X521 Three-Phase Voltage Sensing Up To 100 V 3-Ph. Ac - Siemens SINAMICS S120 Manual

Voltage Sensing Module VSM10
8.3 Interface description
Electric shock when the motor temperature sensor insulation fails
When connecting temperature sensors, which have no safe protective separation with respect
to the motor power circuit, then arcing to the signal electronics can occur.
• Use motors whose temperature sensors have safe electrical separation.
• Use only connecting cables and connectors with safe electrical separation between the
• If safe electrical separation cannot be guaranteed (for linear motors or third-party motors,
8.3.4

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

Table 8-4
Type: Screw terminal 1 (Page 321)
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)
218
WARNING
wires of the temperature sensor and the wires of the power circuit.
for example), use a Sensor Module External (SME120 or SME125) or Terminal Module
TM120.
X521: Voltage sensing 100 V
Terminal
1
2
3
a transformer.
directly.
Designation
Phase voltage U
Phase voltage V
Phase voltage W
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
Control Units and additional system components
Equipment Manual, 06/2020, 6SL3097-5AH00-0BP2