Penn System 450 Series Installation Guide

- For standard control action, select Sn-1, Sn-2,
or Sn-3.
- For standard control action with High Input-
Signal Selection, select HI-2 or HI-3.
- For differential control action, select Sn-d.
- For binary input control of Relay Outputs,
select bIn.
Note:
- You must select a sensor in the Sensor
Selection screen and the selected sensor
must be already set up in the System 450
UI. (See Setting up System 450 Sensors.)
- On System 450 control modules with
network communications, the functional
sensors Sn-d and HI-2 are available,
if Sn-1 and Sn-2 are the same Sensor
Type. If Sn-1, Sn-2, and Sn-3 are the same
Sensor Type, the functional sensor HI-3
is also available.
Then, press Next to save your sensor selection
and go to the Standard Relay ON Selection
screen or the Relay dON Selection.
In the following figure, the top screen example
shows the initial Sensor Selection screen for
Relay Output 1 before a sensor is selected. The
remaining screen examples show some of the
sensors that may be available for selection. For
the Output Relay example, Sn-2 is selected as
the Sensor for Output 1 as shown in the second
screen.
Figure 17: Sensor Selection screens
3. When a Relay Output references Sn-1, Sn-2, Sn-3,
HI-2, or HI-3, press Up or Down in the Standard
Relay ON Selection screen to select the value at
which the output relay turns on. Relay ON is defined
as relay LED On (lit), relay contacts N.O. to C are
closed, and N.C. to C contacts are open. Press Next
to save your selection and go to Relay OFF Selection
screen.
Note: The value ranges and minimum control
band are determined by the Sensor Type
selected for the sensor that the output
references and are enforced in the Relay ON
and Relay OFF Selection screens.
The following figure shows an ON value of 78
(°F) selected for Relay Output 1.
Figure 18: Standard Relay ON Selection screen
When a Relay Output References Sn-d, press
Up or Down in the Differential Relay dON
Selection screen to select the dON value at
which the relay turns on. The dON value is a
differential value that represents the intended
difference in the condition (temperature,
pressure, or humidity) between Sn-1 and Sn-2
(Sn-1 minus Sn-2) at which the relay is turned
on. Depending on the intended control action
and the physical location of Sn-1 and Sn-2
sensors in the condition process, dON may be
a positive or negative value. Press Next to save
your selection and go to Relay dOFF Selection
screen.
Note: The unit of measurement, resolution
increment, minimum control band, and
range of usable values for dON and dOFF are
determined by the Sensor Type selected for
Sn-1 and Sn-2. (See Table 3 and Table 5 for
more information.)
The following figure shows a dON value of 30
(psi) selected for Relay Output 1.
Figure 19: Differential Relay dON Selection screen
When a Relay Output references a hard-wire
sensor (Sn-1, Sn-2, or Sn-3) that is set up with
the bin (binary input) Sensor Type, the ON and
OFF screens are not available. Relay outputs
that reference a sensor set up with the bin
Sensor Type are controlled by the binary input
contacts state (open or closed). The ON and
OFF values are not used to control relay outputs
that reference a binary input sensor. If you
select and save a sensor set up as a binary
input in Step 2, the ON Delay (ONd) screen
appears. Go to Step 5.
4. When a relay output references Sn-1, Sn-2, Sn-3,
HI-2, or HI-3, press Up or Down in the Standard
Relay OFF Selection screen to select the value at
which output relay turns off. Relay OFF is defined as
relay LED Off, relay contacts N.C. to C are closed, and
N.O. to C contacts are open. Press Next to save your
selection and go to Relay-ON Delay Time Selection
screen.
System 450 Series Control Module with Ethernet Communications Installation Guide12

Penn System 450 Series Specifications

General

Brand	Penn
Model	System 450 Series
Category	Control Unit
Language	English