Omni SD-DC —
INSTALLATION
Mounting
Installation & Operation
OPERATION
Fan Speed vs. Sensor Temperature
The relationship between fan speed, as a
percentage of full speed, and sensed temperature
is shown in Figure 2. Full speed occurs at the
Control Temperature (T
c
).
Fan Speed vs. Sensor Temperature
To minimize EMI, mount the unit on a grounded
surface using a metal spacer at the mounting
hole that is surrounded by a conductive pad.
Sensor Selection
Sensors are shown on page 34. There is no polarity
consideration when connecting the sensor.
100%
Connections/Jumpers
SENSOR
S 1 EC
Figure 2
Fan speed vs
sensor temperature
50%
J2
J3
45
40
35
TC - 3ºC
TC ºC
V1
R1 >= Va / 1 , kOhms
Va <= 30 VDC
V1 = Va, Above Trigger
V1 <= 0.4, Below Trigger
V1 = Va, Power Off to Unit
Settings
R1
Va
Control Temperature (J2):
Use this jumper to set
Control Temperature to 35°, 40°, or 45°C. Factory
setting is 40°C. If the P3 sensor is used, Control
Temperature settings are 74°, 80°, and 86°C.
Temperature Alarm Output (J3)
J1
- P +
Vs
+ F -
+ F -
FAN(S)
An over-temperature alarm output is provided
at header J3 to drive a logic circuit. Pins J3:C
and J3:E are internally connected to the collector
and emitter of a phototransistor, respectively.
This output is intended for connection to a
logic circuit.
Alarm Type:
Trigger:
Alarm States:
Optically Isolated Phototransistor
10°C Above Control Temperature
Conducting (Closed), Below Trigger,
Cut-Off (Open), Above Trigger,
Cut-Off (Open), Un-powered State
30 VDC
1 mA DC
POWER
SUPPLY
J1 – Input Power and Fan Power
J2 – Control Temperature Setting
J3 – Sensor Input and Alarm Output
Figure 1
Wiring Diagram
Max. Voltage:
Max. Current
Suggested Connecting Hardware
Ref.
Desc.
J1
J3
Header on
Board
1
26-48-1065
22-29-2041
H104 Hardware Pack
Description
Manufacturer
1
Housing
Terminal (tin)
Housing
Terminal (gold)
PCB Support
Aluminum Spacer
Screw, 6-32X 5/8
Nut, 6-32
1
Quantity
1
6
1
4
4
1
1
1
Part Number
1
09-50-8061
08-50-0106
22-01-3047
08-55-0102
CBS-4-19
ALSS6-2
Molex
Molex
Molex
Molex
Richco
Richco
CONTROL
RESOURCES
INCORPORATED
or equivalent
E-mail: sales@controlres.com
s
Web: www.controlres.com
33
ETC [ ETC ]
