Earth-Leakage Circuit Breaker; Control Circuits For The Mains Connection; Overview - REXROTH EcoDrive Cs Project Planning Manual

6-18
Mains and Supply Voltage Connection
6.8

Earth-leakage Circuit Breaker

6.9

Control Circuits for the Mains Connection

Overview

Signal contact ready-to-operate
It is not possible to use a earth-leakage circuit breaker in Rexroth
EcoDrive Cs drive controllers (EN 50178/1994, section: 5.3.2.3).
Protection against indirect contact is implemented by the protective
grounded housing of the components of the drive system.
The control circuits recommended by Rexroth specify the functional
principle.
Note: The choice of control and its effects depends on the extent of
the functions and the operating sequence of facility or
machine. It is therefore the responsibility of the manufacturer
of the installation and machine.
The ready to operate message is output via a relay contact (N/O). If the
Bb contact closes, then the drive is ready to receive power. The contact is
Bb
thus a precondition for connecting the mains contactor.
Danger of damage!
⇒ The effectiveness of the separation of, the mains
connection via signal contact "Ready to operate Bb" or
the multi-circuits of all Rexroth EcoDrive Cs Bb
CAUTION
contacts must be ensured!
⇒ See also Functional Description of firmware: "Power shutdown with
fault"
Note: When the mains contactor is shut off the mains coil causes
overvoltages. These can cause the Bb contact to drop
prematurely. To attenuate overvoltage use overvoltage limiters
with diode combinations.
Fig. 6-20: Recommended protective circuits
Rexroth EcoDrive Cs Drives
DC 24V
K1
DOK-ECODR3-DKC**.3-CS*-PR02-EN-P
AP5123F1.FH7