Installation & Operation Manual – SmartFan Cirrus 6
SmartFan® Cirrus-6
Navigator
Programmer
Part #
Current Rating (60°C)
Input Power
4-Wire Fan Signal Type
4WR6C00-F
6 Amps
Single or Dual
Open Collector PWM
4WR6V00-F
6 Amps
Single of Dual
0-12VDC PWM
4WR12C00-F
12 Amps
Single only
Open Collector PWM
4WR12V00-F
12 Amps
Single only
0-12VDC PWM
H125-F
Hardware Pack (recommended for lower volume applications)
Navigator remote prog r ammer . Required to program the controller when
not connected to an I2C bus.
To sense temperatures off the board, choose a temperature sensor from
www.controlresources.com/sensors.
DC Controller for PWM Speed Controllable (4-Wire) Fans
SmartFan® Cirrus-6 is an off-the-shelf, customer programmable fan controller designed to
manage and monitor up to six 12, 24 or 48VDC 4-wire fans or blowers. Users can create
their own temperature control curve, temperature alarm trigger point, low speed alarm
trigger point, fail safe modes and more. For autonomous temperature control, the
SmartFan Cirrus-6 can be configured using the Navigator PRG00-F han d-held, menudriven remote programmer (pictured above). For systems with I2C, the Cirrus-6 offers
options to adjust temperature control and alarm parameters or directly control fan speed.
Factory customization available for quantities as low as 50 pieces (See page 2 for
customization options).
PRG00-F
Temp Sensors
www.controlresources.com Page 1 of 8 R3.3-1808
Installation & Operation Manual – SmartFan Cirrus 6
Specifications
• Power Source: 10-60VDC, single or
Dual diode OR’d feed
• Extended Voltage ratings: Up to 76VDC
can be achieved when used with the
SmartFan® Multi SD or Storm regulator
• Max Fan Current: 4 Amps per fan, 12
Amps total (4WR12x00-F only)
• Compatible Fans: Up to six 12, 24 or
48VDC 4-wire fans (open collector PWM
or 0-12VDC PWM)
• On board 3.3/5VDC isolated power for
I2C and other control signals
• Control temp accuracy & hysteresis:
±2°C
• Operating Environment: -20 to 60°C, 095% RH
• Storage Temperature : -40 to 125°C
• Weight: 53 grams (1.9oz)
Factory Customization Options
• Up to 3 temperature sensors
• Analog control signals (i.e. 4-20mA, 0-
5VDC…)
• Individual fan fusing
• Custom diode ORing
• Conformal coating
DIMENSIONS (fi g. 1)
Features
• Control Signals & Programming Modes
o I2C interface: Used to control speed
or adjust temperature control
parameters
o Temperature control parameters can
be programmed using the Navigator
remote programmer PRG00-F
• Status and Alarm Reporting
o Fan speed, temperature and alarm
conditions are programmable
through I2C interface and reported
through I2C, LED or MOS relay
connections
o Temperature alarms and fan speed
alarms are programmable with
Navigator remote programmer and
reported through LED or MOS relay
• Factory programming for orders as low
as 50 units
• 2 year warranty
• Made in the USA
• Recognized to UL508 and
CSA-C22.2, File: E100344.
Certified. Ref. Installation section for
conditions of acceptability.
www.controlresources.com Page 2 of 8 R3.3-1808
Installation & Operation Manual – SmartFan Cirrus 6
H125-F Hardware Pack
1
Molex No.
09-50-8041
Terminal
(tin)
Molex No.
08-52-0072
Molex No.
09-50-8021
Terminal
(tin)
Molex No.
08-52-0072
Molex No.
22-01-3047
Terminal
(gold)
Molex No.
08-55-0102
Molex No.
22-01-3127
Terminal
(gold)
Molex No.
08-55-0102
Molex No.
22-01-3047
Terminal
(gold)
Molex No.
08-55-0102
PCB
Support
Essentra No.
CBS-4-19
INSTALLATION
MOUNTING
When mounting over a conductive surface, use a minimum
spacer height of 5mm (.197”) for proper electrical
clearance. The Cirrus 6 meets EU directives EN 60950-1
for safety and EN6100 class A for Emissions and Immunity
when mounted in a conductive enclosure vented to limit
finger access to the board and to maintain an operating
temperature of 60°C or less. For your convenienc e in
lower volume applications, CRI sells an optional hardware
pack, H125-F that includes typical connectors and
mounting hardware (see below).
Table 1: Recommended Hardware
Header
Mfg. & P/N
Qty Description
Mfg. & Part No.
Input Power J7A/J7B (4WR6C00-F, 4WR 6 V00-F)
Connect single or dual 10-60VDC s upplies to J7. For one
supply, connect to A+ and A-, for dual supplies; connect the
second supply to B+ and B-.
Input Power J7B/J14 (4WR12C00-F, 4WR12V00-F)
Connect a single 10-60VDC supply only to J7B and J14.
When total fan current exceeds 6 Amps, make sure to
connect supply to all 4 positive and negative pins.
Controller Status LED Connection J9 (Optional)
Header J9 provides local indication of Alarm (Red LED, Pin
R) and Normal (Green LED, Pin G) status. Choose 2 single
color LEDs or 1 bi-color LED (2 leaded) with a rated forward
voltage (V
) of between 15 and 2 5 mA. Nominal curre nt applied to
(I
f
) between 1.6 a nd 2.4 VD C at a forward c urrent
f
the LEDs is 8 mA.
1 Housing
4
1 Housing
2
6 Housing
24
1 Housing
12
2 Housing
8
-
&
Molex No.
26-60-4040
Molex No.
26-60-4020
Molex No.
22-29-2041
Molex No.
22-29-2121
Molex No.
22-29-2041
5
J7
J142
J1
J6
J12
J9
J11
1
Or equivalent
2
Used for 12A Models only
CONNECTIONS
Refer to table 1, figure 2, t a ble 2 and the par agra phs belo w
to connect your Cirrus 6.
Fan Connections (J1-J6)
Cirrus-6 distributes power to an d monitors the tachom eter
signals from up to s ix four-wire fans. Fan curr ent at each
fan header must not exceed 4 Amps. Total fan current must
not exceed the current rati ng of the Cirrus-6 model being
used.
Figure 2: Connection diagram
www.controlresources.com Page 3 of 8 R3.3-1808
Installation & Operation Manual – SmartFan Cirrus 6
Header
Label
Description
Connection of MOS Relay Alarm J11 (Optional)
A dual MOS relay is provid ed on hea der J 11. Pins 1 A and
1B output is closed on n o a larm . Pins 2A an d 2B o utput is
open on no alarm . The alarm circuits on header J11 are
isolated from all other pins and have no polarity. These
outputs have a maximum on-state resistance of 50Ω.
Maximum sinking current is 100mA. A maximum of 230
VAC/VDC can be applied to alarm terminals.
Remote Temperature Sensor J12 (Optional)
All Cirrus 6 models come with an on board temperature
sensor (T2) that can be used for monitoring board
temperature or controlling fan speed based on temperature.
The Cirrus-6 can also be configured to operate with an
external sensor (sold separately, reference
www.controlresources.com/sensors). Ther e is no polarity
consideration when connecting the sensor. Temperature
accuracy and hysteresis is 2ºC.
Table 2: Connector Pin Assignments
A+ A Power Supply Positive Terminal
J7 / J14
J1- J6
J9
J12
J11
B+ B Power Supply Positive Terminal
A- A Power Supply Negative Terminal
B- B Power Supply Negative Terminal
- Fan, Negative Terminal
C Fan, Speed Control Signal
A Fan, Tachometer Signal
+ Fan, Positive Terminal
GND Green LED Cathode
G Green LED Anode
R Red LED Anode
GND Red LED Cathode
1 I2C Address A0
2 I2C Address A1
3 I2C Address A2
4 Speed Override Input
5 Not Used
6 Not Used
7 External Thermistor Input
D1 SDA for Secondary I2C Bus
C1 SCL for Secondary I2C Bus
D0 SDA for Primary I2C Bus
C0 SCL for Primary I2C Bus
GND Isolated/Logic Ground
1A NC MOS Relay
1B NC MOS relay
2A NO MOS Relay
2B NO MOS Relay
www.controlresources.com Page 4 of 8 R3.3-1808
Speed Override Input J12 (Optional)
A logic level input is located on J12 th at allows the us er to
command the fans t o ful l speed when pin 4 is tied to GN D.
If this input is set to VCC or left open, th en the s pe ed is s et
by its normal oper ating m ode. Default is 100% a nd ca n be
adjusted with the Navigator.
I2C Bus Connection J12 (Optional)
The Cirrus-6 can be used with or without I2C
communications. W hen no I2C is pr esent, t he Cirr us 6 will
control fan speed b y sensing tem perature, programm ing is
®
done via the Smar tFan
Navigat or hand-held programmer,
no additional connections to J12 are required. When using
I2C communications to pro gram, control and monitoring is
provided by a dual or single I2C Bus on pins C0, D0, C1,
D1, see “I2C Program ming and Control” sectio n f or details.
Note: I2C settings are independent from Navigator settings.
I2C settings are not stored. If no system I2C is present use
the Navigator option for programming.
PROGRAMMING FOR TEMPERATURE CONTROL
Cirrus-6 can be programmed using a Navigator PRG00-F
programmer (www.controlresources.com/navigator
controlled and adjusted using an IC2 bus. If using an I2C
system bus, skip this section and go directly to I2C
PROGRAMMING & CONTROL. Cirrus-6 can also be
preprogrammed at the factory in production volumes at no
additional cost, contact CRI customer service for details.
Navigator Handheld Remote Programmer
) or
Installation & Operation Manual – SmartFan Cirrus 6
Table 3: Cirrus-6 Navigator Menu
Options
Selection
Default
SYSTEM
SETTINGS
NUMBER OF FANS
1 - 6
6
External /
On Board
SPEED ON SIGNAL
LOSS
2.5kHz /5.0kHz
/10kHz / 20kHz
CONTROL
SETTINGS
FULL SPEED PWM
100% - 0%
100%
IDLE SPEED PWM
0% - 100%
55%
IDLE TEMP
-20°C to 80°C
35°C
FULL SPEED TEMP
80°C to -20°C
40°C
-20°C to 80°C /
Disabled
ALARM
SETTINGS
No Alarm /
4000 PPM
SELECT PROBE
P, S
P-Series
Cirrus-6
is ready
Set # of fans,
→6
Speed on signal
loss →Full
Set PWM freq.
→2.50kHz
Temp Sensor
→External
Refer to figure 2 and table 3 below to develop and
program your temperature control curve.
TEMP SENSOR
Full / Idle Full
External
Figure 3: Fan speed signal vs. sensor temperatur e.
NAVIGATOR PROGRAMMING
1) Connect Navigator to the Cirrus-6
through the RJ45 connectors using
the Ethernet cable supplied. Apply
power to the Cirrus-6 to enable
programming via the Navigator. See
table 3 for a description of each
programming option.
2) Navigator will display its current
revision briefly then it will show the
product type connected.
3) Select the number of fans (1-6)
connected. The value is adjusted
with the ▲ or ▼ keys and the Next
key will bring you to the next
parameter.
Note: At any time the Previous key
can be used to go back to the
previous menu and the Write Drive
www.controlresources.com Page 5 of 8 R3.3-1808
PWM FREQUENCY
OFF TEMP
TACH TRIP POINT
ALARM TEMP
key can be used to save all the
settings in the Cirrus-6.
4) Use the ▲ or ▼ keys to select the
On-Board temp. sensor or External
temp. sensor (connected at J12 pin 7
& GND) to be used for temperature
control. press the Next key to go to
the next parameter.
5) The Speed on signal loss menu is
used to set a fail-safe fan speed in
case the control signal is lost. At this
point, it is highly recommended that
you start drawing your desired
control curve to help identify the
programmable variables to follow
(refer to figure 3 to model you control
curve).
A setting of “Full” will simulate a
Control Input setting equal to that
programmed in the “Full Temp”
menu, (see paragraph 10). A setting
of “Idle” will simulate an “Idle Temp.”
setting of -25° (see paragraph 9).
2.5kHz
Disabled
1000 / 2000 /
80°C to -20°C /
Disabled
2000 PPM
Disabled
Note: Selecting “idle” upon signal
loss will turn fans off when a low
temperature shut-off is programmed
in step 11.
Once the desired speed is displayed,
press the Next key.
6) Use the ▲ or ▼ keys to select the
PWM frequency. The options are
2.5kHz, 5.0kHz, 10kHz, or 20kHz.
Refer to the fan specification for the
recommended frequency. Once the
desired frequency is displayed, press
the Next key.
7) Use the ▲ or ▼ keys to adjust the
full speed for the fan or motor. This
sets the PWM duty cycle from 0% to
100% in 1% increments. Once the
desired output duty cycle is
displayed, press the Next key.
Installation & Operation Manual – SmartFan Cirrus 6
Set full speed
→100%
Set idle speed
→ 55%
Set idle temp.
→ 35C
Set full temp.
→40C
Set off temp.
→Disabled
Set alarm temp.
→Disabled
Set tach trip
point →2000 PPM
Select Probe
→ P-Series
8) Use the ▲ or ▼ keys to adjust the
idle speed for the fan or motor. This
sets the PWM duty cycle from 0% to
100% in 1% increments. Note the
idle can be set higher than the full
speed for heating applications or to
compensate for fans with reverse
slope input control curves. Once the
desired output duty cycle is
displayed, press the Next key.
9) Use the ▲ or ▼ keys to select the
temperature at which you want the
fans to idle. Options are between
-20°C and 80°C with 1° steps. Once
the desired temperature is displayed,
press the Next key.
10) Use the ▲ or ▼ keys to select
the temperature at which you want
the fans to reach full speed. Options
are between -20°C and 80°C with 1°
steps. Once the desired temp. is
displayed, press the Next key.
11) Use the ▲ or ▼ keys to select
the temperature at which you want
the fans to turn off. Options are
between -20°C and 80°C with 1°
steps or “Disabled”. Fans will not
turn off (as long a power is applied)
when “Disabled” is selected. Once
the desired level is displayed, press
the Next key.
12) Use the ▲ or ▼ keys to select
the tachometer alarm trip point.
When fan speed falls below the trip
point, the alarm output will be
activated and the PWM will be forced
to full speed. The options are “No
Alarm”, 1000PPM, 2000PPM, and
4000PPM. PPM (pulses per minute)
= RPM x PPR (pulses per revolution).
“No Alarm” disables the tachometer
alarm. Once the desired trip point is
displayed, press the Next key.
13) Use the ▲ or ▼ keys to select
the temperature at which you want
an alarm to be triggered. Options are
between -20°C and 80°C with 1°
steps or “Disabled”. Once the
desired level is displayed, press the
Next key.
14) For Rev: 3.3 and above, when
controlling fan speed based on
external temperature, the user can
select the type of Control Resources
temperature sensor connected to
J12. Use the ▲ or ▼ ke ys to select
the probe series (P or S). Note:
Older revisions must use the PSeries sensors only. Press the Next
key to continue.
15) Cirrus-6 will now cycle back to
the “Set # of Fans” screen. To
review the existing parameters of a
programmed Cirrus-6, scroll through
parameters using the Next or
Previous keys. Parameters can be
changed at any time using the ▲ or
▼ keys.
16) Once all parameters are correct,
press the Write Drive key to save
the settings to the Cirrus-6.
Disconnecting power from the
Cirrus-6 before pressing Write Drive
will discard any changes and reload
the parameters from its previous
memory.
OTHER NAVIGATOR FUNCTIONS
Refer to the instructions that came
with your Navigator or down the
datasheet from
www.controlresources.com/navigator
to learn how to:
• Copy a program from one Cirrus
6 to another
• Save a program to Navigator
memory
• Customize a program name
• Recall a program from Navigator
memory
www.controlresources.com Page 6 of 8 R3.3-1808
Installation & Operation Manual – SmartFan Cirrus 6
Table 4: I2C Bus Definitions
ACK
Acknowledge
ACK
Not Acknowledge (End of Transmission)
A6 – A0
Address for Fan Controller, bits 6 – 0
D7 – D0
Data TO/FROM Fan Controller, bits 7 – 0
L7 – L0
Data location being accessed, bits 7-0
P
Stop Bit
R
Read Bit (1)
S
Start Bit
W
Write Bit (0)
I2C PROGRAMMING & CONTROL
When an I2C speed command is given, the Cirrus-6
automatically switches to I2C control mode for fan control
via the I2C Bus. T he speed of all f ans is mapped t o the
command sent through the I2C on header J12. Note:
Navigator settings are ignored in I2C mode and vice
versa.
I2C Bus Protocol
The I2C Bus is configured as a slave device that can
transmit and receive data. When the Cirrus-6 is
configured for I2C based speed control, the user can write
speed commands to the Cirrus-6 and read all alarm status
bits. When configured f or t em perature bas ed co ntro l the
user can read all alarm status bits from the Cirrus-6.
Writing an I2C speed command changes the control
mode from temperature based to I2C based.
Specifications
The Bus supports seven-bit addressing and only acts
as a slave device.
The address for the fan controller is 0001A2A1A0.
General call support is not provided.
The fan controller will stretch the clock further if
needed. The I2C master must observe clock
stretching.
The hardware register will support Standard Mode
I2C with speeds up to 100 KHz, however, lower clock
speeds are recommended for increased noise
immunity.
If temperature control mode is disabled and I2C
speed mode is used, th en I2C communication mus t
occur within ~2 minutes of the last communication, or
there will be an I2C communication timeout error.
When an I2C timeout occurs, full speed will be applied
to the fans, and fan speed must be reset with a new
speed command. Performing any valid I2C operation
on either bus will clear the timeout condition and
restart the watchdog timer.
Fan failure bas ed on 2000 minimum PPM of fan in
slow (default) mode or 4000 minimum PPM in fast
mode. Fan failure is not u pdated w hen the o utput is
set to 0%.
It is possible f or noise to cause the I2C hardwar e to
miss an address or data. In this case a n Ack will not
be generated. The produc tion tester allows 3 err ors
to occur before marking the board as failing. Also
during the EEPROM write cycle the I2C will not
generate ACK signals as no more data can be
accepted until the write cycle is complete. Typical
write cycle is 8ms.
I2C spec ifies a maxim um sink current of 5 ma and
maximum bus capacitance of 400 pF.
Table 4 defines the bits used in the serial bus protocol.
www.controlresources.com Page 7 of 8 R3.3-1808
On Board Power Supply
An isolated 3.3/5.0 VDC is provided on board to power the
I2C Bus and control signal interfaces. The jumper on J10
selects the logic VCC.
Using Sensors with I2C Configuration
Control temperature can be set through the I2C Bus.
When configured to operate with a remote external
temperature sensor, choose a compatible SmartFan
Sensor shown at www.controlresources.com/sensors.
Control temperatur e can also be s et through the I2C for
the board-mounted temperature sensor.
Digital Inputs
The Speed input (Pin 4) and the ID inputs (Pins 1 - 3) are
internally pulled to 3.3 VDC or 5.0 VDC with 10.0KΩ
resistors.
GND (Pin GND)
The ground reference pin is for the I2C Busses and digital
inputs only.
Write sequence
S A6 A5 A4 A3 A2 A1 A0 W Ack L7 L6 L5 L4 L3 L2 L1
L0 Ack D7 D6 D5 D4 D3 D2 D1 D0 Ack P
Read sequence
S A6 A5 A4 A3 A2 A1 A0 W Ack L7 L6 L5 L4 L3 L2 L1
L0 Ack P S A6 A5 A4 A3 A2 A1 A0 R Ack D7 D6 D5 D4
D3 D2 D1 D0 Ack P
Register Locations: L7-L0 Label (R/W) [i n itial
condition]
Register 0x00 – 0xEF: Generic EEPROM storage
(Read/Write) [undetermined]
Register 0xF0: Firmware Revision (Read only) [current
rev]
Installation & Operation Manual – SmartFan Cirrus 6
Register 0xF1: Alarm0 Status (Read only) [0x00]
D0: Status of fan on J1 (0=no fault, 1= fault)
D1: Status of fan on J2 (0=no fault, 1= fault)
D2: Status of fan on J3 (0=no fault, 1= fault)
D3: Status of fan on J4 (0=no fault, 1= fault)
D4: Status of fan on J5 (0=no fault, 1= fault)
D5: Status of fan on J6 (0=no fault, 1= fault)
D6: Always 0
D7: Always 0
Register 0xF2: Alarm1 Status (Read only) [0x00]
D0: Always 0
D1-3: Always 0
D4: Status of speed override (0=normal, 1=100%)
D5: Status of on-board sensor (0=connected, 1=
open)
D6: Status of external sensor (0=connected,
1=open)
D7: Status of controlling sensor (0=valid, 1=alarm)
Register 0xF3: Temperature (Read only) [1111 1111]
on-board sensor
D0-7: Temperature from 0 - 70 in degrees C in 0.5 deg
steps
0XFF = temperature not read yet or open
(Temperatures above 70 are reported as 254)
Register 0xF4: Temperature (Read only) [1111 1111]
external sensor
D0-7: Temperature from 0 - 70 in degrees C in 0.5 deg
steps
0XFF = temperature not read yet or open
(Temperatures above 70 are reported as 254)
Register 0xF5: Current Target Speed (Read only) [0001
0100]
D0-7: 0x14 = 100%, 0x00 = 0%
(Commanded speed with alarm status override included)
(In temperature mode this register will read 0x14)
Register 0xF6: Current Speed (Read only) [0001 0100]
D0-7: 0x14 = 100%, 0x00 = 0%
(What the actual current voltage is)
(In temperature mode this register will read 0x14)
Register 0xF7: Commanded Speed (Read/Write) [1111
1111]
D0-3: 0x14 = 100%, 0x00 = 0%
0x00 – 0x14 = 0 – 100 %, 5% per step
If set to 0xFF then temperature mode is enabled and
I2C speed control disabled
Register 0xF8: Off Temperature (Read/Write) [1111
1111]
D0-7: Temperature from 0 - 70 in degrees C in 0.5 deg
steps
Temperature below which the controller turns off the fan
output (0% PWM)
If set to 0xFF then function disabled
Register 0xF9: Control Temperature (Read/Write) [0101
0000]
D0-7: Temperature from 0 - 70 in degrees C in 0.5 deg
steps
Full speed temperature is only used if Commanded
Speed set to 0xFF.
Register 0xFA: Alarm Temperature (Read/Write) [1111
1111]
D0-7: Temperature from 0 - 70 in degrees C in 0.5 deg
steps
Temperature above which the controller alarms
If set to 0xFF then function disabled
Register 0xFB: Config0 Register (Read/Write) [0011
1111]
D0-D5: 0=Mask, 1=Active for an Fan (J1-J6)
D6-D7: Not Used
Register 0xFC: Config1 Register (Read/Write) [0000
0000]
D0: Not Used
D1-D3: Set to 0, may be set to 1 to allow system to
indicate a fan controller reset.
D4: Probe type, 0=P series, 1=S series
D5: 0=5deg slope, 1=10 deg slope for temperature
mode only
D6: 0=2000PPM tach, 1=4000PPM tach fan alarm
speed
D7: 0=External, 1=On-board sensor selection for
temperature mode only
Register 0xFD-0xFF: CRI Test Register (Reserved)
[xxxx xxxx]
D0-7: Do not use
Note: If a fan failure occurs the Current Speed will be
updated to full but the Commanded Speed will remain at
its previous value. Once the failure clears the Current
Speed will return to the Commanded Speed value. An
I2C timeout changes BOTH the Current Speed and
Commanded Speed to full. The Commanded Speed
must be reset after a timeout. During the speed ramp the
Current Speed will not match the Commanded Speed
until the ramp completes.
www.controlresources.com Page 8 of 8 R3.3-1808
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