General information
Direct parallel connection of open/close drives is usually not permissible due to undesirable reverse voltages. Mutual electrical decoupling of the motors is therefore necessary to enable parallel configurations.
The motor group relays in the MGR series are specifically designed for this electrical decoupling of motors in parallel configurations. The MGR 4 allows four motors to be operated simultaneously with a minimum of wiring effort. Furthermore, several MGR relays can be connected in parallel if it is necessary to operate significantly more drives in parallel.
Thanks to the very compact package and easy wiring, even relatively large motor groups can be installed very easily, neatly and economically.
In addition, interlocking of the run direction ensures that the connected motors cannot be switched to run in both directions at the same time.

Application
Electrically correct and therefore reliable parallel connection of open/close drives (230V AC).

Operation
The control device is connected to the control inputs B1 (Open) and B2 (Close). The control signals may come from a simple Open/Close switch or from the outputs of an electronic controller, such as the Schalk Universal Motor Controller UMS 5 or UMS U5.
Up to four drives can be connected to the MGR 4 motor outputs M1 to M4.
If it is necessary to operate more than four drives in parallel, the control inputs of several MGR relays can easily be connected in parallel.
In addition, interlocking of the run direction ensures that even with control devices that are not inherently safe (such as simple series switches) the motors cannot be switched to run in both directions at the same time.