Enviro EA800 - Manual (Page 19)

General Information
D-011-0152 15
Relay Operation
This section describes the operation of the base unit's relays. The relays must be programmed correctly so that
their outputs provide the desired signaling to the alarm panel.
High Alarm
Limit
• Blue, Red and White
temperature sensors
• HA-III+
• 4-20mA sensor
• Wireless humidity
sensor
• Wireless
temperature sensor
The High Alarm Limit sets the value that trips the high alarm when
exceeded.
Alarm Delay
Time
All This sets the time period that an alarm condition can exist before the
alarm is triggered. This is useful for helping to prevent false alarms from
occurring in situations where normal activities cause conditions to tem-
porarily exceed alarm thresholds. For example, the temperature in a
freezer may temporarily rise above the High alarm limit while frozen food
is being restocked and the freezer door is open, but the delay prevents
the alarm from going off unless the temperature fails to cool below the
alarm threshold within the alarm delay period.
Table 12 Relay Configuration Settings
Relay Setting Description
No Alarm
Relay State:
De-Energized (default)
No Alarm: Power is removed from the relay coil as shown below.
Alarm: Power is applied to the relay coil as shown below.
No Alarm
Relay State: Energized
No Alarm: Power is applied to the relay coil as shown below.
Alarm: Power is removed from the relay coil as shown below. This provides for a
default alarm if the EA800 loses power in addition to the sensors' alarms.
Active Condition:
Alarm Only
Sets the alarm to be active when an alarm condition exists.
Active Condition:
Alarm or Warning (default)
Sets the alarm to be active when an alarm condition exists or a warning is active.
Table 11 Sensor Parameter Descriptions — continued
Parameter Applicable to Sensors Description
NC
NO
To
alarm
panel
From
EA800
logic
Idc = 0
C
NC
NO
To
alarm
panel
From
EA800
logic
Idc
C
NC
NO
To
alarm
panel
From
EA800
logic
Idc
C
NC
NO
To
alarm
panel
From
EA800
logic
Idc = 0
C