Siemens SIMATIC S5-115U, User Manual

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Analog Value Processing S5-115U Manual
10.3 460-7LA13 Analog Input Module
The 460-7LA13 analog input module has been developed from the 460-7LA12 analog input
module. It offers the following advantages:
• Lower power consumption and heating
• Lower weight
• New PT 100 climatic measurement range (-100 °C to +100 °C) with high resolution (1/40 °C)
All functions of the 460-7LA12 module are also available on the 460-7LA13 module.
The following features are identical with the 460-7LA12 module:
• Transducer cabling
• Use of the 6ES5 498 range cards
• Assignment of the front connector
• System behavior
Compared to the 460-7LA12 analog input module, the following features of the 460-7LA13
analog input module are new or different:
• New PT100 climatic measuring range (as alternative to the previous PT100 measuring range)
• Setting of the mode selector switches for the PT100 measuring ranges
• Setting of the mode selector switched for the measuring range 50 mV (e. g. for connection of
thermocouples).
New PT100 Climatic Measuring Range
The same measuring range as with the 460-7LA12 analog input module exists also on the
460-7LA13 analog input module; i.e. the PT100 temperature range (-200 °C to +850 °C) is resolved
in this measuring range to approximately 4000 units. This corresponds to a resolution of approx.
0.25 °C.
If the new PT100 climatic measuring range is selected via the mode selector switches, all eight
analog inputs can be used in this measuring range only.
Do not use other than the 6ES5 498-1AA11 (50 mV/0.5 V) range card.
The following must be observed in conjunction with wire break monitoring in the PT 100 climatic
measuring range:
If a line of the auxiliary circuit (IC+, IC-) is interrupted, the value "negative end value" is encoded
for all inputs and the overflow bit is set to "1". In the case of transducer or measuring line break,
the error bit for the corresponding channel is additionally set to "1".
For an exact representation of measured values in the PT100 climatic measuring range refer to
Table 10.23.
For setting of the "PT100" mode, the following markings are printed on the cover of the module:
Standard range: "resistance thermometer uncompensated full range"
Climatic measuring range: "resistance thermometer uncompensated low range"
10-16
EWA 4NEB 811 6130-02b