Galil Motion Control RIO-47120, Руководство пользователя

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Specifications
Number of Inputs 6 RTD inputs
RTD input – Analog Input Map RTD[0:5] = AI[0:5]
Output Range 0-5V
Excitation Current 1 mA
Input Range 18 – 230
Ω
1
Temperature Range (100
Ω
RTD) -200 to 350 deg C
1
1 If greater than 230
Ω
(350 deg C) is required, contact Galil.
Wiring
The SBC-48206 has qty 6, 3-wire RTD inputs. The RTD is wired directly to the screw terminals as indicated
in
Figure 13
below.
Figure 13: RTD wiring to SBC-48206
Operation
The SBC-48206 will send a 0-5V analog voltage to the RIO that is related to the resistance of the RTD.
When using the SBC-48026, the analog inputs should be set to 0-5V inputs for the 6 RTD inputs. This is
done with the AQ command with a setting of 3 (AQ n,3 – where n = 0-5).
The calculation for the resistance of the RTD from the analog voltage is given from the following equation.
R = (1000*V)/21
Where R = Resistance of RTD
V = Analog Read from RIO
There are 2 methods for calculating the temperature once the resistance of the RTD has been calculated.
Note:
The following calculations assume an RTD with R
0
= 100
Ω
and
α
= 0.00385 (Platinum RTD).
94 A1 – SCB-48206 RIO-47xxx