AEG SB4 series User Manual download pdf (Page 134)

Earthing and EMC-Measures

The 0V and M2 potantials are galvanically isolated in the DNP power supplies. The M1

and M4 are also isolated by optical couplers or relays.

All the circuits of the A500 can be operated as potential-free, i.e., without a connection

with the functional earth, if the protective circuit measures in section 5.4.2 are ob-

served.

However, a non-isolation is to be created according to the following diagram in order to

achieve a high EMC immunity:

Galvanic Connection of 0V and Earth Grounding in the Primary Subrack

Check the factory presetting: 4 Z screws tightened, Z jumper in the DTA 101 on the

depot slot (right).

The capacitive connection between the subrack earth ground and the 0V of the con-

trollers has a galvanic short-circuit with 4 Z screws. The opened Z jumper (DTA 101

only) activates the capacitive connection between the subrack earth ground and the

0 V of the I/O section. There is the possibility to close the Z jumper depending on the

application (see Fig. Figure 57).

(MA) Subrack earth ground

(0V) Reference conductor system of the internal electronics

0V (Controller)

Z screw (4x) Z jumper

0V (I/O modules)

DTA 101

Figure 57 Diagram of the connection of 0V and MA

Capacitive Connection of 0V and Earth G rounding in the Secondary Subrack

Check the factory presetting: Z jumper on depot slot (right).

There is the possibility to close the Z jumper (compact structure, short line lengths)

depending on the application.

Connection of M1 and M2 with the Functional Earth. This connection point prefer-

ably lies on the relevant power supply (mutual supply of modules and sensors, see

section 3.2.2).

Connection of M4 with the Functional Earth. The connection point preferably lies

on the power supply for the working voltage. It is recommended to provide isolated

power supplies

for the supply of the actuators and

for the supply of the modules and sensors

(see section 3.2.3).

1 2 ... 129 130 131 132 133 134 135 136 137 138 139 ... 430 431

No comments

AEG SB4 series User Manual Page 134