Installation - Model Number Interpretation 
Release M    DR4500A Classic Series Circular Chart Recorder With or Without Control Product Manual  15 
April 2017     
View of hardware components 
Figure 2-2 shows the location of the actual hardware components for key number DR45A1 or DR45A2. 
 
Key Number: DR45A1
Main processor 
board (common)
#2 #1
Input PCB's 
 *Table I - XX00 
    X = 0,1, or 3
Alarm output/digital input PCB 
 *Table III - XX1
Control output #1 PCB 
 *Table II - 1X, 6X
Mother PCB (f or control and 
selected options)
22077
* Refer to Model Selection Guide
Key Number: DR45A2*
Pen 1
Pen 1Pen 2
Auxiliary  Output PCB 
*Table III – 1XX 
 or 
Modbus RS485 
Communications PCB 
•Table III – 3XX 
 or 
Modbus RS485 
Communications/Auxiliary  
Output PCB 
*Table III – 4XX
Control Output #2 PCB 
•Table II – X1, X6
 
 
Figure 2-2   DR4500A recorder hardware components versus “table” selections