DL205 User Manual, 7th Edition Rev. D
vi
Table of Contents
Special Placement Requirements (DL230 and Remote I/O Bases) 6–4
Setting the Module Jumpers 6–5
Jumper Locations 6–5
Selecting the Number of Channels 6–5
Setting Input Type 6–5
Selecting the Conversion Units 6–6
Connecting the Field Wiring 6–7
Wiring Guidelines 6–7
RTD - Resistance Temperature Detector 6–7
Ambient Variations in Temperature 6–8
Wiring Diagram 6–8
Module Operation 6–9
Channel Scanning Sequence for a DL230 CPU (Multiplexing) 6–9
Channel Scanning Sequence for DL240, DL250-1 and DL260 CPUs
(Pointer Method) 6–10
Analog Module Updates 6–10
Writing the Control Program 6–11
Reading Values Pointer Method and Multiplexing 6–11
Pointer Method for the DL240/250-1/260 CPUs 6–11
Negative Temperature Readings with Magnitude Plus Sign for the DL240,
DL250-1 and DL260 CPUs (Pointer Method) 6–13
Magnitude Plus Sign (Binary) 6–14
Magnitude Plus Sign (BCD) 6–14
Negative Temperatures 2’s Complement for the DL240, DL250-1 and
DL260 CPUs (Binary/Pointer Method) 6–15
Understanding the Input Assignments (Multiplexing Ladder Only) 6–15
Analog Data Bits 6–16
Active Channel Bits 6–16
Broken Transmitter Bits (Pointer and Multiplexing Ladder Methods) 6–16
Reading Magnitude Plus Sign Values (Multiplexing) 6–17
Reading 2’s Compliment Values (Multiplexing) 6–18
Scaling the Input Data 6–18
Filtering Input Noise (DL250-1 and DL260 CPUs Only) 6–19
Chapter 7: F2-04THM, 4-Channel Thermocouple Input
Module Specifications 7–2
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