Connecting Voltage Measurement Equipment - Siemens SINAMICS DCM Operating Instructions Manual

Notes
● External firing pulse amplifiers usually have integrated pull-up resistors at their inputs. If
this is not the case or interference immunity needs to be increased, additional pull up
resistors can be connected. However, the power pulse current must not exceed 1 A for
each output.
● Where several firing pulse amplifiers with their own power supply are connected in
parallel on the input side (e.g. SITOR sets), the inputs will need to be decoupled by
isolation diodes. This is already the case with SITOR sets.
Note
Restriction in conjunction with functional safety
In conjunction with the use of functional safety, it is not permissible that external firing pulse
amplifiers are used.
6.8

Connecting voltage measurement equipment

The following potentials from the power unit need to be connected to the "Voltage
measurement" module:
● Line supply voltage 1U1, 1V1, and 1W1
● Output voltage 1C1 and 1D1
The mounting tabs are arranged in groups for the different line voltage ranges.
Table 6- 6
Rated line voltage
< 6 V
6 V - 50 V
51 V - 125 V
126 V - 250 V
251 V - 575 V
576 V - 1000 V
Index [0] for line voltage, index [1] for armature voltage
1)
Other parameters:
p50078[0]
p51820
The voltage level selected must be the same on the printed circuit board and in the firmware
or the voltages measured will be highly inaccurate.
Voltage measurement equipment does not generate any ground leakage current.
SINAMICS DCM Control Module
Operating Instructions, 12/2018, A5E34888669A
Connecting voltage measurement equipment, parameter settings
Actual rated input voltage, armature
Suitable rated supply voltage (rms value) for the power unit (thyristors' proof
voltage)
6.8 Connecting voltage measurement equipment
Plug in at
5.6 V
50 V
125 V
250 V
575 V
1000 V
Connecting
Parameter
1)
p51821 = 6
p51821 = 50
p51821 = 125
p51821 = 250
p51821 = 575
p51821 = 1,000
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