Allen-Bradley 1794-IT8 - Range Selection; Input Scaling

4–2 Writing Configuration to and Reading Status from your Module with a Remote I/O Adapter
Publication 1794-6.5.7 – April 1997
Individual input channels are configurable to operate with the
following sensor types:
Sensor Type Range
Voltage Millivolt –76.50 to +76.50mV
Thermocouple
Type B 300 to 1800
o
C
r ocoupl
Type E –230 to 1000
o
C
Type J –195 to 1200
o
C
Type K –230 to 1372
o
C
Type R –50 to 1768
o
C
Type S –50 to 1768
o
C
Type T –195 to 400
o
C
Type N –270 to 1300
o
C
Type C 0 to 2315
o
C
Type L –175 to 800
o
C
You select individual channel ranges using write words 1 and 2 of
the block transfer write instruction.
Scaling lets you report each channel in actual engineering units.
Scaled values are in integer format.
Input Type Range Scaling Maximum Resolution
Millivolt –76.50 to +76.50mV –7650 to +7650
10µV
Type B 300 to 1800
o
C 3000 to 18000 0.1
o
C
Type E –230 to 1000
o
C –2300 to 10000 0.1
o
C
Type J –195 to 1200
o
C –1950 to 12000 0.1
o
C
Type K –230 to 1372
o
C –2300 to 13720 0.1
o
C
Type R –50 to 1768
o
C –500 to 17680 0.1
o
C
Type S –50 to 1768
o
C –500 to 17680 0.1
o
C
Type T –195 to 400
o
C –1950 to 4000 0.1
o
C
Type N –270 to 1300
o
C –2700 to 13000 0.1
o
C
Type C 0 to 2315
o
C 0 to 23150 0.1
o
C
Type L –175 to 800
o
C –1750 to 8000 0.1
o
C
Type B 572 to 3272
o
F 5720 to 32720 0.1
o
F
Type E –382 to 1832
o
F –3820 to 18320 0.1
o
F
Type J –319 to 2192
o
F –3190 to 21920 0.1
o
F
Type K –382 to 2502
o
F –3820 to 25020 0.1
o
F
Type R –58 to 3214
o
F –580 to 32140 0.1
o
F
Type S –58 to 3214
o
F –580 to 32140 0.1
o
F
Type T –319 to 752
o
F –3190 to 7520 0.1
o
F
Type N –450 to 2372
o
F –4500 to 23720 0.1
o
F
Type C 32 to 4199
o
F 320 to 41990 0.1
o
F
Type L –283 to 1472
o
F –2830 to 14720 0.1
o
F
Note: In thermocouple mode, scaled number has an implied decimal point 1 digit from the right. For example, if reading is
18000, temperature is 1800.0. In millivolt mode, the implied decimal point is to the left of the last 2 digits. For example, if
reading is 2250, actual reading is 22.50mV
Range Selection
Input Scaling