O
1/27/2021
Kele, Inc. • 3300 Brother Blvd. • Memphis, TN 38133
3
E
LECTRICAL
I
NSTALLATION
The controller is not equipped with a power switch; it is operational whenever sufficient power is applied to the
power input terminals.
All electrical connections to the controller are made through screw terminals that can be unplugged
landing of wires. The controller’s enclosure contains
installation; refer to Figure 1 and
Figure
3.1
A
NALOG
O
UTPUT
C
ONNECTIONS
The sensor’s readings are reported at the controller’s
20mA analog output connections. Current flows out of the ‘+’
terminal and returns to the ‘-‘ terminal
The oxygen sensor output is provided at the terminal
Figure 3. Analog output connection has polarity as labeled on the
controller silkscreen: care must be taken to ensure proper
connection. To wire the analog output connections:
1.
Power down the controller, this can be done by unplugging
the controller power terminal (see
2.
Unplug the analog output screw terminal
3.
Attach the signal wires, paying close attention to the
polarity.
4.
Plug the analog output screw terminal back into the
controller.
3.2
R
ELAY
C
ONNECTIONS
The controller has two, 10 Amp, 120/277
relay output connections (shown In
Figure
loads up to 10 Amps. The relay connections have three
connectors that allow devices to be wired to the controller in
normally-open (
NO
) or normally-closed (
outputs are activated when ambient air
below the controller threshold settings (refer to
information).
In the
NO Configuration
, the voltage attached to the
be present at the
COM
terminal
only when
activated.
In the
NC Configuration
, the voltage attached to the
the relay output is deactivated:
the voltage attached to the NC terminal is removed when the relay output is
activated.
OS-2 Oxygen Sensor
Kele, Inc. • 3300 Brother Blvd. • Memphis, TN 38133
NSTALLATION
The controller is not equipped with a power switch; it is operational whenever sufficient power is applied to the
All electrical connections to the controller are made through screw terminals that can be unplugged
er’s enclosure contains conduit knockouts on all sides for flexibility during
Figure 2
for details and dimensions of the enclosures.
ONNECTIONS
The sensor’s readings are reported at the controller’s powered 4-
Current flows out of the ‘+’
‘ terminal.
output is provided at the terminal highlighted in
. Analog output connection has polarity as labeled on the
controller silkscreen: care must be taken to ensure proper
connection. To wire the analog output connections:
Power down the controller, this can be done by unplugging
ler power terminal (see Figure 6).
Unplug the analog output screw terminal labeled O1.
paying close attention to the
Plug the analog output screw terminal back into the
ONNECTIONS
/277 VAC rated, SPDT dry-contact
Figure 4
) that can directly control
The relay connections have three-terminal screw
connectors that allow devices to be wired to the controller in either
closed (
NC
) configuration. These
outputs are activated when ambient air oxygen concentrations fall
the controller threshold settings (refer to
Section 4.2
for more
, the voltage attached to the
NO
terminal will
only when the relay output is
, the voltage attached to the
NC
terminal will be present at the
COM
terminal
the voltage attached to the NC terminal is removed when the relay output is
FIGURE 3:
Analog Output
Figure 4
: Relay Outputs
Page 3 of 14
The controller is not equipped with a power switch; it is operational whenever sufficient power is applied to the
All electrical connections to the controller are made through screw terminals that can be unplugged for easy
conduit knockouts on all sides for flexibility during
terminal
only while
the voltage attached to the NC terminal is removed when the relay output is
Relay Outputs
