X20 system modules • Motor controllers • X20MM3332
1934
X20 system User's Manual 3.10
4.25.3.8 Function description - Motor operation
Three DC motors can be operated with the module. Each output is designed as a full-bridge output, therefore the
motors can be moved in both directions.
V
cc
GND
M
Low-side
High-side driver -
Low-side driver -
High-side
Description of the operating modes using the basic circuit diagram shown above:
Operating mode
Description
Rotational direction 1
If the high-side and the low-side are active, the direction of rotation on the motor is from + to -.
Rotational direction 2
If the high-side driver - and the low-side driver - are active, the direction of rotation on the motor is from - to +.
Brakes
If both low-side drivers are active, the motor is short-circuited. This functions as a motor brake.
4.25.3.9 Protection
The power supply line should be protected by a circuit breaker or a fuse. In general, dimensioning the supply line
and overcurrent protection depends on the structure of the power supply (modules can be connected individually
or in groups).
Information:
The effective current for the power supply depends on the load, but is always less than the sum of the
output currents. Make sure that the maximum nominal current of 31 A per pin is not exceeded on the
power supply terminals of the power unit.
When choosing a suitable fuse, the user must also account for characteristics such as aging effects, temperature
derating, overcurrent capacity and the definition of the rated current, which can vary by manufacturer and type. In
addition, the fuse that is selected must also be able to handle application-specific characteristics (e.g. overcurrent
that occurs in acceleration cycles).
The cross section of the power mains and the rated current of the overcurrent protection used are chosen according
to the current load so that the maximum current load for the cable cross section selected (based on the type of
layout, see table) is greater than or equal to the current load in the power mains. The rated current of the overcurrent
protection must be less than or equal to the maximum current load for the cable cross section selected (based
on the type of layout, see table):
I
Mains
≤
I
b
≤
I
Z
Mains
≤
Fuse
≤
Line/cable
Current load of the cable cross section I
Z
/ rated current of the over current protection I
b
[A] according to type
of installation in an ambient air temperature of 40°C in accordance to IEC 60204-1
Wire cross section [mm²]
B1
B2
C
E
1.5
13.5 / 13
13.1 / 10
15.2 / 13
16.1 / 16
2.5
18.3 / 16
16.5 / 16
21 / 20
22 / 20
4.0
24.0 / 24.0
23.0 / 20.0
28.0 / 25.0
30.0 / 25.0
6.0
32.0 / 32.0
29.0 / 25.0
36.0 / 32.0
37.0 / 32.0
Table 697: Cable cross section of the mains supply line depending on the type of layout
The tripping current of the fuse cannot exceed the rated current of fuse I
b
.
Type of layout
Description
B1
Wires in conduit or cable duct
B2
Cables in conduit or cable duct
C
Cables or wires on walls
E
Cables or wires on open cable tray
Table 698: Type of layout for the mains supply line
Summary of Contents for X20 System
Page 2: ......
