Johnson Controls System 450 Series Installation Instructions And Operators Manual page 43

Table 17: System 450 Web UI Analog Output Configuration Page, User Actions, Descriptions, and
References (Part 3 of 3)
Callout Identifier / Item
Number Name
12 bNd (Output
Deadband)
13 Sensor Failure
Mode of
Operation
14 (Output) Name
15 Ok
Button
16 Cancel
Button
System 450™ Series Control Module with Ethernet Communications Installation Instructions
User Actions, Descriptions, References
Enter the desired bNd (Output Deadband), within which the output signal strength remains
constant. The Output Deadband value is a percentage of the total usable sensor range.
You can set the Output Deadband value to be 0 to 50 of the total range.
In this example, Output Deadband is the default value 0.
Select from the drop-down menu how you want the relay output to respond when the
reference sensor or reference sensor wiring fails.
• If you choose Fail Off, the analog output generates the selected OSP (Output Signal
Strength at Setpoint) value to the controlled device.
• If you choose Fail On, the analog output generates the selected OEP (Output Signal
Strength at End Point) value to the controlled device.
In this example, Fail Off is selected. Therefore, if the reference sensor (Sn-1) or sensor
wiring fail, OUTA-2 provides the selected OSP (10%) to the controlled device until the
sensor failure is resolved.
Assign a 16-character or less web UI name for the analog output.
Note: You are not required to assign an output name. When you assign an output name,
the assigned name is displayed on the Overview page, the System Configuration page, the
Output Configuration pages and the Sensor Configuration page.
In this example, the assigned name is Cond Fan 2.
Click Ok to save any changes you made on this web page and go to the System
Configuration page.
Note: If you leave a web page before clicking Ok, any changes made on the page are not
saved, and the page reverts to the previous values.
Click Cancel to cancel any changes you made on this web page, revert to the previous
values on the web page, and go to the System Configuration page.
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