GE VersaMax IC200PWR001 User Manual page 331

10
IC200ALG240
Analog Input Module, 16 Bit Voltage/Current, 1500 V AC Isolation, 8 Channels
Scaling Example
A channel is configured in the 0 to 10 V DC range. It measures a velocity input.
Electronic sensors and mechanical linkage external to the module have
determined that an input level of +1.5 V DC is equal to –20 ft/sec (–6 m/sec),
and that +9 V DC is equal to +180 ft/sec (+50 m/sec). Plotting these values on
a graph illustrates that a signal of 5 V DC corresponds to a speed of 73.3 ft/sec.
For engineering units of feet per second, the following scaling values are used:
An input value of 5.0 V would be scaled to an engineering value of +00073
(ft/sec).
In this example, scaling to hundredths of feet per second would provide better
resolution. The following scaling values would be used:
An input value of 5.0 V would be scaled to an engineering value of +7333
(hundredths of ft/sec).
10-16 VersaMax Modules, Power Supplies and Carriers User's Manual
Velocity
200
150
100
50
-20
+5.0
(+1.5V, -20 ft/sec)
-50
-60
Low engineering units
High engineering units =
Low span units
High span units
Low engineering units
High engineering units =
Low span units
High span units
(+9.0V, +180 ft/sec)
+9.0 +10.0
= –20 ft/sec
+180 ft/sec
= 1500 millivolts
= 9000 millivolts
= –2000 hundredths ft/sec
+1800 hundredths ft/sec
= 1500 millivolts
= 9000 millivolts
Input
Voltage
GFK-1504N