GE VersaMax IC200MDL240 - Page 416

11-56 VersaMax Modules, Power Supplies and Carriers User's Manual GFK-1504N
11
IC200ALG331
Analog Output Module, 16 Bit Voltage/Current, 1500 V AC Isolation, 4 Channels
Scaling Example
A channel is configured in the 0 to 10 volts DC range. It measures a velocity
output. Electronic sensors and mechanical linkage external to the module have
determined that an output 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 a signal of 5 V DC corresponds to a speed of 73.3 ft/sec.
+10.0
+5.0
+9.0
Velocity
Output
Voltage
200
100
50
150
-50
-20
-60
(+1.5V, -20 ft/sec)
(+9.0V, +180 ft/sec)
For engineering units of feet per second, the following scaling values are used:
Low engineering units = –20 ft/sec
High engineering units = +180 ft/sec
Low span units = 1500 millivolts
High span units = 9000 millivolts
An output 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:
Low engineering units = –2000 hundredths ft/sec
High engineering units = +1800 hundredths ft/sec
Low span units = 1500 millivolts
High span units = 9000 millivolts
An output value of 5.0 V would be scaled to an engineering value of +7333
(hundredths of ft/sec).