17
8.2.4 Computing equation by ratio and bias setting
Computing equation
O = RI + B
(Normal output)
O: Output (%)
O = S - (RI + B) (Reverse output)
R: Ratio setting (0.10 to 4.00 times)
I : Input (%)
B: Bias setting (-100 to 100%)
S: 100%
Input/Output diagram
Normal output
1
: R = 1.00 times
B = 50%
2
: R = 0.50 times
B = 50%
3
: R = 2.00 times
B = 0%
4
: R = 1.00 times
B = 0%
5
: R = 0.50 times
B = 0%
6
: R = 1.00 times
B = -50%
(Fig. 8.2.4-1)
Reverse output
1
: R = 1.00 times
B = 50%
2
: R = 0.50 times
B = 50%
3
: R = 2.00 times
B = 0%
4
: R = 1.00 times
B = 0%
5
: R = 0.50 times
B = 0%
6
: R = 1.00 times
B = -50%
(Fig. 8.2.4-2)
9. Specifications
Input specifications
SAAR (DC current ratio transmitter)
Input
Shunt resistor
4 to 20mA DC
0 to 20mA DC
0 to 16mA DC
50
2 to 10mA DC
0 to 10mA DC
100
1 to 5mA DC
200
0 to 1mA DC
1k
Connect a shunt resistor (sold separately) between input terminals.
See (Table 4.3.3-1) on page 8.
O
utp
ut
O
utp
ut
Input
Input
