Thermistor Motor Protection Unit (Option L83/L84); Pt100 Evaluation Unit (Option L86) - Siemens SINAMICS G150 Operating Manual

Electrical Installation
4.9.11

Thermistor Motor Protection Unit (Option L83/L84)

Description
This option includes the thermistor motor protection unit (with PTB approval) for
PTC thermistor sensors (PTC resistor type A) for warning and shutdown. The
power supply for the thermistor motor protection unit is provided inside the
converter where the evaluation is also performed.
Connection
Table 4-30
Equipment designation
The PTC thermistor sensors are connected directly to terminals T1 and T2 of the
evaluation unit.
Table 4-31
Line cross-section in mm²
Diagnostics
Messages output during operation and in the event of faults (meaning of LEDs) are
described in "Additional Operating Instructions" in the operating manual.
4.9.12

PT100 Evaluation Unit (Option L86)

Description
NOTE
The PT100 evaluation unit and the parameters for the measurement channels are
described in "Additional Operating Instructions".
The PT100 evaluation unit can monitor up to 6 sensors. The sensors can be
connected using a two-wire or three-wire system. With the two-wire system, inputs
Tx1 and Tx3 must be assigned. With the three-wire system, input Tx2 must also be
4-38
F127/F125 – connection for thermistor motor protection unit
F127 T1, T2
F125 T1, T2
Maximal line length for the sensor circuit
2.5
1.5
0.5
Function description
Thermistor motor protection (warning)
Thermistor motor protection (shutdown)
Line length in m
2 x 2800
2 x 1500
2 x 500
11/03
SINAMICS G150
Operating Manual