Module Specifications - Automation Direct DL405 User Manual

9–2
F4–08RTD 8-Channel RTD Input

Module Specifications

Module
Calibration
RTD Input
Configuration
Requirements
The F4–08RTD 8 Differential Channel RTD Input
module provides several features and benefits.
S
It provides eight RTD input channels with
16-bit resolution.
S It automatically converts 10 Ω , 25 Ω, 100 Ω,
1000 Ω RTD signals into direct
temperature readings. No extra scaling or
complex conversion routines are required.
S
Temperature data format is selectable
between °F or °C , magnitude plus sign or
twos complement.
S
The module is capable of converting both
European and American type
100 Ω RTDs and European type1000 Ω
RTDs.
S
Precision lead wire resistance compensation
by dual matched current sources and
ratiometric measurements.
S
Temperature calculation and linearization are
based on data provided by NIST (National
Institute of Standards and Technology).
S
Diagnostics features include detection of RTD
short or disconnection.
The F4–08RTD module requires no calibration; however, if your process requires
calibration it is possible to correct the RTD tolerance using ladder logic to subtract or
add a constant to the actual reading for that particular RTD.
The F4–08RTD Input Module requires 32 discrete input points from the CPU. The
module can be installed in any slot of a DL405 system, including remote bases. The
limitations on the number of analog modules are:
S
For local and expansion systems, the available power budget and
discrete I/O points.
S
For remote I/O systems, the available power budget and number of
remote I/O points.
Check the user manual for your particular model of CPU for more information
regarding power budget and number of local or remote I/O points.
RTD INPUT
8 CHANNELS
F4–08RTD
RTD
INPUT
CH1
+
CH1
–
CH2
+
CH2
–
COM
COM
CH3
+
CH3
–
CH4
+
CH4
–
CH5
+
CH5
–
CH6
+
CH6
–
COM
COM
CH7
+
CH7
–
CH8
+
CH8
–
F4–08RTD