Siemens Sinamics S120 Manual page 256

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Table of Contents

Line Modules Booksize

4.7 Basic Line Modules with cold plate

Terminals X21.1 and X21.2

Risk of the resistor overheating if the temperature switch is not connected

If the temperature switch is not connected, this can cause the resistor to overheat.

• Connect the temperature switch.

Terminals X21.3 and X21.4

Danger to life when live parts are touched when terminals X21.3 and X21.4 are connected

For operation, the 24 V DC voltage must be connected to terminal X21.3 and ground to

terminal X21.4.

Pulse cancellation is activated if the power supply is disconnected. Regenerative feedback

is deactivated and the bypass relay drops out. If the Line Module is not disconnected from

the line supply when the EP terminal is de-energized, for example, because a line contactor

is not installed, then the DC link remains charged.

Death or serious injury can result when live parts are touched.

• Neutralize the voltage in the DC link.

Danger to life due to electric shock in the event of voltage flashovers at the temperature

Voltage flashovers in the signal electronics can occur in motors without safe electrical

separation of the temperature sensors.

• Use temperature sensors that fully comply with the specifications of the safety isolation.

• If safe electrical separation cannot be guaranteed (for linear motors or third-party

motors, for example), use a Sensor Module External (SME120 or SME125) or Terminal

Module TM120.

Booksize Power Units

Manual, (GH2), 04/2014, 6SL3097-4AC00-0BP6