

The tables on page 150 in the programming instructions are used to diagnose and rectify problems if an error, alarm or pre-alarm condition occurs. If the problem cannot be solved by the measures described in the table, contact your BLEMO dealer

Downloads ER321

All important downloads for ER321

German

English

Russian

Our service world

The focus is always on people. Not machines.

Efficient, perfectly functioning technology is the basis of everything. However, it is advice, proximity, and service that make the decisive difference. That is why we focus on personal contact, clear coordination, and support that really helps in everyday life.

Your personal contact person

The focus is always on people. Not machines.

B.Eng. Marc Scherer
Managing Director

Frequency inverterER321

ER32K/G - compact HVAC drive

- for applications with variable torque.

Product variations

The advantages

Frequency inverter ER321

Areas of application

Product information

Product inquiry

Frequently asked questions

to the ER321 frequency inverter

Downloads ER321

Customers also bought

Our service world

The focus is always on people. Not machines.

The focus is always on people. Not machines.

Frequency inverter
ER321