Central Processing Unit
5–16
1070 072 145-102 (01.07) GB
Specifications Analog inputs
Analog inputs,
as per EN 61131-2
4 power inputs
Input voltage range D 0 to 10 V, unipolar
D Selectable between 2 and 10 V
Input resistance 20 kW
Protective circuit RC circuit, Schottky diodes
Max. permissible continuous overload Reverse polarity up to supply voltage
Isolation potential No isolation
Input filter characteristic 1st order
Conversion time Cycle time plus 10 ms
Sampling interval 20 ms
Scanning repeat time 10 ms
Operating mode Time controlled in 10 ms intervals
Conversion mode Gradual approximation
Digital display 16 bit, straight binary
Resolution 10 bit
Value of LSB w/o standardization:
10 V : 2
10
= 9.8 mV
w/ standardization
8 V : 2
10
= 7.8 mV
Temperature coefficient 1%, 5 to 55_C
Max. short–term deviation during
pulse shaped interferences
v2 %
Cable length max. 100 m, screened
The data related to the analog inputs are stored in the system area, S64
through S71. With standardization enabled, the analog inputs are monitored
for cable breaks. Cable breaks are reported in system area S80.
System area Analog inputs
S64 / S65 Channel 0
S66 / S67 Channel 1
S68 / S69 Channel 2
S70 / S71 Channel 3
S80 Cable break messages
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