Data sheet NovoCon® S, M, L and XL Digital actuators
Description
NovoCon® S
NovoCon® S is a high accuracy multi-functional
field bus actuator, specifically designed for use
in combination with the Pressure Independent
Control Valve type AB-QM in sizes from DN 10-32.
The flow is modulated by the AB-QM pressure
independent control valve to avoid overflow and
reduced boiler and/or chiller efficiency.
The actuator with AB-QM is used to control water
supply to fan coil units, chilled beams, induction
units, small re-heaters, re-coolers, AHU’s and other
terminal units for zone control, in which heating/
chilled water is the controlled medium. Due to its
accuracy, remote functionality and flow indication
features, this product facilitates an accelerated
commissioning process, allows easy maintenance,
improves indoor comfort, increases energy savings
and allows for fair cost allocation of heat/cool
energy.
The high position accuracy of the actuator,
together with the pressure independent and linear
characteristic of the AB-QM valve, allow NovoCon®
S to be used as a flow indicator.
Setup of the actuator and valve parameters are
made via fieldbus. Control is achieved via field bus
or via analog inputs to NovoCon® S.
Typical applications are:
• Radiant ceiling panels, supplied by 4 pipes
(Heating supply and return and cooling supply
and return).
• Fan coil units, with single coils supplied by 4
pipes (Heating supply and return and cooling
supply and return).
General features:
• Remote commissioning/Pre-set/Flush features
• Flow, power emission and energy indication
• High position resolution and accuracy
• Energy management algorithms
• 4/2-pipe changeover applications
• I/O applications
• LED bar displaying status and alarms
• No tools required for mounting
• Maintenance-free lifetime
• Self-positioning process
• Low-noise operation
• Plug-in halogen free cables
• Auto MAC addressing for BACnet
• Auto baud rate detection
• Intrinsic alarm reporting for BACnet
• Valve blockage alarm
• Broken wire detection on analog control and
ground signal
• Choice of BACnet MS/TP or Modbus RTU in the
same product
• Mis-wiring protection on any wire up to 30 V
Combined with the Actuator NovoCon®
ChangeOver6, NovoCon® S offers a unique solution
in controlling both the AB-QM valve and a 6-port
motorised ball valve that performs a diverting
function between two water circuits in 4-pipe
changeover systems.
This diverting function, primarily used for radiant
panels, also allows the cooling and heating capacity
of a fan coil unit to be increased for the same
compact size compared to a double coil model
where the heating and cooling water circuits each
have their own coil.
The 6-port diverting valve and actuator work in
combination with an AB-QM PIBCV valve and
NovoCon® S bus actuator. The AB-QM balances the
flow and the NovoCon® S bus actuator controls
the flow. NovoCon® S also controls the 6-port
diverting valve actuator which switches between
heating and cooling. This unique functionality is
characterized by the following:
• There is only one single field bus and power
supply connection cable to the NovoCon® S
actuator. This powers both the NovoCon® S
and controls the 6-port actuator. Furthermore,
there is feedback from the 6-port actuator to
NovoCon® S.
• The NovoCon® S actuator automatically faultdetects, by means of comparing 0-10V control
& feedback signals, if the 6-port actuator is in
manual operation mode, removed from the
valve or if the 6-port valve is blocked.
• The NovoCon® S actuator has two Design Flow
Rate pre-settings: one for heating and another
for cooling.
• The NovoCon® S actuator indicates power
emission and logs energy consumption
for heating and cooling energy based on
flow, supply and return pipe temperature
measurement.
• While in maintenance mode, the 6-port actuator
is able to fully close the valve and prevent any
leakage, thereby saving on stop valves.
• Logic contained within the NovoCon® S actuator,
ensures that only one actuator in each pair
(NovoCon® S and 6-port valve actuator) drives.
This ensures that 2 actuators in the pair never
drive at the same time. This reduces voltage
booster demands in daisy chains.
• The NovoCon® S actuator detects if the 6-port
actuator cable is disconnected. If this is the case
an alarm is initiated.
Features CO6:
• NovoCon® S + ChangeOver6 actuator represents
only ONE device on the fieldbus network
needing no physical I/O
Data sheet NovoCon® S, M, L and XL Digital actuators
Red
AI:2 / 33220
Read / writeable via fieldbus
Read / writeable via fieldbus
AI:2 / 33220
Description (continued)
NovoCon® S (continued)
NovoCon® M
Features Energy:
•
Supply and return temperature measurement
• Power emission indication reading
• Energy management functionality for both
heating and cooling e.g. minimum delta T
management
• Energy logging of both heating and cooling
Features I/O:
• Connect to other devices and present them
on the field bus, e.g. room thermostat,
window contact, CO2 sensor, humidity
sensors, fan control, 0-10V actuator etc.
• Select temperature units, Ohms or use as
BACnet object / Modbus register
Black
Blue
Grey
White
0-20mA
AI:0 / 33216
0-10V
AO:0 / 33286
Yellow
Orange
NovoCon® M is a high accuracy multi-functional
fieldbus actuator, specifically designed for use
in combination with the Pressure Independent
Control Valve type AB-QM NovoCon® in sizes
from DN 40-100 used in air handling units AHU,
chillers and distribution station applications.
The high position accuracy of the actuator,
together with the pressure independent and
linear characteristic of the AB-QM valve, allow
NovoCon® M to be used as a flow indicator.
Setup of the actuator and valve parameters
are made via fieldbus. Control is achieved via
fieldbus or via analog inputs to NovoCon® M.
potential free contacts. Closed circuit <900Ω,
open circuit 100kΩ.
• Available connections: 1 x analog output (V),
1 x analog input (V/mA) and 2 x resistance
based inputs (°C/°F/Ohms)
BACnet object / Modbus register
0-10V
0-10V
0-10V
AI:1 / 33218
10kΩ
10kΩ
0-20mA
AI:0 / 33216
0-10V
AO:0 / 33286
AI:1 / 33218
General features:
• Remote commissioning/Pre-set/Flush features
• Flow, power emission and energy indication
• High position resolution and accuracy
• Energy management algorithms
• Inputs/Outputs
- 3x Resistance Inputs (Pt1000, PT500, PT100,
NTC 10k Type 2 & 3)
- 1x Analog Input (0-10V or 0/4-20mA),
- 1x Analog Output (0-10V)
• LED displaying status and alarms
• No tools required for mounting on valve
• Maintenance-free lifetime
• Low-noise operation
• Auto MAC addressing for BACnet
• Auto baud rate detection
• Intrinsic alarm reporting for BACnet
• Valve blockage alarm
• Choice of BACnet MS/TP or Modbus RTU in
the same product
• Mis-wiring protection on any wire up to 30 V
NovoCon® L, XLNovoCon® L/XL is a high accuracy multi-
functional fieldbus actuator, specifically
designed for use in combination with the
Pressure Independent Control Valve type AB-QM
in sizes from DN 125-250 used in air handling
units AHU, chillers and distribution station
applications.
The high position accuracy of the actuator,
together with the pressure independent and
linear characteristic of the AB-QM valve, allow
NovoCon® L/XL to be used as a flow indicator.
Setup of the actuator and valve parameters
are made via fieldbus. Control is achieved via
fieldbus or via analog inputs to NovoCon® L/XL.
General features:
• Remote commissioning/Pre-set/Flush features
• Flow, power emission and energy indication
• High position resolution and accuracy
• Energy management algorithms
• Inputs/Outputs
- 3x Resistance Inputs (Pt1000, PT500, PT100,
NTC 10k Type 2 & 3)
- 1x Analog Input (0-10V or 0/4-20mA),
- 1x Analog Output (0-10V)
• LED displaying status and alarms
• Maintenance-free lifetime
• Low-noise operation
• Auto MAC addressing for BACnet
• Auto baud rate detection
• Intrinsic alarm reporting for BACnet
• Valve blockage alarm
• Choice of BACnet MS/TP or Modbus RTU in
the same product
Note! Cables are not i ncluded with actuator and m ust be ordered separately.
Cable NovoCon®
Energy
Cable NovoCon®
Energy
Cable NovoCon®
Temperature I/O
Note! If se parate Pt1000 temperature sensors a re needed, Danfoss has an ar ray of Pt100 0 sensors that can be used with Novo Con® S.
See Danfoss P t1000 sensor s ESMT, ESM-10, ESM-11, ESMB-12, ESMC, ESMU and code n o. 187F3418.
1.5 mPlug-in cable with Pt1000 surface temperature sensorsPVC003Z8610
1.5 m
1 m / Temp.
sensor 1.5m
0.5 mactuator / actuatorHalogen free003Z8609
1.5 mactuator / actuatorHalogen free003Z8603
5 mactuator / actuatorHalogen free003Z8604
10 mactuator / actuatorHalogen free003Z8605
Plug-in cable with Pt1000 Immersed /universal
temperature sensors (Ø 5,8m m)
Plug-in cable with Pt1000 surface temperature sensors
and free wires for input, output and power
PVC003Z8611
Halogen free.
Sensor cables PVC
003Z8613
ChangeOver6 actuators
Actuator NovoCon ChangeOver
Actuator NovoCon ChangeOver6 Energy
Actuator NovoCon ChangeOver6 Flexible
6
1 mPlug-inHalogen free003Z 8520
1 m
Temp. sensor 1.5 m
1.5 m
Plug-in incl. Pt1000 sur face
temperature sensors
Actuator / open wiresHalogen free003Z8522
Halogen free
Sensor cables PVC
003 Z8521
Typ eDN Fire load class Code No.
ChangeOver6 insulation
According to D/N 4102
Typ eDN
ChangeOver6 valve
15B2003Z3159
k
VS
Connection
(m3/h)
152.4Rp ½003 Z3150
204.0Rp ¾0 03Z3151
Code No.
NovoCon® Configuration Tool
Typ e
NovoCon® Configuration Tool cable5 m
Length
ConnectionsCable materialCode No.
USB /
actuator
Software available on www.novocon.com
Temperature sensors
Typ e
Immersed Pt 1000 / f 5.2 mm / 1.5 m cable,
pair, MID
Code No.
187F3 418
Service kit - combination with old AB-QM
Typ eCode No.
NovoCon® adapter for AB-QM, DN 10-32 (5 pcs.) 003Z0239
Accessories (Cable NovoCon® Energy)
Typ eDesignationCode No.
Immersion brass pockets,
40 mm, Ø 6.0 pair.
Pockets for Cable
NovoCon® Energy
(003Z8611)
Halogen free. USB Conver ter, PVC003Z8620
For pipes DN25/32.
Immersion brasspockets, 35 mm, Ø 5.2
pair, MID. For pipes
DN15 -32
Data sheet NovoCon® S, M, L and XL Digital actuators
Installation and orientationNovoCon® S can be mounted in any position.
NovoCon® S
However, mounting orientation affects the IP
classification. Using NovoCon® S upside down in
cooling applications is not recommend due to
the risk condensation brings. See illustration.
Note!
IP classification is only valid when cable or plugs are
present in all connections.
IP 54
IP 54
No presetting should be done
on AB-QM valves. Valve must
be set to full open
(10 = AB-QM 4.0, 100% =
AB-QM)
NovoCon® M
DN 15 - 32
DN 15, 20
0 - 10
No tool is required to mount the actuator on the
valve. Installation of the valve with the actuator
is allowed in the horizontal position or upwards.
Installation downwards is not allowed.
The actuator must not be installed in an
explosive atmosphere, at ambient temperature
lower than 0 °C or at ambient temperature higher
than 50 °C. It must not be subject to steam jets,
water jets or dripping liquid.
Note: The actuator may be rotated up to 360°
with respect to the valve stem by loosening the
retaining fixture. Once the actuator is in place,
retighten the retaining fixture.
Note: The cable and cable gland/grommet used,
must not compromise the actuator’s IP rating.
There must be no strain on the connectors.
The rubber cable grommet delivered from
factory do not compromise the IP rating but do
not provide full strain relief according to the LVD
directive.
Please observe local rules and regulations.
Data sheet NovoCon® S, M, L and XL Digital actuators
Installation (continued)
NovoCon® L, XL
DN 125 - 250
NO presetting!
–
+
100 %
Mechanical
Please check the allowed installation positions
for the valve and actuator. The actuator can be
installed in all positions (see below).
Installation of the actuator assembly is certified
for placement within the plenum airspace.
Use a M8/SW13 key (not supplied) to fit the
actuator to the valve body. Allow for necessary
clearance for maintenance purposes. To link
valve and actuator stems use a 4mm Allen
key (not supplied). The actuator has position
indication rings which should be pushed
together before el. connection; after calibration
cycle they indicate end positions of the stroke.
NovoCon® LNovoCon® XL
Electrical connection
Electrical connections can be accessed by
removing the service cover.
NovoCon® L/XL
Four cable entries are provided
- (1) M16x1.5
- (2) M20x1.5
- (1) 1/2”
Note in order to maintain the enclosure’s rating
appropriate electrical conduit connectors must
be installed.
Please observe local rules and regulations.
Dip switches
DIP Switch Settings
NovoCon® S, L, XL
The DIP switches located under the housing cover are for manual addressing.
The jumper next to the connectors is used for terminal resistor setting.
BACnet: Auto MAC addressing is default. For manual MAC addressing, use DIP Switches.
Modbus: Manual MAC addressing is default. Automatic addressing is not available for Modbus.
However, if an address has been assigned in BACnet before switching to Modbus, the
address will also be used in Modbus if the DIP switches are left in the default positions.
DIP SwitchConfiguration nameOFF state (default)ON state
1 2 3 4 5 6 7 8 9 10
1.
1 2 3 4 5 6 7 8 9 10
2.
1 2 3 4 5 6 7 8 9 10
3.
1 2 3 4 5 6 7 8 9 10
4.
1 2 3 4 5 6 7 8 9 10
5.
1 2 3 4 5 6 7 8 9 10
6.
1 2 3 4 5 6 7 8 9 10
7.
1 2 3 4 5 6 7 8 9 10
8.
1 2 3 4 5 6 7 8 9 10
9.
1 2 3 4 5 6 7 8 9 10
10.
The actuato r possesses a resistor, DIP switch no. 8, th at can be activated in the last ac tuator on the bus for correct te rmination of the bus.
When the protocol is ch anged on DIP switch no. 10, a power c ycle is required to make the actu ator adopt the newly selec ted protocol.
Data sheet NovoCon® S, M, L and XL Digital actuators
DIP Switch Settings
(continued)
NovoCon® M
BACnet: Auto MAC addressing is default. For manual MAC addressing, use DIP switches
Modbus: Manual MAC addressing is default. Automatic addressing is not available for Modbus.
However, if an address has been assigned in BACnet before switching to Modbus, the
address will also be used in Modbus if the DIP switches are left in the default positions.
DIP SwitchConfiguration nameOFF state (default)O N state
1 2 3 4 5 6 7 8R
1.
1 2 3 4 5 6 7 8R
2.
1 2 3 4 5 6 7 8R
3.
1 2 3 4 5 6 7 8R
4.
1 2 3 4 5 6 7 8R
5.
1 2 3 4 5 6 7 8R
6.
1 2 3 4 5 6 7 8R
7.
1 2 3 4 5 6 7 8R
8.
BACnet addr ess / Modbus
ON
OFF
BACnet addr ess / Modbus
ON
OFF
BACnet addr ess / Modbus
ON
OFF
BACnet addr ess / Modbus
ON
OFF
BACnet addr ess / Modbus
ON
OFF
BACnet addr ess / Modbus
ON
OFF
BACnet addr ess / Modbus
ON
OFF
ON
OFF
unit ID bit 0
unit ID bit 1
unit ID bit 2
unit ID bit 3
unit ID bit 4
unit ID bit 5
unit ID bit 6
-BACn et MS/TP Modbus RT U
Logic ‘0’Logic ‘1’
Logic ‘0’Logic ‘1’
Logic ‘0’Logic ‘1’
Logic ‘0’Logic ‘1’
Logic ‘0’Logic ‘1’
Logic ‘0’Logic ‘1’
Logic ‘0’Logic ‘1’
DIP Switch Settings
- Manual Addressing
1 2 3 4 5 6 7 8R
R.
ON
Termination r esistor (120Ω)No termination
OFF
Termination r esistor enable d
The actuator p ossesses a resistor, located betwe en the connectors, DIP s witch no. 9 R on/off, that can be activate d in the last actuator
on the bus for corre ct termination of the bus .
When the protocol is ch anged on DIP switch no. 8, a po wer cycle is required to make th e actuator adopt the newl y selected protocol.
BACnet MAC address/Modbus Slave ID is set by DIP switch 1 to 7.
0 = OFF, 1 = ON
Data sheet NovoCon® S, M, L and XL Digital actuators
Wiring
NovoCon® S
The wiring of BACnet MS/TP or Modbus RTU
(RS485) must be carried out in accordance with
applicable standard ANSI/TIA/EIA-485-A-1998.
Digital port
Galvanic separation shall be provided for
segments crossing buildings.
Common ground shall be used for all devices
Multifunctional
port
on the same network inclusive router,
gateways etc.
Digital port
All bus connections in the cables are made with
twisted wires.
The cable type used for NovoCon® analog, digital and I/O cables is AWG22/0.32mm2.
If other cables are used to extend the length, always use twisted pair wire for bus signal and include
ground for the bus signal. The recommended cable type is AWG22/0.32 mm2. If used for longer
distances please use a AWG20/0.5mm2 or AWG18/0.75mm2 cable. The cable’s impedance characteristic
shall be between 100-130Ω. The capacitance between conductors shall be less than 100 pf per meter.
The length of the cables influence on the communication speed. Longer cable lengths should result in
lower baud rates. The total maximum cable length allowed per network is 1200m.
Use a minimum 20 cm distance between 110V/230V/400V power line cables and bus cables.
NovoCon® S has mis-wiring protection on up to 30 V AC/DC on all wires, but be aware that if 30V AC
are connected to the Analog input, the external power supply will see this as a short circuit and blow
the fuse in the external power supply.
NovoCon® digital daisy chain cable
Black O-ring
Black O-ring
The digital daisy chain cable is used to connect power and BACnet/Modbus between two
NovoCon® S devices.
NovoCon® digital cable
Red:Power
White O-ring
Common ground for power
Black:
and bus signal wire
Green: ‘+’ non-inverting signal wire
Green/
‘-‘ inverting signal wire
White:
The digital cable is used to connect NovoCon® to other BACnet/Modbus devices. It is also used to
connect NovoCon to a longer length of power/communication cable other than standard sales codes.
NovoCon® analog cable
Red O-ring
The analog cable is used to connect power and analog control signal.
The analog cable can also be used as a voltage booster for NovoCon® S on the network.
Data sheet NovoCon® S, M, L and XL Digital actuators
Wiring (continued)
NovoCon® S(continued)
Cable NovoCon® Energy with universal Pt1000 temperature sensor
NovoCon® Energy cable - Pt1000 immersed sensors
Green O-ring
Cable NovoCon® I/O
Red Power 24V (in/out)
Black
Blue
Power ground (in/out)
Ground T1, T2, V/mA input & V output signal
Grey V/mA input signal
Yellow O-ring
White V output signal
Yellow T1 or resistance input
Orange T2 or resistance input
The red and black wires can be used to boost the power on the line. They may also be used to power
external devices, a separate calculation must be made for available power.
To avoid electrical short-circuiting, ensure that loose cable-ends have been connected or
isolated before inserting the plug-in connector to the NovoCon® S actuator.
Cable NovoCon® Temperature I/O
Red Power 24V (in/out)
Black
Power ground (in/out)
Blue
Ground T1, T2, V/mA input & V output signal
Grey V/mA input signal
Blue O-ring
White V output signal
T1
T2
Wiring considerations
NovoCon® S
The important factors here are:
- Common ground
- 24VDC power supply is recommended
- In case more 24VAC power supplies are used
always separate the 24VAC power supplies if
different types of power supplies are used and /
or different phases are used.
Wiring with DC power supply: (recommended solution)
Digital application – 24V DC – PSU with power sharing capability, both on the same or different phases.
230/110V AC
L1 L2 L3
0
GND
24V DC
Ground
24V DC
PSU
DDC
24V DC
Ground
24V DC
PSU
Cable NovoCon® Digital
Bus
Room 1
Room
controller
Thermostat
Daisy chain cables between NovoCon® S
Room 2
Room
controller
Thermostat
X X
Cable NovoCon® Analog
Turn DIP switch
no. 8 ON for bus
termination of the
last unit on the bus.
Data sheet NovoCon® S, M, L and XL Digital actuators
Wiring with DC or AC power supply:
230/110V AC
L1 L2 L3
0
230/110V AC
L1 L2 L3
0
GND
GND
24V DC / AC
Ground
24V DC / AC
PSU
24V DC / AC
Ground
24V DC / AC
PSU
Room 1Room 2
Bus
DDC
Cable NovoCon®
Digital
Room
controller
Room 1Room 2
Bus
DDC
Cable NovoCon® Digital
Room
controller
Digital application - One transformer
Thermostat
controller
Daisy chain cables between NovoCon® S
Analog Control Application - One transformer
Thermostat
Room
controller
XXX
Cable NovoCon® Analog
Thermostat
Cable NovoCon® Analog
Daisy chain cables between
NovoCon® S
Room
Room 3
Thermostat
XX
Cable NovoCon® Analog
Room
controller
XX
Thermostat
Turn DIP switch
no. 8 ON for bus
termination of the
last unit on the bus.
Connect Power
ground and
Analog input
ground on the
Controller.
24V power
can
also be
connected to
NovoCon® S
through the
analog cable,
but is not
required.
Turn DIP switch no. 8 ON for bus termination of the last unit on the bus.
Wiring with AC power supplies:
230/110V AC
L1 L2 L3
The power b oosters must be p rotected against over load, otherwise the power booster may be damag e if one of the othe r power boosters in the network is
disconnected.
GND
0
If the NovoCon® S network is supplied with two or more AC power boosters, c aution must be observe d when disconne cting one of the
transformers from the high voltage power line. A s the NovoCons are co nnected in a dai sy chain, there may be high voltage on the primary s ide
of the disconne cted power supp ly.
24V AC
PSU
24V AC
24V AC
PSU
24V AC
Ground
DDC
Ground
Digital application - Identical transformers, same phase
Room 1
Bus
Room
controller
Cable NovoCon®
Digital
Disconnect always both the primary and secondary side of the transformer.
Thermostat
Daisy chain cables between NovoCon® S
Room 2
Room
controller
Thermostat
Turn DIP switch
no. 8 ON for bus
termination of the
last unit on the bus.
XX
Cable NovoCon® Analog
Wires that ends in an "X" must be properly terminated.
Data sheet NovoCon® S, M, L and XL Digital actuators
Wiring (continued)
NovoCon® M
The wiring of BACnet MS/TP or Modbus RTU (RS485) must be carried out in accordance with applicable
standard ANSI/TIA/EIA-485-A-1998. Galvanic separation shall be provided for segments crossing
buildings. The bus connection ‘A+’ is the non-inverting signal and ‘B-‘ is the inverting signal wire.
Common ground shall be used for all devices on the same network including routers gateways etc.
The recommended cable type is AWG22/0.32 mm2 twisted pair. If used for longer distances, please use a
AWG20/0.5mm2 or AWG18/0.75 mm2 cable. The cable’s impedance characteristic shall be between
100-130 Ω. The capacitance between conductors shall be less than 100 pf per meter. The length of the
cables influence the communication speed. Longer cable lengths should result in lower baud rates. The
total maximum cable length allowed per network is 1200 m.
Use a minimum 20 cm separation distance between 110V/230V/400V power line cables and bus
cables. NovoCon® M has mis-wiring protection up to 30V AC/DC on all wires but be aware that if 30V
AC are connected to the Analog input, the external power supply will see this as a short circuit and
blow the fuse in the external power supply.
+24V
0V
A+
B−
GND
T3
R on R off
T2
T1
GND
GND
AO
AI
24V AC/DC
BACnet MS/TP or
Modbus RTU
Temperature
sensor 3
Temperature
sensor 1
Analog
output
Temperature
sensor 2
Analog input
NovoCon® L, XL
GND is common for a ll signals
Danfoss recommends that NovoCon® M should be used on its own sub-network for optimal
performance.
General requirements and recommendations:
• Use the termination resistor (between the 2 connectors) at the end of each daisy chain.
• Generally, one power supply is preferred.
• If two power supplies are used, they must have the same polarity and the same common ground.
• A common ground must be used for all devices on the same sub-network, including routers and
gateways.
• Galvanic separation shall be provided for segments crossing buildings.
• Total maximum sub-network cable length is 1200m.
The wiring of BACnet MS/TP or Modbus RTU (RS485) must be carried out in accordance with applicable
standard ANSI/TIA/EIA-485-A-1998. The bus connection ‘A+’ is the non-inverting signal and ‘B-‘ is the
inverting signal wire.
NovoCon® L/XL has a galvanic separated power supply, but common ground is recommended to use
for all devices on the same network including routers gateways etc.
The cable’s impedance characteristic for communication shall be between 100-130 Ω. The capacitance
between conductors shall be less than 100 pf per meter. The length of the cables influence the
communication speed. Longer cable lengths should result in lower baud rates. The total maximum
cable length allowed per network is 1200 m.
Use a minimum 20 cm separation distance between 110V/230V/400V power line cables and bus
cables. NovoCon® L/XL has mis-wiring protection up to 30V ac/dc on all wires but be aware that if 30V
ac are connected to the Analog input, the external power supply will see this as a short circuit and
blow the fuse in the external power supply.
Data sheet NovoCon® S, M, L and XL Digital actuators
Wiring (continued)
NovoCon® L, XL (continued)
GND is common for a ll signals
Danfoss recommends that NovoCon® L/XL should be used on its own sub-network for optimal
performance.
General requirements and recommendations:
• Use the termination resistor (DIP switch 8) at the end of each daisy chain.
• Total maximum sub-network cable length is 1200m.
Daisy chain & Power booster
NovoCon® S
T-junctions
T-junction connections (stub lines) are not recommended.
In the event of T-Junction connections being used the following limitations must be adhered to:
- max T-junction cable length 1.5m (shortest standard digital cable)
- total length of Network max 640m (+ 100m stub length)
- max baud rate 76 kb/s 1)
- max number of devices on network 64 1)
- main cable should be standard RS485 bus, twisted pair, min thickness AWG22 / 0.32mm2.
1)
When using less than 32 devices you may attempt to raise the speed to 115 kb/s.
Star topology
Star topology is not according to the RS485 standard and should not be used with NovoCon® S, M
and L/XL.
DC Power supply (recommended)
When daisy chaining with 10m NovoCon® cables
and using a 24V DC power supply, additional
voltage boosters/power supply is needed when
12 NovoCons in series is exceeded. See table
below.
AC Power supply
When daisy chaining with 10m NovoCon® cables
and using a 24V AC power supply, additional
voltage boosters/power supply is needed when
7 NovoCons in series is exceeded. See table below.
Important: The power supply used must be able
to deliver 60% more power than the nominal
rating of NovoCon® S.
Controller and 24 Volt AC or DC Power supply
U=24V
Remember to enable DIP switch 8 for bus termination on the
last NovoCon
® S in the daisy chain
Voltage booster/power supply,
temperature sensors added directly
or through the Cable NovoCon® I/O
Bus communication from the controller
Power supply w ith daisy chain fr om controller
Usage of anal og cable as volta ge booster
NovoCo n® S
If NovoCon® S is used to power external devices, a separate calculation must be made for power booster amount and
location.
max
Daisy chain
1.5m
If the supply voltage to the first device in the daisy chain is lower than 24V AC/DC, or long thin cables
other than NovoCon® cables are used, then the quantity of devices in the daisy chain may have to be
reduced.
The recommended maximum quantities of NovoCon® S are 64 pcs in one daisy chain connection.
If other BACnet devices are added with NovoCon® S in the same daisy chain connection, Danfoss
recommends a maximum of 32 pcs. to ensure sufficient network speed.
Danfoss recommends that NovoCon® S should be used on its own sub-network for optimal
performance.
General requirements and recommendations:
• Use Danfoss daisy chain cable to connect two NovoCon® S devices.
• Use Danfoss digital cable to connect NovoCon® S with another BACnet device.
• The current in cables should not exceed 3Arms at 30°C.
• Use the termination resistor (DIP switch 8) at the end of daisy chain.
• Voltage boosting may be achieved via any port.
• Generally, one power supply is preferred.
• If two power supplies are used, they must have the same polarity and the same common ground.
• A common ground must be used for all devices on the same sub-network, including routers and
gateways.
• Galvanic separation shall be provided for segments crossing buildings.
• Total maximum sub-network cable length is 1200m.