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Analog Input Units Section 5-4
Display Area
Status Check Boxes
■ All Analog I/O Unit Models
■ GRT1-AD2
Error History Window For details on the Error History Window, refer to 4-5-1 Checking Maintenance
Information.
5-4 Analog Input Units
5-4-1 GRT1-AD2 Analog Input Units
General Specifications
Item Description
I/O Comment Displays up to 32 characters of text as a comment. A separate
comment can be set for each input.
Last Maintenance
Date
Displays the last maintenance date and time. (All models.)
Present Value Displays the present analog value. (All models.)
Displays data derived from the analog value, including the
Peak Value, Bottom Value, Top Value, Valley Value, Rate of
Change, Cumulated Count, Maximum Value, and Minimum
Value.
For details, refer to the descriptions of individual functions and
setting methods.
Item Description
Threshold Cumula-
tive Counter Over
On when the cumulative counter value exceeds the set value.
Cumulative Counter
Overflow
ON when there is an overflow in the cumulative counter value.
Cumulative Counter
Underflow
ON when there is an underflow in the cumulative counter
value.
Item Description
Over Range/Under
Range
ON when the analog data is above or below the displayable
range.
Alarm Over/Warning
Over
ON when the analog data is above or below the monitoring set
values set in the comparator function.
Broken wire ON when a wire is broken or disconnected. (Used only for
Analog Input Units when the input range is 1 to 5 V or 4 to
20 mA.)
Item Specifications
Unit power supply voltage 24 VDC (24 VDC –15% to +10%)
I/O power supply voltage I/O power supply not required.
Noise immunity Conforms to IEC 61000-4-4. 2.0 kV (power lines)
Vibration resistance
10 to 60 Hz, 0.7-mm double amplitude, 60 to 150 Hz, 50 m/s
2
Shock resistance
150 m/s
2
Dielectric strength 500 VAC for 1 min. with 1-mA sensing current (between isolated circuits)
Ambient temperature –10 to 55°C (with no icing or condensation)
Ambient humidity 25% to 85%
Operating environment No corrosive gases
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