Johnson Controls System 450 Series Installation Instructions Manual page 9

Table 5: System 450 Relay Output Setup Screen Information, and User Actions (Continued)
LCD Screen Name, Description/Function, User Action, and Example
Edit Sensor Screen: This screen displays the sensor that this output currently references. Typically, no
Sn-2
action is taken in this screen. But if you need to change the sensor that this output references, you can
select a different sensor for this output in this screen.
SENS
Note: Changing the sensor that an output references to a sensor with a different Sensor Type changes
the default setup values for the output, and requires setting up the output again.
8. To change this output's sensor, Press UP or DOWN to select the sensor that this output will
reference. After you select a different sensor for this output, press NEXT to return to the Relay
ON Selection screen (Step 3 above) and repeat the output relay setup procedure for this output
and the new Sensor Type values associated with the new sensor selection.
If you do not need to change this output's sensor, simply press NEXT to save the current
sensor selection and return to the Relay Output Setup Start screen.
This Relay Output is now set up in the System 450 UI.
Example shows input Sensor 2 selected for Output 1 (Output 1 references Sensor 2).
Relay Output Setup Start Screen
-- -
After you have set up this Relay Output, you can go to another Output Setup Start screen, the Sensor
Setup Start screen, or return to the Main screens.
OUTR
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9. Press MENU to scroll through the remaining Output Setup Start screens and return to the
Sensor Setup Start screen, or press UP and DOWN simultaneously and hold for 5 seconds to
return to the System 450 Main screens.
Example shows the Relay Output Setup-Start screen for Output 1.
Setting up an Analog Output (OUTA
Analog outputs provide an auto-selecting analog signal
that is proportional to the sensed input condition. The
analog output circuit senses the impedance and
automatically selects 0-10 VDC or 4-20 mA operation.
The control action between the input signal and the
output signal can be set up four different ways,
depending on the values selected for the Setpoint (SP),
End Point (EP), %Output Signal Strength at Setpoint
(OSP), and %Output Signal Strength at End Point
(OEP). The LCD displays different Control Ramp icons
for the four control actions.
Figure 6 shows an example of the analog output setup
values and the resulting output signal in a typical space
heating application (SP > EP and OSP < OEP).
Proportional
Band
100% OEP
10%
0%
65°F
Less
Condition Value
Figure 6: Control Ramp Example for a Typical
Heating Application (SP > EP and OSP < OEP)
System 450™ Series Control Modules with Analog Outputs Installation Instructions
#
)
SP > EP
°F
SP = 70 ( )
°F
EP = 65 ( )
OSP < OEP
OSP = 10 (%)
OEP = 100 (%)
OSP
70°F
Greater
Table 6 shows the four Control Ramp icons and the
associated analog output setup value relationships.
Table 6: Analog Output Control Ramp Icons
Control Ramp Analog
Displayed on Output Value
LCD Relationships
SP < EP
OSP < OEP
SP > EP
OSP < OEP
SP > EP
OSP > OEP
SP < EP
OSP > OEP
See Table 7 for analog output setup information and
procedures.
Output Signal
Strength at
Setpoint
Minimum
Minimum
Maximum
Maximum
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