System 450™ Series Modular Control Systems with Standard Control Modules Technical Bulletin
48
When you supply power to a module assembly, the control module polls all of the
connected modules, detects all of the outputs in the module assembly, then assigns
an output number to each output, and enables a
Relay Output Setup Start
(OUTR
x
)
screen for each relay output detected (Figure 22 on page 49).
The first screen in the relay output setup menu flow is the
Sensor Selection
(SENS
x
)
screen. The sensor you select (Sn-1, Sn-2, Sn-3, HI-2, HI-3, or Sn-d) in
this screen determines the Sensor Type parameter ranges and values available in
the remaining output setup screens.
Note:
The condition (temperature, pressure, or humidity), unit of measurement,
minimum differential value, default setup values, and condition value
ranges available in the output setup screens are determined by the Sensor
Type for the sensor that an output references. See Table 2 on page 16 for
more information on sensors that are compatible with System 450 standard
control modules, their Sensor Types, and the values and ranges associated
with each Sensor Type.
Figure 20: Direct Acting Relay (OFF < ON)
Set Up to Control Cooling
Relay State
Relay On
Relay Off
Sensed Temperature
OFF
72°F
Direct Acting Relay
OFF < ON
ON
78°F
Figure 21: Reverse Acting Relay (ON < OFF)
Set Up to Control Heating
Relay State
Relay On
Relay Off
Sensed Temperature
ON
64°F
OFF
70°F
Reverse Acting Relay
ON < OFF
