Ebmpapst CN1090 Manual

Operating and Maintenance Instructions
210-OMI13277_Iss1.doc ORIGINAL INSTRUCTIONS Page 1 of 15
ebm-papst UK Ltd, 2012 Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: [phone] Fax: [phone]
e-mail [email protected]bmpapst.com
CN1090
Table of Contents
Introduction .............................................................................................................................................................. 2
Specification ............................................................................................................................................................ 2
Connection Details (see “Terminal Block Use” below”) ........................................................................................... 2
Fan Compatibility ..................................................................................................................................................... 3
Mechanical Outline .................................................................................................................................................. 3
Safety ...................................................................................................................................................................... 3
EMC Compliance..................................................................................................................................................... 3
ESD ......................................................................................................................................................................... 3
Installation ............................................................................................................................................................... 4
Proportional Band Control, Operation ..................................................................................................................... 5
Proportional Band Control, Commissioning ............................................................................................................. 7
Constant Pressure Control, Operation .................................................................................................................... 9
Constant Pressure Control, Commissioning ............................................................................................................ 9
Controller Operation, General: Run Enable Inputs, LED’s, Relays, Power-up Check ........................................... 12
Fan Run Control: ............................................................................................................................................... 12
Fan Monitor: ...................................................................................................................................................... 12
Alarm Relay:...................................................................................................................................................... 12
Fan Run Relay: ................................................................................................................................................. 12
Fan Maximum Speed Relay (Change-over contacts): ...................................................................................... 12
Power-up Check................................................................................................................................................ 12
Maintenance and Servicing ................................................................................................................................... 12
Use of ebm-papst RM-ECv Controller for local manual control ............................................................................. 12
Terminal Block Use ............................................................................................................................................... 13
PCB Component Location and Live / SELV Circuit ............................................................................................... 14
Declaration of Conformity ...................................................................................................................................... 15
The most recent version of this document may be downloaded at: www.ebmpapst.co.uk/instructions
Part No
CN10
90
Description
Demand Ventilation
Controller
(Proportional Control or Constant Pressure
Issue
Date
Bug no
Comments
G draft
17 Jan 2013
1401
Identify Live and SELV parts of circuit
1
5 Feb 2013
1401
First numeric Issue
, added CE cert page 1

Operating and Maintenance Instructions
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ebm-papst UK Ltd, 2012 Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: [phone] Fax: [phone]
e-mail [email protected]bmpapst.com
CN1090
Introduction
Commercial Demand Ventilation Controller, mains powered with enclosure, fan speed control of one/two fans.
Proportional Band Control: Fan Speed varies based on either one or two 0-10V proportional sensor inputs
(Temp, RH, CO
2
), Proportional Band set by Variable Resistors, Fan Speed range set by rotary DIP switches.
Constant Pressure Control: Pressure maintained at set-point, 0-10V pressure sensor input, PID control.
Pressure set-point(s) set by rotary DIP switch(es) or by second 0-10V Input (BMS or external Potentiometer).
Options: set by on-board DIP switches, selection of Stop/Run and Set-points or fan speed by switched 230VAC
and volt-free inputs. Timed alternate fan run, with simultaneous run option. With indicators and alarm outputs.
Specification
CN
10
90
Supply Voltage
V AC
207
–
253 V
AC
AC line Frequency
Hz
47
–
63 Hz
Supply Current
A
0.05
Amps
, plus Fan load if wired via PCB 13A max.
Alarm Relay
s
Contact
rating
, 1
00mA
max,
60VDC max
0
-
10V Inputs
100kOhm
impedance
, minimum
PWM frequency 2kHz
Operating Environment
-
30 to 60C, IP66 Enclosure
Connection Details (see “Terminal Block Use” below”
Mains Connector J1
Pin
Function
SL1
1
Switched Live 1,
Fan Speed /
Set
-
point
s
elect
i
nput
SL2
2
Switched Live 2,
Stop/Run contr
ol i
nput (shipped with link to 230VAC Live to
Run
)
L
3
230VAC, Live (for
Stop/Run control
link)
L
4
230VAC, Live (
Supply
to Fan)
L
5
230VAC, Live (Input
L
6
230VAC, Live (
Supply
to Fan)
N
7
230VAC, Neutral (spare)
N
8
230VAC, Neutral (
Supply
to Fan)
N
9
230VAC, Neutral (Input
N
10
230VAC, Neutral (
Supply
to Fan)
E
11
Earth (
Supply
to Fan)
E
12
Earth (Input
E
13
Earth (
Supply
to Fan)
E
14
Earth (spare)
Control Connector One, J2
Pin
Function
1
Alarm Relay, Contact A
(Contacts Closed = No Al
arm)
2
Alarm Relay, Contact B
3
Fan 1 Speed
Control 0
-
10V
Output
4
Fan 1 Tachometer Open Collector / Relay Input
5
Fan 1 GND / 0V
6
Fan 2 Speed Control 0
-
10V
Output
7
Fan 2 Tachometer Open Collector / Rela
y Input
8
Fan 2 GND / 0V
9
Volt Free
Sel
ect Input
1
10
0V for
Select Input
1
11
Volt Free
Stop/Run control i
nput, (shipped with link to 0V to enable
fan run
)
12
0V for Stop/Run
13
Volt Free Select Input
2
14
0V for
Select Input
2

Operating and Maintenance Instructions
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CN1090
Control Connector Two, J3
Pin
Function
1
Fan Run
Relay, Con
tact A
(Contacts Closed = Fan Running)
2
Fan Run
Relay
, Contact B
3
0
-
10V Input
, Sensor One
/ Pressure Sensor
4
3V3
(RESERVED)
5
0
-
10V Input
, Sensor Two
/
External
Pressure Set
-
point 0
-
10V
6
0V
for Sensor
7
Volt Free Select Input
3
(RESERVED)
. DO NO
T CONNECT.
8
0V
for Sensor
9
24V
DC
Unregulated
Output, 25mA max
imum, sensor supply
10
Relay
3
, Normally Open Contact
(
Contacts Closed = Fan below Maximum Speed)
11
Relay
3
, Common Contact
12
Relay
3
, Normally Closed Contact
(Contacts Open = Fan below
Maximum Speed)
13
3
V
3
(RESERVED)
14
0
-
10V Input
3
,
(RESERVED)
Note: all “0V” terminals on J2 & J3 are commoned.
Fan Compatibility
Fan Speed control outputs compatible with EC 0-10V or Open Collector PWM speed controlled fans, 2kHz PWM,
maximum of 12 EC Fans per 0-10V output.
Tachometer / Relay monitor input compatible with Open Collector tachometer (1-2 fans) or Relay Alarm fans.
Mechanical Outline
Enclosure 180(L) x 94(W) x 57(H), transparent lid for LED visibility, fixing centres 165 x 79mm
PCB 157mm x 71mm, Hole centres 146 x 60mm. Height 31mm max.
LED Identification LED “Fan1” and “Fan2” Run and Alarm, indicated by PCB silk screen legend
LED “En” Run Enable and LED “B” Fast, indicated by PCB silk screen legend
Trimmer Identification Trimmer indicated by PCB silk screen legend, R1, R2, R3 and R4
IP Rating IP66 with Enclosure.
Cable Glands Not included. Enclosure supplied, has “knock-outs” to suit 16mm or 20mm glands.
Safety
•Installation must be by qualified personnel in accordance with local applicable standards.
•This equipment must be Earthed.
•Access is limited to service personnel only. Live parts accessible when cover removed.
•Residual risk of contact with fan. Maintenance personnel should take due care and attention.
•Complies with Low Voltage Directive 37/23/EEC as amended by 93/68/EEC
•Complies with EN60335-1 - Specification for safety of household and similar electrical appliances
•Connector J1 Terminals SL1 and SL2 may be live even with the controller supply disconnected
•EC Fans use Capacitors to store mains voltage. Contact with the mains wiring must be avoided for 5
minutes following supply disconnection.
EMC Compliance
BS EN61000-6-3:2007 (emissions), BS EN61000-6-2:2005 (immunity)
Radiated Emissions BS EN55022:2006, Class B, Radiated Immunity EN61000-4-3:2002 +A1+A2
Fast Transient Bursts EN61000-4-4:2004, Conducted Immunity EN61000-4-6:2007
ESD
Many modern electronic components are susceptible to damage from Electro Static Discharge (Static Electricity).
During commissioning, avoid unnecessary contact with electronic components on PCB’s.
PCB’s which are Static Sensitive should be stored in anti-static packaging until installed.

Operating and Maintenance Instructions
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ebm-papst UK Ltd, 2012 Chelmsford Business Park Chelmsford Essex CM2 5EZ
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CN1090
Installation
General:
See “Safety” information above.
For connections, see Connection Details table above. Route control wiring separately from AC mains wiring.
Remove enclosure knock-outs as required to fit cable glands, taking care not to damage the PCB. Cable entry at
enclosure end is recommended.
Tools:
A 2.5mm flat screwdriver is recommended for the screw terminal block clamps and Variable Resistor adjustment.
A voltmeter is required during commissioning.
230VAC Supply:
Controller connection to 230VAC supply must be fused to 13A maximum.
The supply for single phase fans up to 13A total load may be connected via this control PCB, connect Fans to
230VAC output and Earth output terminals. For higher currents or 3-phase fans route supply direct to fans.
Proportional Band Control:
Connect first sensor to “0-10V Input, Sensor One“ (J3 pin 3) and “0V“ (J3 pin 6), plus “24VDC Unregulated
Output, 25mA max“ (J3 pin 9) if required
If used, connect second sensor or Local / Remote BMS 0-10V control to “0-10V Input, Sensor Two / External
Pressure Set-point 0-10V input“ (J3 pin 5) and “0V“ (J3 pin 8), plus “24VDC Unregulated Output, 25mA max“ (J3
pin 9) if required.
Constant Pressure Control:
Connect pressure sensor to “0-10V Input, Sensor One“(J3 pin 3) and “0V“ (J3 pin 6), plus “24VDC Unregulated
Output, 25mA max“(J3 pin 9) if required.
If used, connect External Pressure Set-point 0-10V to “0-10V Input, Sensor Two / External Pressure Set-point 0-
10V input“(J3 pin 5) and “0V“(J3 pin 8).
Fans:
Connect fan supply, speed control and tachometer leads, see table above for connections. If fan has a 10V
output wire cut back & insulate. If fans are Alarm Relay type (not Tachometer), connect fan relay between 0V and
tachometer Input. If fan monitoring is not required, then link tachometer Input to 0V to prevent alarms.
Select Inputs:
Connect Run/Stop and Speed/Set-point select inputs as required for the application, see Tables below.
PCB Switches and Variable Resistors:
Set DIP Switches and Variable Resistors as required, see tables and procedures below.
DIP Switch 1
Position
OFF
ON
1
Proportional Band Control mode
Constant Press
ure PID Control mode
2
Two Fans
Single Fan
, Fan1 only
3,4
Simultaneous
/
Alternate
Fan
Run Changeover Period
Run
, see table
5, 6
See tables below
7
Fan
1
PWM, Open Collector
Fan
1
PWM, 0
-
10V
8
Fan
2
PWM, Open Collector
Fan
2
PWM, 0
-
10V
DIP Switch 1
Position
Simultaneous / Alternate Fan Run
Changeover Period (Hours
Fan Fail action
3
4
Off
Off
Simultaneous Fan
Run
(Alternate run at low airflow)
Remaining fan runs faster
ON
Off
6
Swap to standby fan
Off
ON
12
ON
ON
24
See Proportional Control Band or Constant Pressure Control sections below for additional settings.

Operating and Maintenance Instructions
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CN1090
Proportional Band Control, Operation
The controller varies the fan speed to the level required, based on the sensor measurement (“airflow demand”),
as shown in the Proportional Band Control Profile drawings below.
If two sensors are in use the fan speed will be set to the higher of the two fan speed demand levels.
Select inputs can be used to force the Fan Speed to Minimum, Maximum, or set to the Proportional Band
Demand Speed.
The Variable Resistors and rotary DIP switches configure the operation as shown below:
Example Proportional Band Control Profile, Sensor 1
0 1 2 3 4 5 6 7 8 9 10V
Example Proportional Band Control Profile, Sensor 2
0 1 2 3 4 5 6 7 8 9 10V
Max speed,
Rotary Switch
S3
Sensor 1 Voltage
Min Speed,
Rotary Switch
S
2
Top of
Control band 1
R2
Sensor
1
Reading
Max speed,
Rotary Switch
S3
Sensor
2
Voltage
Min Speed,
Rotary Switch
S2
Top of
Control band 2
R4
Bottom of
Control Band 2
R
3
Demand
Fan
Speed
Bottom of
Control Band 1
R
1
Demand
Fan
Speed
Sensor
2
Reading
10V
9
8
7
6
5
3
2
1
0
10V
9
8
7
6
5
3
2
1
0

Operating and Maintenance Instructions
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CN1090
Fan Speed Select
Inputs
J1, J2
Proportional Band Control
,
Fan Speed
FAN STOP
Minimum
Speed,
S2 setting
Proportional
Band Control,
Sensor Demand
Maximum
Speed,
S3 setting
SL2, Switched
Live Input 2
Stop/Run
(J1 pin 2
Open
-
Linked to
230VAC
Linked to
230VAC
Linked to
230VAC
Volt Free Stop/Run
(J2 pin 11
-
Open
Linked to 0V
Linked to 0V
Linked to 0V
SL1, Switched
Live Input 1
(J1 pin 1
-
-
Open
-
Linked to
230VAC,
and
DIP SW 6
OFF
-
Linked
to
230VAC,
and
DIP SW 6
ON
Volt Free Select
Input 1 (J2 pin 9
-
-
Open
Linked
to 0V
-
-
-
Volt Free Select
Input 2 (J2 pin 13
-
-
Open
Open
Open
Linked
to 0V
-
In the above table “-” indicates “Input state ignored”
DIP Switch 1
Position
Proportiona
l Band Control
, Options
OFF
ON
5
Normal
Operation
Commissioning, see table below
6
SL1 selects
Sensor Demand
Fan Speed
SL1 selects
Maximum
Fan Speed
, S3 setting.
DIP Switch 1
Position
Proportional Band Control
,
Commissioning
5
6
PWM Outputs
Indicato
r LED
ON
Off
Fan 1 Speed Control PWM
Output
= R1 Setting
Fan 2 Speed Control PWM Output = R2 Setting
NTC1 Red LED Pulse
ON
ON
Fan 1 Speed Control PWM
Output
= R3 Setting
Fan 2 Speed Control PWM Output = R4 Setting
NTC2 Red LED Pulse
Off
-
Normal Operati
on,
Fan 1 Speed Control PWM Output = Fan 1 speed control
Fan 2 Speed Control PWM Output = Fan 2 speed control
NTC1 & NTC2 Red LED Off
Variable
Resistors
Proportional Band Control
, Set
-
points
R
1
Sensor 1, input voltage at bottom of proportional band
1
R
2
Sensor 1, input voltage at top of proportional band
1
R
3
Sensor 2, input voltage at bottom of proportional band
2
R
4
Sensor 2, input voltage at top of proportional band
2
Rotary DIP
Switch
Proportional Band Control
,
normal
profile, Fan Speed Range
Invert Speed Control Output
(Heating Profile , Fan Speed Range
S2
Fan Minimum Speed
Fan Maximum Speed
S3
Fan Maximum Speed
Fan Minimum Speed
To invert Speed Control Output (Heating Profile), make S2 setting higher than S3 setting.

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CN1090
Proportional Band Control, Commissioning
Note - during this procedure the Control Band Set-points (sensor output voltage set-points) will be temporarily
connected to the Fan Speed control outputs to allow their values to be simply measured with a voltmeter. The
commissioning procedure has two parts;
1) Set the Proportional Band Set-points
2) Set the Fan Minimum and Maximum speeds.
Caution – during this procedure the Fan Speed Control voltage outputs will not be limited by the S2 & S3 setting.
Both outputs may be active.
Set the Proportional Band set-points:
1) Determine the Proportional Band set-point voltages required for the installed system (see sensor data
sheets).
2) Set SW1 position 1 OFF to select Proportional Band control mode
3) Set SW1 position 5 ON to select Proportional Band Commissioning mode
) Set SW1 position 6 OFF to connect Sensor 1 set-points to the controller Fan Speed outputs. NTC1 Red
LED pulses.
5) Connect a Voltmeter to Fan 1 Speed Control PWM Output, J2 pin 3.
6) Adjust R1 for a voltmeter reading equal to the Sensor 1 Bottom of proportional control band voltage.
7) Move the Voltmeter to Fan 2 Speed Control PWM Output, J2 pin 6.
8) Adjust R2 for a voltmeter reading equal to the Sensor 1 Top of proportional control band voltage.
9) If Sensor 2 is not in use, set R3 and R to minimum and omit the next five steps (go to step 15).
10) Set SW1 position 6 ON to connect Sensor 2 set-points to the controller Fan Speed outputs. NTC2 Red
LED pulses.
11) Connect a Voltmeter to Fan 1 Speed Control PWM Output, J2 pin 3.
12) Adjust R3 for a voltmeter reading equal to the Sensor 2 Bottom of proportional control band voltage.
13) Move the Voltmeter to Fan 2 Speed Control PWM Output, J2 pin 6.
1 ) Adjust R for a voltmeter reading equal to the Sensor 2 Top of proportional control band voltage.
15) Commissioning complete - set SW1 position 5 OFF to select Proportional Band normal operation. Set
SW1 position 6 for required SL1 Select Input operation, see table above.
Alternative Commissioning Procedure for Proportional Band set-points:
For this method the voltage at each Variable Resistor Test point is monitored, instead of at the Fan Speed
Outputs.
1) Set SW1 for Proportional Band control mode and Normal Operation (not commissioning mode)
2) Determine the Proportional Band set-point voltages required for the installed system (see sensor data
sheets).
3) Adjust R1 to R4 for the required set-points, monitoring the R1-R4 test point voltages with the voltmeter.
The test point voltage is scaled 0-3.3V instead of 0-10V, so the indicated voltage must be multiplied by 3
to determine the true 0-10V set-point value. The test point location is shown in “PCB Component
Location” below.
Local / Remote 0-10V control mode (including BMS linear control
Set R2 fully clockwise.
Set R1, R3 and R4 fully anti-clockwise.
Set rotary Switch S2 to minimum required fan speed, see table below.
Set rotary switch S3 to maximum required fan speed, see table below.
Connect the Local / Remote / BMS 0-10V control to “0-10V Input, Sensor One“ (J3 pin 3) and “0V“ (J3 pin 6).
The external signal 0-10V signal will then control the fan speed over the 0-10V fan speed control voltage range.
For local manual control an ebm-papst RM-ECv is recommended.

Operating and Maintenance Instructions
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CN1090
Set the Proportional Band Control Fan Minimum and Maximum speeds:
Adjust Rotary DIP Switch S2 to set the fan Minimum speed control voltage.
Adjust Rotary DIP Switch S3 to set the fan Maximum speed control voltage.
See table below
Rotary DIP
Switch
Position
Fan Speed
Voltage
0
0
1
2.0
2
2.6
3
3.1
4
3.7
5
4.2
6
4.8
7
5.3
8
5.9
9
6.4
A
7.0
B
7.5
C
8.1
D
8.6
E
9.2
F
10
.0
To invert Speed Control Output (Heating Profile), make S2 setting higher than S3 setting, set S2 to the maximum
speed and S3 to the minimum speed.

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CN1090
Constant Pressure Control, Operation
For use with ebm-papst EC products with 0-10V control input in HVAC constant pressure systems. Can also be
used with a pressure tapped inlet ring to provide a constant air volume system
The controller uses an external pressure sensor. The controller is suitable for use with the DS85 Series
Differential Pressure Sensor, or compatible 0-10V output pressure sensor.
The user should select a pressure sensor which covers the pressure range required (0-500Pa is typical).
The controller uses a PID control program to vary the fan speed as required to maintain the pressure at the set
value.
The pressure set-point(s) are set by rotary DIP switch(es) or by a second 0-10V input which allows the Set-point
to be adjusted by an external Potentiometer or 0-10V BMS signal. Selection between the Set-points is by means
of Switched Live or Volt Free select inputs, see table below.
The maximum fan speed can be limited if desired, see below.
Constant Pressure Control, Commissioning
Low / Single Pressure Set-point (Default setting if SL1 and Volt Free Select Inputs not connected
Refer to the datasheet for the pressure sensor used, to determine the sensor output voltage at the required
pressure set-point, then adjust rotary switch S2 to select the value closest to the required point, see table below.
High / Second Pressure Set-point, if used (See table for select input use
Refer to the datasheet for the pressure sensor used, to determine the sensor output voltage at the required
pressure set-point, then adjust rotary switch S3 to select the value closest to the required point, see table below.
BMS / External Potentiometer Set-point, if used (See table for select input use
If selected, the Set-point voltage will be the voltage present on 0-10V Input 2 (min/max not limited by S2/S3).
For local manual control an ebm-papst RM-ECv is recommended. This can provide min/max limits if required.
Set the Maximum Fan Speed:
Set the Maximum Fan Speed control voltage using variable resistor R2. Normally the setting will be fully
clockwise to allow full fan speed. If reduced maximum fan speed is required, adjust R2 for the required maximum
fan speed control voltage which will be three times the voltage measured on test point R2, see “PCB Component
Location” below.
Note: There is no minimum fan speed setting for Constant Pressure operation.
Constant Pressure Control PID Program Response Speed
Set R1 to mid position and monitor the operation of the system.
If the fan speed repeatedly overshoots (hunts), adjust R1 anti-clockwise.
If the fan speed is too slow to vary in response to changes in airflow demand, adjust R1 clockwise.
Constant Volume Operation (single fan operation only
By measuring the difference between the ambient inlet pressure and the pressure at a fan inlet ring, it is possible
to calculate air flow volume. If the pressure difference is kept constant, a constant volume system is established.
Inlet Rings: A special inlet ring is required which has hose connections to measure the pressure inside the inlet
ring. They also have a known K-factor, a constant relative to the airflow through the inlet ring, which is needed to
calculate the air volume. Contact ebm-papst for further information.

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CN1090
Pressure Set-point
Select Inputs
FAN STOP
Constant Pressure
Set
-
point
Low / Single
Pressure
Set-point
(S2
External
Pressure
Set-point
(0-10V Input 2
High Pressure
Set-point
(S3
SL2, Switched
Live Input 2
Stop/Run
(J1 pin 2
Open
-
Linked to
230VAC
Linked to
230VAC
Linked to
230VAC
Volt Free Stop/Run
(J1 pin 11
-
Open
Linked to 0V
Linked to 0V
Linked to 0V
SL1, Switched
Live Input 1
(J1 pin 1
-
-
Open
-
Linked to
230VAC,
and
DIP SW 6
OFF
-
Linked to
230VAC,
and
DIP SW 6
ON
Volt Free Select
Input 1
(J2 pin 9
-
-
Open
Linked
to 0V
-
-
-
Volt Free Select
Input 2
(J2 pin 13
-
-
Open
Open
Open
Linked
to 0V
-
In the above table “-” indicates “Input state ignored”
DIP Switch 1
Position
Constant Pressure
Control
operation
OFF
ON
5
Normal (
Cooling
Profile)
Invert Speed Control Output (
Heating
Profile)
6
SL1 selects 0
-
10V set
-
point
SL1 selects Rotary Switch S3 set
-
point
Constant P
ressure Control Set
-
points
Rotary DIP Switch
S2
Low Pressure Set
-
point
0
-
10V Input 2
(J3 pin 5
External Pressure Set
-
point
Rotary DIP Switch
S3
High Pressure Set
-
point
Variable
Resistor
Constant Pressure Control
R1
PID Gain (response speed)
R2
Fa
n Maximum Speed
R3
(reserved)
R4
(reserved)

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CN1090
Constant Pressure Control, Low and High Set-points:
Adjust Rotary DIP Switch S2 to set the Low / Single Pressure Set-point voltage.
Adjust Rotary DIP Switch S3 to set the High / Second Pressure Set-point voltage.
See table below
Rotary DIP Switch S2 & S3
Position
Pressure Set
-
point
Voltage
0
0.6
1
1.2
2
1.9
3
2.5
4
3.1
5
3.7
6
4.3
7
5.0
8
5.6
9
6.2
A
6.8
B
7.4
C
8.1
D
8.7
E
9.3
F
10.0

Operating and Maintenance Instructions
210-OMI13277_Iss1.doc ORIGINAL INSTRUCTIONS Page 12 of 15
ebm-papst UK Ltd, 2012 Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: [phone] Fax: [phone]
e-mail [email protected]bmpapst.com
CN1090
Controller Operation, General: Run Enable Inputs, LED’s, Relays, Power-up Check
Fan Run Control:
Run Enable: Fans will not run unless both run enable signals (Switched Live and Volt Free) are active. LED “En”
will be illuminated if Run enabled, LED will flash mostly off if not. Unit is shipped with both enables linked.
Fan Monitor:
“FAN1” and “FAN2” LEDS, Green LED = Fan Running at 20% speed or above, Red LED = Fan Alarm
Alarm Relay:
Alarm Relay output: Contacts closed = No Alarm, Contacts Open = Fan Alarm or Power Fail.
Fan Run Relay:
Fan Run Relay output: Contacts closed = Fan Running at 20% speed or above, Contacts Open = Not Running.
Fan Maximum Speed Relay (Change-over contacts):
Fan Maximum Speed Relay: Relay Energised = fan below maximum speed setting, Relay De-energised = fan at
maximum speed setting (may indicate Filter Block on a filtered system).
Power-up Check
At power-up all LED’s will illuminate and Relays energise for a few seconds. The fan run will be checked unless
“Fan Stop” is selected.
Maintenance and Servicing
The PCB has no replaceable parts, if a fault develops return the PCB to the manufacturer.
Use of ebm-papst RM-ECv Controller for local manual control
The ebm-papst RM-ECv Controller can be used to provide a 0-10V manually adjustable control voltage,
when supplied from the CN1090 controller “24VDC Unregulated Output, 25mA maximum, sensor supply”.
This is achieved by adjusting the RM-ECv “High” trimmer to give an RM-ECv output of 10V when the main
potentiometer is set fully Clockwise, and adjusting the RM-ECv “Low” trimmer to give an RM-ECv output of 0V
when the main potentiometer is set fully Counter-Clockwise. The RM-ECv trimmers can also be adjusted to limit
the control range if required. For details see the RM-ECv Controller instructions 210-OMI11358, available from
the em-papst web site, www.ebmpapst.co.uk/instructions

Operating and Maintenance Instructions
210-OMI13277_Iss1.doc ORIGINAL INSTRUCTIONS Page 13 of 15
ebm-papst UK Ltd, 2012 Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: [phone] Fax: [phone]
e-mail [email protected]bmpapst.com
CN1090
Terminal Block Use
The terminal blocks fitted are operated as follows:
Insert a 2.5mm or 3mm flat blade screwdriver fully into the upper hole as shown, to open the terminal wire entry.
Insert the wire into the lower hole then remove the screwdriver to leave the wire clamped in the terminal.
Alternatively, open the wire entry by inserting the screwdriver fully from the opposite side of the connector as
shown
Insert the wire into the lower hole then remove the screwdriver to leave the wire clamped in the terminal.
Check wire clamp has moved clear to
allow wire entry

Operating and Maintenance Instructions
210-OMI13277_Iss1.doc ORIGINAL INSTRUCTIONS Page 14 of 15
ebm-papst UK Ltd, 2012 Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: [phone] Fax: [phone]
e-mail [email protected]bmpapst.com
CN1090
PCB Component Location and Live / SELV Circuit
Key PCB components are shown below
J1 Pin1 High Speed Run Enabled S1 S2 S3
LED “B” LED “En”
Live Circuit SELV Circuit
R1 R2 R3 R4 NTC1 NTC2
LED LED
R1 R2 R3 R4 Proportional Band
TEST TEST TEST TEST Commissioning
POINT POINT POINT POINT Fan1 Run Fan2 Run J3 Pin1
LED LED
Fan1 Alarm Fan2 Alarm J2 Pin1
LED LED
Rotary DIP Switch position numbering

Operating and Maintenance Instructions
210-OMI13277_Iss1.doc ORIGINAL INSTRUCTIONS Page 15 of 15
ebm-papst UK Ltd, 2012 Chelmsford Business Park Chelmsford Essex CM2 5EZ
Telephone: [phone] Fax: [phone]
e-mail [email protected]bmpapst.com
CN1090
Declaration of Conformity
13/02/2013 15:08:58