11/03 Electrical Installation
SINAMICS G150
Operating Manual
4-21
NOTE
The diagram of the customer terminal block shows the factory setting. The digital
inputs (terminals -X520 and -X530) in the example are powered by the internal 24
V supply of the customer terminal block (terminal -X540).
The two groups of digital inputs (optocoupler inputs) have a common reference
potential (ground reference M1 or M2). In order to close the circuit when the
internal 24 V supply is used, the ground references M1 / M2 must be connected to
internal ground (M).
If power is not supplied from the internal 24 V supply (terminal -X540), the jumper
between ground M1 and M or M2 and M must be removed in order to avoid
potential rounding.
X520: 4 Digital Inputs
Table 4-8 Terminal block X520
Terminal Designation
1)
Technical data Factory Setting
1 DI 0 ON / OFF1
2 DI 1 Motor pot. higher
3 DI 2 Motor pot. lower
4 DI 3 Acknowledge error
5 M1
1 2 3 4 5 6
6 M
Voltage: -3 V to 30 V
Current input (typical):
10 mA at 24 V
With electrical isolation:
Reference potential is terminal
M1
Level:
High level: 15 V to 30 V
Low level: -3 V to 5 V
1)
DI: digital input; M1: ground reference; M: electronic ground
Max. connectable cross-section: 1.5 mm² (AWG 14)
NOTE
An open-circuit input is interpreted as “low“.
Terminal M1 must be connected so that the digital inputs can function correctly.
The following solutions are possible:
1) The provided ground reference of the digital inputs, or
2) A jumper to terminal M (Important: electrical isolation for the digital inputs is
revoked as a result).
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