SATEC SA300 ezPAC Operation Manual - Manual (Page 73)

Chapter 7 Programming the SA300 Programming Analog Inputs
SA300 Substation Automation Unit 73
Programming Analog Inputs
The SA300 can be equipped with up to four plug-in 4-channel Analog Input/Output
(AI/AO) modules, or with two 8-channel AI modules, with a total of 16 analog inputs.
I/O numbers are automatically assigned to the analog inputs in the order of
connection when the device is powered up.
The SA300 automatically converts the AI readings received from the analog-to-digital
converter to the user-defined engineering scale and shows the input values in true
engineering units, for example, in volts, amps, or degrees, with the desired resolution.
To configure the analog inputs in your device, select General Setup from the Meter
Setup menu, and then click on the Analog Inputs tab. If you are programming your
device online, Analog inputs that are not present in the device are designated as not
available.
The available AI options are listed in the following table:
Option Range Description
AI type 0-1 mA
±1 mA
0-20 mA
4-20 mA
0-50 mA
±10 V The AI module type. When connected to the device,
shows the actual AI type read from the AI module.
Zero scale Defines the low engineering scale (in primary units) for
the analog input corresponding to a lowest (zero) input
current (0 or 4 mA, or 0 V)
Full scale Defines the high engineering scale (in primary units) for
the analog input corresponding to a highest input
current (1, 20 or 50 mA, or 10 V)
Dec. Places The number of decimal digits in a fractional part of the
scaled engineering value
Value label An arbitrary name you can give the analog input value