Chapter 5 Functional Description

Functional Block Description of the 58502AFunctional Block Description of the 58502A

The 58502A electronic circuits consist of five primary blocks:

•Controller

•Panel LEDs

•2-to-1 Switch

•1-to-12 Amplifiers and Isolators

•Power Supply Module

Figure 5-1 is a simplified, overall-block diagram the 58502A circuitry.

 

 

status

Panel

RS-232

 

Controller

LEDs

 

 

Alarm input

 

Alarm/status

 

input

output

 

 

select

condition

 

Input A

 

1- to -12

Output 1

 

Output 2

 

2- to -1

Amplifiers

 

 

Input B

Switch

and

 

 

 

Isolators

Output 12

 

 

 

 

Power

+5 Vdc

 

Power

+15 Vdc

 

Supply

 

 

-15 Vdc

 

(AC )

Module

 

Figure 5-1. Simplified Block Diagram

User’s Guide

5-3