AMKASYN Digital inverters in modular construction
Power supply modules AN
4.1
- AZ page 14
9 Signal description of Power Supply modules
Terminals EH1, EH2, ES1, ES2
A relay contact in the central module AZ bridges terminals EH1 and EH2 on the plug-in
terminal block X05 and thus energizes the main contactor coil. Terminals ES1-ES2 are
connected in series to the contactor coil. The loop ES1-ES2 must be closed by the customer
by the contact of a safety time relay. The main contactor supply is interrupted on the
hardware side by separating the connection ES1-ES2.
The user thus has the possibility of isolating the drive system on the power side from the
power supply by an external safety circuit. The input of the switched mode power supply is
not interrupted in this case and axis-specific data is retained.
Input RF „Inverters On“ must be switched off before or simultaneously with the interruption of
ES1-ES2. The drive system goes to fault without this measure. It must be noted that
regenerative braking is possible only with the main contactor closed! If the safety regulations
require direct shutdown of the main contactor, an external braking resistor which converts
surplus braking energy into heat must be connected to the AZ module should the internal
braking resistor not be sufficient.
Terminals HK1, HK2 (from AN version 01.00)
Auxiliary contact (n.c.) of main contactor. External evaluation by the higher ranking controller.
