Enviro EA800 - Manual (Page 7)

General Information
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Block Diagrams
Figure 2 shows a block diagram of the base unit interfaces and functions. The EA800 provides eight relays for
indicating when a programmed alarm limit has been exceeded or a warning condition exists. An additional AUX
(Auxiliary) Output relay provides an output signal to an optional audible alarm or strobe that is activated whenever
an alarm condition exists.
Figure 2 EA800 Environmental Alarm System Block Diagram
The EA800 can be made part of a larger security system as shown in Figure 3. In a security system there may be
more than one EA800 installed along with other components such as the Winland EA200 or EA400 multi-zone
environmental alarm systems.
Figure 3 Facility Security System Block Diagram - Example
Sensor 5
Sensor 6
Sensor 7
Sensor 8
Wireless Sensors
Relay 1 Output 1
Output 2 Relay 2
Output 3 Relay 3
Output 4 Relay 4
Output 5 Relay 5
Output 6 Relay 6
Output 7 Relay 7
Output 8 Relay 8
EA800 Base Unit
Aux Output RF Receiver
Sensor 1
Sensor 2
Sensor 3
Sensor 4
System Control
Relay 9
Relay 1 coil control logic
Relay 2 coil control logic
Relay 3 coil control logic
Relay 4 coil control logic
Relay assignment
and coil control logic
Alarm Panel
From other
EA800, EA400, and EA200
Environmental Alarm Systems
Sensor 5
Sensor 6
Sensor 7
Sensor 8
Wireless Sensors
Relay 1 Output 1
Output 2 Relay 2
Output 3 Relay 3
Output 4 Relay 4
Output 5 Relay 5
Output 6 Relay 6
Output 7 Relay 7
Output 8 Relay 8
EA800 Base Unit
Aux Output RF Receiver
Sensor 1
Sensor 2
Sensor 3
Sensor 4
System Control
Relay 9
Relay 1 coil control logic
Relay 2 coil control logic
Relay 3 coil control logic
Relay 4 coil control logic
Relay assignment
and coil control logic
Sensor 5
Sensor 6
Sensor 7
Sensor 8
Wireless Sensors
Relay 1 Output 1
Output 2 Relay 2
Output 3 Relay 3
Output 4 Relay 4
Output 5 Relay 5
Output 6 Relay 6
Output 7 Relay 7
Output 8 Relay 8
EA800 Base Unit
Aux Output RF Receiver
Sensor 1
Sensor 2
Sensor 3
Sensor 4
System Control
Relay 9
Relay 1 coil control logic
Relay 2 coil control logic
Relay 3 coil control logic
Relay 4 coil control logic
Relay assignment
and coil control logic