Frequency inverter with IP65/66 protection for speed adjustment
of synchronous and asynchronous motors, 0.18 to 7.5 kW, -200 to 500 V, 1~ and 3~.
ER24G – V7 IP65 – 5 tap changer
The ER24G is the further development of the successful ER22G series. This new product range operates synchronous and asynchronous motors.
With its outstanding functionality, the ER24G can be used for all tasks in mechanical and plant engineering. 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. Programmable function blocks allow the execution of e.g. Boolean and arithmetic functions, timers, counters, comparators and short automation sequences.
The protection class has been increased to IP66 for version 1 (V1) and to IP65 for version 2 (V2) with integrated switches.
STO: Safe Torque Off
Free run-out to standstill due to motor torque separation.
SLS: Safely reduced speed
Deceleration, maintenance of 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 gates
Safe control of safety gates with delay of safe exit.
Safety Integrity Level (SIL 1, 2 or 3) according to
IEC 61508 (Parts 1 and 2)
Performance Level (PL e) according to
ISO 13849-1/-2 Category 3
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.
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 following parameters in the [SETTINGS (SEt-)] menu:
After all preparations have been completed, the run command / start command can be wired. (FU starts and drives off!)
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.
In principle, it is possible to operate a motor with low power on a frequency inverter with higher power.
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 0.75kW motor with a 30kW BLEMO frequency inverter.
This combination can be used for test purposes, but the motor phase monitoring must be deactivated.
Assuming that the ER24 is in the factory default setting, the following are available in stopped mode
state (display: rdY), the following settings must be made:
Press ENT and select the COnF mode, then press ENT again.
2. first select the item “FULL”, scroll down to the parameter LAC and select this parameter.
to AdV or EPr, >press ENT for 2s to save, then press ESC,
until LAC appears in the display again.
Scroll to the Control CtL- menu, press ENT, locate the FR2 parameter andpress
4. set parameter rFC to FR2 in menu Control CtL-.
Call up the Application functions FUn- menu and select the UPd- parameter there.
Now call up the parameter “USP” and enter a value for the assignment “+ speed”.
Select free input e.g. LI5
Finally, call up the “dSP” parameter and select a free parameter for the “- speed” assignment.
Select input e.g. LI6
Via input DI5 the speed is increased and via input DI6 the speed is reduced.
1. parameter FrY[PARAMETER GRUPPE] Call up and select ALL [Alle], save with ENT, and
then exit the parameter with ESC.
2. call up parameter GFS [GOTO WERKSEINST] and select YES [Ja], then press ENT at least
Press and hold for 2 seconds to save.
Please download the file ER24-…G-V7 5-step switch.