Pt100 Evaluation Unit (Option L86) - Siemens SINAMICS G150 Operating Instructions Manual

4.10.13

PT100 evaluation unit (option L86)

Description
Note
Additional operating instructions
The PT100 evaluation unit and the parameters for the measurement channels are described
in the "Additional Operating Instructions".
The PT100 evaluation unit can monitor up to six sensors. The sensors can be connected in a
two or three-wire system. With the two-wire system, inputs xT1 and xT3 must be assigned.
With the three-wire system, input xT2 must also be connected to -B140, -B141 (x = 1, 2, 3).
The limit values can be freely programmed for each channel. Shielded signal cables are
recommended. If this is not possible, the sensor cables should have at least have twisted-
pair wires.
In the delivery condition, the measurement channels are divided into two groups of 3
channels each. With motors, for example, this means that three PT100s in the stator
windings and two PT100s in the motor bearings can be monitored. Unused channels can be
suppressed via parameters.
The output relays are integrated in the internal fault and alarm train of the cabinet unit. The
power for the PT100 evaluation unit is supplied and the evaluation itself executed within the
converter.
When the temperature set for "alarm" is exceeded, "external alarm 1" (A7850) is triggered.
When the temperature set for "fault" is exceeded, "external fault 1" (F7860) is triggered.
Connecting
Table 4- 42
Max. connectable cross-section: 2.5 mm²
Diagnostics
Messages output during operation and in the event of faults (meaning of LEDs on -B140,
-B141) are described in the Operating Instructions in the customer DVD supplied with the
device.
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A
Terminals -B140, -B141 – connection for PT100 evaluation unit
Terminal
-B140: 1T1-1T3
-B140: 2T1-2T3
-B140: 3T1-3T3
-B141: 1T1-1T3
-B141: 2T1-2T3
-B141: 3T1-3T3
Technical data
24 ... 240 V AC/DC; PT100; sensor 1; group 1
24 ... 240 V AC/DC; PT100; sensor 2; group 1
24 ... 240 V AC/DC; PT100; sensor 3; group 1
24 ... 240 V AC/DC; PT100; sensor 1; group 2
24 ... 240 V AC/DC; PT100; sensor 2; group 2
24 ... 240 V AC/DC; PT100; sensor 3; group 2
Electrical installation
4.10 Other connections
141