Figure 10-2 Eas Block Diagram - Motorola iDEN Site Controller System Manual

Chapter 10 Environmental Alarm System
EAS Functional Description
BOARD ID RESISTORS
USER ALARM/CONTROL
48
SYSTEM ALARM/CONTROL
RFI-RF3
CONTROL
18
CONTROLLER A-
PARALLEL
CONNECTOR
18
CONTROLLER B-
PARALLEL
CONNECTOR

Figure 10-2 EAS Block Diagram

10-4
The Site Controller and EAS interact in a master/slave relationship. The Site
Controller sends commands to the EAS to determine the status of alarm
inputs or set the state of control outputs. The EAS, in turn, sends alarm
status responses to the Site Controller.
The EAS continuously scans the status of the alarm inputs, ensuring that all
alarms are consistently monitored.
8
OCTAL
BUFFER
OPTO-
OCTAL
ISOLATOR
BUFFER
(X48)
48
CHANGE
DETECT
LOGIC
1 2
1
IEEE 1284
INTERFACE
ADDRESS
LATCH
ADDRESS
IEEE 1284
INTERFACE
Gen 3 Site Controller System Manual
+12 VDC
DC-DC
CONVERTER
RELAY
OCTAL
(X8)
LATCH
TO OCTAL
7
ADDRESS
BUFFERS
DECODE OUTPUT
ENABLE
+5 VDC
-48 VDC FROM
BATTERY
CONNECTOR
3
CONTROL
2
SYSTEM ALARM/CONTROL
3
USER ALARM/CONTROL
TEBTS029
122396JNM
68P80801E30-A 5/1/2002