Introduction, Hardware, Circuit operation – Basler Electric BE1-79A 9310200114 User Manual
Page 21: Inputs, Section 3, Functional description -1, Introduction -1, Hardware -1, Circuit operation -1, Inputs -1
SECTION 3
• FUNCTIONAL DESCRIPTION
Introduction
BE1-79A relays are microprocessor-based devices that provide automatic reclosing of circuit breakers.
This section describes the hardware, circuitry, and software of the BE1-79A.
Hardware
The BE1-79A is supplied as an FT-32 cradle without a case.
Circuit Operation
This description of circuit operation is divided into Inputs, Microprocessor, and Outputs. BE1-79A circuit
functions are illustrated in Figure 3-1 and described in the following paragraphs.
Figure 3-1. Function Block Diagram
Inputs
The four types of BE1-79A inputs are:
•
Operating power
•
Contact sensing inputs
•
Reset switch
•
Serial communication port
52a
52b
MICROPROCESSOR
Close
ISO
ISO
EEPROM
Settings and Status
Memory
RAM
Operating
Memory
ROM
Program
Memory
AC/DC
Power
Reset
Watchdog
Timer Circuit
Power Supply
RS-232
LED
Indicators
P0064-82
Alt. Close 1
Alt. Close 2
RS
Lockout
9310200893 Rev C
BE1-79A Functional Description
3-1