3. AIAO Units
MN05003006E F or more information visit:
w w w. e a t o n . c o m
1-29
Current output mode:
20mA
+4, 000
0
OFFSET
4mA
GAIN
+2, 000
12mA
10mA
Current
out put
Mode 2
Mode 3
Digita input
l
Mode 2 of CR#1:
GAIN = 12mA (2,400LSB ), OFFSET=4mA (800LSB).
Mode 3 of CR#1:
GAIN = 10mA (2,000LSB), OFFSET=0mA (0LSB).
GAIN:
Set range of current output when digital input value is K2,000
should be -8mA~+40mA (-1,600LSB ~+8,000LSB).
OFFSET:
Set range of current output when digital input value is K0 should
be -10mA ~+10mA (-2,000LSB ~+2,000LSB).
GAIN
－
OFFSET:
Range: +2mA~+30mA (+400LSB ~+6,000LSB).
Above is a D/A conversion characteristic curve of the voltage output mode and current
output mode. Users can adjust the conversion characteristic curve by changing the
OFFSET values (CR#18~CR#23) and GAIN values (CR#24~CR#29) based on the
application.
LSB(Least Significant Bit):
1. Voltage output: 1LSB=10V/4,000=2.5mV
2. Current output: 1LSB=20mA/4,000=5
Μ
a
Adjusting D/A Conversion Curve (Gain and Offset) in Voltage Output Mode
1. Description
y
ELC-AN04NANN example. When CR#1 is set for voltage output mode (mode 0), the
OFFSET value will be set to 0V (K0) and GAIN value to 5V (K2,000), i.e. output
voltage 0 ~ 10V will correspond to values 0 ~ +4,000.
y
When CR#1 is set to voltage output mode (mode 1), the OFFSET value will be set to
2V (K800) and the GAIN value to 6V (K2,400), i.e. output voltage 2V ~ +10V will
correspond to values 0 ~ +4,000.
y
If you cannot use the default voltage output mode (mode 0 and mode 1), you can
make adjustments to the D/A conversion curve according to the application
requirements. For example, Set the OFFSET of CH1 ~ CH4 to 0V (K0) and GAIN to
2.5V (K1,000).
y
You only need to set up the D/A conversion curve once.
