Siemens SINUMERIK 840D sl Manual page 133

Measurement using a 3-wire connection system
The following pins must be jumpered at connector X3 in order to perform the measurement in
the PT100 using a 3-wire connection system:
● Temperature measurement with channel 1:
● Temperature measurement with channel 2:
Analog outputs
The module has two analog outputs. These can optionally be assigned parameters as voltage
or current output.
Note
The analog outputs are only enabled following the parameter assignment.
From the switch-on of the I/O module to when it is enabled, the analog outputs do not read
0 V, but are defined by a voltage pulse at -0.2 V. This value must be taken into consideration
when specifying the setpoint value.
The cycle time of the analog value accumulation is limited by the PLC cycle.
Table 9-51
Parameter
Output range (rated value)
Permitted overrange
Resolution
Accuracy
Max. load current
Table 9-52
Parameter
Output range (rated value)
Permitted overrange
Resolution
Accuracy
Load impedance
NCU 7x0.3 PN, NCU 7x0.3B PN
Manual, 06/2014, 6FC5397-1EP40-5BA1
Short-circuit pin 2 (CI 1) and pin 4 (AI 1-) and connect the jumper at connector X3
Short-circuit pin 6 (CI 2) and pin 8 (AI 2-) and connect the jumper at connector X3.
Note
Measuring accuracy
The accuracy of the temperature input becomes poorer: The resistance of the connecting
cable of the jumpered connecting cable falsifies the measurement.
Technical specifications in the "voltage output" operating mode
Technical specifications in the "current output" operating mode
Connectable components
9.3 PP 72/48D 2/2A PN
Value
- 10 V to + 10 V
- 10.5 V to + 10.5 V
16 bits (including sign)
+/- 0,5 %
-3 mA to +3 mA
Value
- 20 mA to + 20 mA
- 20.2 mA to + 20.2 mA
16 bits (including sign)
+/- 0,5 %
≤ 600 ohm
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