AutomationDirect DL205, Руководство пользователя

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DL205 Analog Manual, 7th Edition Rev. D
6-2
Chapter 6: F2-04RTD 4-Channel RTD Input
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D
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CH1+
CH2+
COM
CH3+
CH4+
CH1–
CH2–
COM
CH3–
CH4–
F2-04RTD
IN RTD
TEMP
RTD
INPUT
F2-04RTD
+ CH1+
+ CH2+
COM
+ CH3+
+ CH4+
CH1–
CH2–
COM
CH3–
CH4–
F2-04RTD
IN
RTD
INPUT
F2-04RTD
RTD
TEMP
Module Specifications
The F2-04RTD 4-Channel Resistive Temperature Detector
Input Module provides the following features and benefits:
• Provides four RTD input channels with 0.1 °F temperature
resolution.
• Automatically converts type Pt100 q , jPt100 q , Pt1000 q ,
Cu25 q , Cu10 q signals into direct temperature readings. No
extra scaling or complex conversion is required.
• Temperature data can be expressed in °F or °C, and as magnitude
plus sign or 2’s complement.
• Precision lead wire resistance compensation by dual matched
current sources and ratiometric measurements.
• The temperature calculation and linearization are based on data
provided by the National Institute of Standards and Technology
(NIST).
• Diagnostic features include detection of short circuits and input
power disconnection.
Module Calibration
The module automatically re-calibrates every five seconds to remove any offset and gain
errors. The F2-04RTD module requires no user calibration. However, if your process requires
calibration, it is possible to correct the RTD tolerance using ladder logic. A constant can be
added or subtracted to the actual reading for that particular RTD.
RTD Input Configuration Requirements
The F2-04RTD module requires 32 discrete input points from the CPU. The module can be
installed in any slot of a DL205 system, including remote bases. The limiting factors on the
number of analog modules used are:
• For local and local expansion systems, the available power budget and number of discrete I/O
points.
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For remote I/O systems, the available power budget and number of remote I/O points.
Check the user manual for the particular CPU model being used for more information regarding
the available power budget and number of local, local expansion or remote I/O points.
NOTE : DL230 CPUs with firmware release version 1.6 or later, DL240 CPUs with firmware release 2.5 or later, DL250
CPUs with firmware release version 1.06 or later are required for proper operation.
CH1+
CH2+
COM
CH3+
CH4+
CH1–
CH2–
COM
CH3–
CH4–
F2-04RTD
IN RTD
TEMP
RTD
INPUT
F2-04RTD
+ CH1+
+ CH2+
COM
+ CH3+
+ CH4+
CH1–
CH2–
COM
CH3–
CH4–
F2-04RTD
IN
RTD
INPUT
F2-04RTD
RTD
TEMP