Frequency converter
ER24G

The most important advantages:

Increased protection class
Unique security feature
Low maintenance

ER24 G – Version 2 – IP65

ER24 G – the universal drive

for all applications with synchronous motors and asynchronous motors.

COMPACT-LINE

Frequency converters with IP65/66 protection for speed control of synchronous and asynchronous motors, 0.18 to 7.5 kW, -200 to 500 V, 1~ and 3~.

The ER24G frequency converter is a further development of the proven ER22G series and was designed for modern requirements in mechanical and plant engineering. It is suitable for both synchronous and asynchronous motors and impresses with its high functionality, easy integration, and reliable operation in demanding applications.

New features include the integrated safety functions STO, SLS, SS1, SMS, and GDL, a direct PTC input, and an integrated synchronous motor function in open-loop mode. In addition, programmable function blocks enable the implementation of logical and arithmetic functions, timers, counters, comparators, and short automation sequences directly in the drive.

For maximum robustness, the protection class was increased to IP66 in version 1 (V1). Version 2 (V2) with integrated switches offers IP65 and is ideal for fast, practical use in the field.

Product variations

The advantages

Frequency inverter ER24 G

Areas of application

Product information

The ER24G is a compact frequency converter for precise speed control of asynchronous and synchronous motors. It reduces energy consumption, protects the motor and mechanics, and can be quickly parameterized.

Version 2 is designed as a complete device that is ready for immediate use.
The main switch, setpoint potentiometer, start/stop, and direction of rotation are integrated, which means less wiring is required.

Standard features

150 application-specific functions
varnished boards
RoHs, WEEE compliant (recycling rate: 88%)
CE, UL, CSA, RCM, EAC, ATEX

Integrated

4-digit 7-segment display
EMC filter (IEC 61800-5-1)
PTC thermistor input
Input STO (also dual-channel)
PID controller
Modbus, CANopen

Optional

multilingual plain text display
PROFIBUS DP V1, DeviceNet, EtherCAT, Ethernet/IP, Modbus TCP, POWERLINK and ProfiNet

Integrated security

STO – Safe Torque Off:
Free coasting to a standstill by disconnecting the motor torque.
SLS – Safe reduced speed:
Braking, maintaining a predefined speed.
SS1 – Safe stop:
Stopping the motor according to a predefined, safely monitored ramp. Checks whether the motor is completely stopped or has reached a minimum predefined speed; then activates the STO function.
SMS – Safe monitoring of two motor speeds:
STO is activated when the limit speeds are reached.
GDL – Safe release of safety doors:
Safe control of safety doors with delayed safe exit.
Safety Integrity Level (SIL 1, 2, or 3)
in accordance with IEC 61508 (Parts 1 and 2)
Performance Level (PL e)
in accordance with ISO 13849-1/-2 Category 3

Synchronous motors

The new control algorithm up to 599 Hz for permanently excited synchronous motors without feedback ensures optimized performance and easy connection of the motors. The sensorless vector control provides full torque from the lowest speeds. The patented pole wheel position measurement supports all synchronous motor types and also stepper motors.

Versions

Version 1:
Basic unit without built-in switches and setpoint potentiometer, protection class IP66.
Version 1S:
Basic unit, built-in: lockable load break switch, black
Version 2:
Complete device, built-in components: lockable red load break switch, setpoint potentiometer, and start/stop or direction of rotation selection switch, protection class IP65.
Version 4:
FU/mains (emergency) mode switch, setpoint switch, setpoint potentiometer, protection class IP65
Version 7:
Basic unit with built-in 5-stage switch, protection class IP65.

product inquiry

The ER24G is our innovation, as it is the further development of the successful ER22G series. This new product range operates synchronous and asynchronous motors. Below you can configure your ER24G according to your individual ideas and request a corresponding offer directly from us!

Frequently asked questions

to the ER24 G frequency converter

How do I start the ER24G?

All page numbers refer to the ER24 Programming Guide.

Switch on the power supply of the inverter without giving a run command (start command +24V and DI1). Observe connection diagram!

Set the following settings:

Set the rated frequency of the motor [Standard Motor Freq.] (bFr), page 84, if the frequency is not 50 Hz.
Only set the motor parameters in the [DRIVE DATA] menu (drC-), page 103, if the factory configuration of the drive is unsuitable.
Set the application functions in the [INPUTS / OUTPUTS CFG] menu (I_O-), page 124, in the [CONTROL] menu (CtL-), page 153, and the [APPLICATION FUNCTIONS] menu (FUn-) menu, page 167, only if the factory configuration of the drive is unsuitable.

Set the following parameters in the [SETTINGS (SEt-)] menu:

[Acceleration time] (ACC), page 85, and [Deceleration time] (dEC), page 85.
[Low frequency] (LSP), page 85, and
[High Sensitivity] (HSP), page 87.
[Therm. rated current] (ItH), page 85.

4. Once all preparations have been completed, the drive command/start command can be wired.
(FU starts and drives off!)

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 is a BLEMO frequency inverter set up in the TIA Portal when controlled via a Siemens PLC?

A BLEMO frequency converter can be controlled using a Siemens PLC via Profinet or Profibus-DP.
This requires an additional communication card, which can be found in the frequency converter catalog.
Please note that not all frequency converters support this bus communication.
Connection to Profibus-DP or Profinet is possible with the ER24 and ER41.

Minimum settings for bus operation (direct control of the QW addresses of the ER24 / ER41):

First, the slave ER24 / ER41 xyz is set up in the TIA Portal. Please install the GSD or GSDxml device file beforehand
Then, a telegram type is selected in the HW configuration of the ER24 / ER41 and moved to the I/O field.
In this example, we use telegram 102, which consists of 6 PZDs.
PZD stands for “process cyclic data.” The PZDs are the data that are to be exchanged cyclically.
These include status words, target speeds, etc. (see image “EA assignment PZDs”).

The following four channels are already preset and do not need to be changed. The result in operation can be seen in the “Observation table” image.

The first reserved QW of the PZD address must be used to send the control word
(according to Drivecom standard: 16#0006, Stop 16#0007, Motor run 16#000F)
The second double word sends the target speed (rpm).
The first IW is read out to read the status word of the ER24 / ER41 frequency converter.
The second double word is read out to read the current actual speed (rpm).
The words should then be declared as variables (see image “Variable declaration”).
The setpoint source field bus must be set in the frequency converter (see figure “Settings ER24 / ER41 Setpoint source bus”).
The addressing of the ER24 / ER41 must also be set in the bus. Of course, this differs depending on the bus type.
- For Profibus-DP, the address is set to 1-126 (see image “Settings Profibus Addressing ER24 / ER41”).
- For Profinet, address assignment via PLC: DCP or address setting in the ER24 / ER41 menu: fixed IP (see image “Profinet settings”)

Is it possible to operate a motor with low power on a frequency inverter with higher power?

In principle, it is possible to operate a low-power motor on a higher-power frequency converter. The ratio between motor and inverter power is important here. Experience shows that the ratio of 1:4 should not be exceeded.

For example, it is not recommended to operate a 0.75 kW motor with a 30 kW BLEMO frequency converter.
This combination can be used for testing purposes, but the motor phase monitoring must be deactivated.

How can a parameter set be loaded from the graphic display to the inverter on the ER24 ?

Connect the graphic display to the Modbus interface
(RJ45 connector) on the ER24 frequency converter via a Modbus cable.
Connect the mains voltage.
Press “ESC” repeatedly until the main menu appears.
Select item “4 Open / Save as” and press “OK”.
Select item “4.1 Copy to inverter” and press “OK”.
Select the desired data set (e.g. “File 1”) and press “OK”.
The submenu “Download group” appears. Now select “All” and press “OK”.
The display shows: “Check the connection to the inverter” “ESC = Abbr. OK=Take over”, Now press “OK”.
After successful saving, the display shows: “Transfer complete” “OK OR ESC TO CONTINUE”
Now press “ESC” or “OK.”
Press “ESC” several times to return to the starting point (e.g. “Main menu”).

How can the +/- speed be set on the ER24 frequency inverter ?

Assuming that the ER24 is in its factory settings, the following settings must be carried out in the stopped state (display: rdY):

Press ENT and select COnF mode, then press ENT again.
First select the “FULL” option, scroll down to the LAC parameter and set it to AdV or EPr, press >2s ENT to save, then press ESC until LAC reappears on the display.
Scroll to the CtL control menu, press ENT, locate parameter FR2, and set it to UPdt.
In the CtL control menu, set the rFC parameter to FR2.
Open the Application Functions menu and select the UPd parameter.
Now call up the “USP” parameter and select a free input for the “+ speed” assignment, e.g. LI5
Finally, call up the “dSP” parameter and select a free input for the “- Speed” assignment, e.g. LI6.
The speed is increased via input DI5 and reduced via input DI6.

How do I reset the ER24 to factory settings?

Call up parameter FrY[PARAMETER GROUP] and select ALL, save with ENT, and
then exit the parameter with ESC.
Call up parameter GFS [GOTO FACTORY SETTINGS] and select YES, then press and hold the ENT key for at least 2 seconds to save.

How are the switching steps programmed on the ER24-...G-V7?

Please download the file ER24-…G-V7 5-step switch.

Downloads ER24 G

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 converterER24G

ER24 G – the universal drive

for all applications with synchronous motors and asynchronous motors.

Product variations

The advantages

Frequency inverter ER24 G

Areas of application

Product information

product inquiry

Frequently asked questions

to the ER24 G frequency converter

Downloads ER24 G

Customers also bought

Our service world

The focus is always on people. Not machines.

The focus is always on people. Not machines.

Frequency converter
ER24G