174 • I/O modules
Analog Inputs 750-461, (-481)
Modular I/O System
ETHERNET TCP/IP
Operating mode:
Operating mode:
Item-No.:
Evaluation of resistance sensor type PT 100
750-461
Resistance test: 10
Ω
to 1.2 k
Ω
750-461/000-002
Evaluation of resistance sensor type PT 1000
750-461/000-003
Evaluation of resistance sensor type NI 100
750-461/000-004
Evaluation of resistance sensor type NI 1000
750-461/000-005
Resistance test: 10
Ω
to 5 k
Ω
750-461/000-007
Evaluation of resistance sensor type PT 100 (Siemens)
750-461/000-200
Numerical format
All temperature values will be shown in a unit numerical format. If the mode
‘DEFAULT’ is selected each bit corresponds to 0.1°C. The possible numerical
range refers to the standardized temperature range of the used sensors. The
following table will explain the numerical format on a preset PT100. In the
third column the numerical format for PT1000 (750-461/000-003) is ex-
plained.
750-461, /000-003
Temp.
°C
Resistance
(
Ω
)
PT 100
Resistance
(
Ω
)
PT 1000
Value
Binary
Hex.
Dec.*)
850
390.481
3904.81
0010 0001 0011 0100
2134
8500
100
138.506
1385.06
0000 0011 1110 1000
03E8
1000
25.5
109.929
1099.29
0000 0000 1111 1111
00FF
255
0.1
100.039
1000.39
0000 0000 0000 0001
0001
1
0
100
1000
0000 0000 0000 0000
0000
0
-0.1
99.970
999.70
1111 1111 1111 1111
FFFF
-1
-25.5
90.389
903.89
1111 1111 0000 0001
FF01
-255
-200
18.192
181.92
1111 1000 0011 0000
F830
-2000
<18
<180
1000 0000 0000 0001
8001
-32767
*
)
Temperature values under 0°C are represented as binary value in the two's
complement.