X521 Three-Phase Voltage Sensing Up To 100 V 3-Ph. Ac - Siemens SINAMICS Equipment Manual

Electric shock due to voltage flashovers on the temperature sensor cable
Voltage flashovers in the signal electronics can occur in motors without safe electrical
separation of the temperature sensors.
● Only use temperature sensors that fully comply with the specifications of the safety
● If safe electrical separation cannot be guaranteed (e.g. for linear motors or third-party
6.2.4

X521 three-phase voltage sensing up to 100 V 3-ph. AC

Table 6-4
Type: Screw terminal 1
NOTICE
Damage to the VSM10 as a result of an impermissible terminal assignment
The VSM10 has two terminal strips, X521 and X522, to sense the three-phase line supply
voltage. A terminal assignment which is not permissible results in the module being damaged.
● Use just one of the two terminal strips.
● Only connect voltages to terminal strip X521 up to a maximum 100 V (phase-to-phase) via
● Only connect voltages to terminal strip X522 up to a maximum 690 V (phase-to-phase)
Supplementary component descriptions
Manual, 06/2019
WARNING
isolation.
motors), use a Sensor Module External SME120 or SME125 or the TM120 Terminal
Module.
X521: Voltage sensing 100 V
Terminal
1
2
3
a transformer.
directly.
Designation
Phase voltage U
Phase voltage V
Phase voltage W
Voltage Sensing Module VSM10
6.2 Interface description
Technical data
Connection to the voltage sensing for medi‐
um-voltage networks via a safe electrically
isolated transformer
Resistance to neutral point: ∼500 kΩ
Insulation resistance, neutral point - ground
when the jumper is not inserted: >10 MΩ
83