NT10 Series RS485 Modbus RTU Networking LCD Fan Coil

NT10 Series RS485 Modbus RTU
Networking LCD Fan Coil Thermostat
Features
Modern Appearance
Stylish rotary dial and buttons
Large LCD with backlight
Support Modbus RTU protocol
Support standalone operation on RS485
communication failure
Retention of temperature set-point and fanspeed upon power failure
Separate Power Supply Unit provides highcurrent application
Unoccupied mode contact for energy-saving
Window contact for remote on-off control
2-wire on-off, 0-10 VDC and 3-wire floating
models
Dual-output model provides auto cooling/
heating changeover with adjustable deadband or/and manual override
PI Algorithm (modulating models)
Parameter setup manual
Remote temperature sensor capability
Seasonal changeover sensor availability
Optional remote controller
Additional Binary Input
Extendibility to BACnet network with our
BACnet MS/TP Gateway module (BMG-MR)
Selectable Functions
Selectable ºC or ºF temperature display
Field selectable program to retain last
operating event upon power failure
Measured temperature off-set
Selectable P-band and I-time
Selectable Actuator stoke time (3-wire floating model)
Field selectable 1 to 5 K deadband for dualoutput models
Field adjustable high and low set point limit
Field adjustable cooling and heating energy
saving mode set points
Selectable fan action in unoccupied mode
Selectable Auto Fan sequence in heating
mode
Selectable operating mode sequence for dual
-output models
Selectable manual/auto operating sequence
for single output models
Selectable constant display of temperature
E030-1308
General
The NT10 Series RS485 Modbus RTU networking
LCD Fan Coil applies communication technology of
Modbus RTU master/slave protocol to monitor and supervise year around air conditioning units in commercial, industrial and residential Installation. Typical application includes the control of fan coil units, packaged
terminal air conditioners and combination heating and
cooling equipment, as part of the system that consists of
two-way or three-way valve and a multi-speed line voltage fan. The maximum number of NT10 slaves in a
Modbus RTU network is 32.
Optional BACnet MS/TP Gateway module (BMG-MR) is
available for order. It works as an interface to link up
the NT10 thermostats with BACnet MS/TP communication bus. Please refer to the product bulletin of BMGMR BACnet MS/TP Gateway for details.
Ordering
To order the NT10 Series thermostat, contact the nearest Cyrus’ representative. Specify the desired product
code number from model selection guide.
1
Product Overview
NT10 are line voltage Modbus RTU Networking LCD fan coil thermostat with 8 basic models that cover all type
of FCU standalone applications in additional to networking capability. NT10 consists of two units; the Networking Control Unit (NCU) and Power Supply Unit (NPSU). There are models for cooling only, heating only and
heating-cooling fan coil system integrate with 2-wire, 3-wire or 0-10 VDC input valve control. On-board high accuracy NTC sensor allows precision comfort control over occupied space area.
NT10-1
NT12-1
NT10-1F
NT12-1F
NT10-1A
NT10-2
NT10-2F
NT12-2
NT12-2F
NT10-2A
NT10-2AH
consists of NCU11 and NPSU10-1 (220 VAC supply, 220 VAC single 2-wire on-off output)
consists of NCU11 and NPSU12-1 (220 VAC supply, 24 VAC single 2-wire on-off output)
consists of NCU11F and NPSU12-1F (220 VAC supply, 220 VAC single 3-wire floating output)
consist of NCU11F and NPSU12-1F (220 VAC supply, 24 VAC single 3-wire floating output)
consists of NCU11A and NPSU10-1A (220 VAC supply, 0-10 VDC single output)
consists of NCU12 and NPSU10-2 (220 supply, 220 VAC dual 2-wire on-off output)
consists of NCU12F and NPSU1-2F (220 VAC supply, 220 VAC dual 3-wire floating output)
consists of NCU12 and NPSU12-2 (220 VAC, 24 VAC dual 2-wire on-off output)
consists of NCU12F and NPSU12-2F (220 VAC supply, 24 VAC dual 3-wire floating output)
consists of NCU12A and NPSU10-2A (220 VAC, dual 0-10 VDC output)
consists of NCU12AH and NPSU10-2AH (220 VAC, 0-10 VDC cooling and 2-wire on-off heating)
Model NT10-1 & NT12-1
The Model NT10-1 is Modbus RTU networking LCD with
backlight line voltage fan coil thermostat that is designed for
cooling only / heating only fan coil unit with 2-wire linevoltage valve actuator application (NT12-1 provides 24
VAC valve output). Integral with system of Cooling/Heating
-Fan-Off switch that allows users to cutoff power for fan and
the output for valve actuator. Simply pressing the fan
speed button, allows users to select Auto-High-Med-Low
fan speed. All fan outputs by relay that can withstand max.
of 5 Amp (resistive) 2 Amp (Inductive) operating current.
Model NT10-1F & NT12-1F
The Model NT10-1F is Modbus RTU networking LCD with
backlight line voltage fan coil thermostat that is designed for
cooling only / heating only fan coil unit with 3-wire linevoltage valve actuator application (NT12-1F provides 24
VAC valve outputs). Integral with system of Cooling/
Heating-Fan-Off switch that allows users to cutoff power for
fan and the output for valve actuator. Simply pressing the
fan speed button, allows users to select Auto-High-MedLow fan speed. All fan outputs by relay that can withstand
max. of 5 Amp (resistive) 2 Amp (Inductive) operating current.
Model NT10-1A
The Model NT10-1A is Modbus RTU networking LCD with
backlight line voltage fan coil thermostat that is designed for
cooling only / heating only fan coil unit with 0-10 VDC valve
actuator application. Integral with system of Cooling/
Heating-Fan-Off switch that allows users to cutoff power for
fan and the output for valve actuator. Simply pressing the
fan speed button, allows users to select Auto-High-MedLow fan speed. All fan outputs by relay that can withstand
max. of 5 Amp (resistive) 2 Amp (Inductive) operating current.
Model NT10-2 & NT12-2
The Model NT10-2 is Modbus RTU networking LCD with
backlight line voltage fan coil thermostat that is designed for
cooling / heating fan coil unit with 2-wire line-voltage valve
actuator application (NT12-2 provides 24 VAC valve out-
2
Off switch that allows users to cutoff power for fan and the
output for valve actuator. Simply pressing the fan speed
button, allows users to select Auto-High-Med-Low fan
speed. All fan outputs by relay that can withstand max. of 5
Amp (resistive) 2 Amp (Inductive) operating current.
Model NT10-2F and NT12-2F
The Model NT10-2F is Modbus RTU LCD fan coil thermostat that is designed for cooling / heating fan coil unit with 3
-wire line-voltage valve actuators application (NT12-2F provides 24 VAC valve outputs). Integral with system of Cooling-Heating-Auto-Fan-Off switch that allows users to cutoff
power for fan and the output for valve actuator. Simply
pressing the fan speed button, allows users to select AutoHigh-Med-Low fan speed. All fan outputs by relay that can
withstand max. of 5 Amp (resistive) 2 Amp (Inductive) operating current.
Model NT10-2A
The Model NT10-2A is Modbus RTU networking LCD with
backlight line voltage fan coil thermostat that is designed for
cooling / heating fan coil unit with 0-10 VDC valve actuator
application. Integral with system of Cooling-Heating-AutoFan-Off switch that allows users to cutoff power for fan and
the output for valve actuator. Simply pressing the fan
speed button, allows users to select Auto-High-Med-Low
fan speed. All fan outputs by relay that can withstand max.
of 5 Amp (resistive) 2 Amp (Inductive) operating current.
Model NT10-2AH
The Model NT10-2AH is Modbus RTU networking LCD with
backlight line voltage fan coil thermostat that is designed for
cooling / heating fan coil unit with 0-10 VDC cooling valve
actuator and 2-wire on-off heating application. Integral
with system of Cooling-Heating-Auto-Fan-Off switch that
allows users to cutoff power for fan and the output for valve
actuator. Simply pressing the fan speed button, allows
users to select Auto-High-Med-Low fan speed. All fan outputs by relay that can withstand max. of 5 Amp (resistive) 2
Amp (Inductive) operating current.
LCD Segments and Buttons
Operation Notes
Temperature Display
LCD shows measured temperature constantly except when temperature set point adjustment is
being made
Backlight
The backlight will light up for 5 seconds when any button is pressed
Mode of operation
Press the system control key to enter into the desired operating mode:
Cooling-Heating-Auto-Fan Only-Off
Fan speed
Press the fan control key
Temperature Set-point
Increase or decrease temperature set point by rotating the adjustment dial clockwise or counterclockwise. When the dial is rotated, the LCD shows the set point temperature
to change the fan speed mode: High-Med-Low-Auto
Unoccupied Mode (Energy The energy saving mode is activated while “OCU” contact is in closure. In unoccupied mode,
-saving)
the factory temperature set points are 26 oC and 16 oC for cooling and heating respectively.
Fan speed is always set at “low”.
Window Mode
The window mode is activated while “WIN” contact is in closure. In window mode, the FCU is
shut down and locks out the functions of the thermostat.
Parameter setup menu
The thermostat allows authorized service agents to change certain number of operating parameters, please refer to parameter setup manual for details.
Dimensions in mm
Power Supply Unit
Networking Control Unit
Remote Controller
3
Network & Cabling Requirements
To ensure network stability and reliable communications, particularly at high speeds on a BACnet MS/TP or
Modbus RTU network for a number of devices, it is imperative that the following network and cabling
requirements are adhered to:
Item
Description
Cabling
For BACnet MS/TP and Modbus RTU networks, it is recommended to use networking cabling that matches the following specifications:
• Balanced 100 to 120 ohms nominal impedance, 22 or 24 AWG Twisted Shielded Pair
(TSP) Cable
• Nominal capacitance of 52 pF/m or lower
• Nominal velocity of propagation of 66% or higher
Topology
Ensure the MS/TP or Modbus RTU network cable is installed as a daisy chain from one
device to the next.
Maximum Nodes
The maximum number of devices per MS/TP or Modbus RTU network without any repeaters is 32.
Terminator
A terminator of 120-ohm impedance must be installed at each end of each MS/TP or Modbud RTU network segment, or two per MS/TP or Modbus RTU network. Ensure that this
requirement is not overlooked in laying out the network architecture and ordering product.
Repeater
A repeater is not necessary unless the MS/TP or Modbus RTU network is extended beyond
1,000 m.
Network Configuration
BACnet MS/TP Network Notes:
To a BACnet MS/TP
Network Supervisor
1. Ensure the recommended balanced
cable is used.
2. Ensure the cable is installed as a daisy
chain from one device to the next
(1,000 m maximum) and the shield is
grounded at one single point of the
network only.
3. Ensure a MS/TP terminator is installed
on each end of each MS/TP network.
4. The maximum nodes per MS/TP
network is 32 without a repeater.
BACnet MS/TP Network
BMG
(Master)
BMG
(Master)
Modbus RTU Network Notes:
RS485 Modbus RTU Network
Slaves
NT10
4
NT10
NT10
NT10
1. Ensure the recommended balanced
cable is used.
2. Ensure the cable is installed as a daisy
chain from one device to the next
(1,000 m maximum) and the shield is
grounded at one single point of the
network only.
3. Ensure a terminator is installed on each
end of each or Modbus RTU network.
4. The maximum nodes per Modbus RTU
network is 32
Wiring Diagrams and Application Notes
The NT10 thermostat consists of two basic units: the Network Control Unit and the Power Supply Unit. While all line-voltage
wiring is terminated at the Power Supply Unit, all connections between Network Control Unit and Power Supply Unit are of
low-voltage signaling wires.
■ Cut jumper JP1 if external sensor is wired to SR1 and GND. Run the wiring away from any electrical motors or power wiring.
Failure to do so may result in poor thermostat performance due to electrical noise.
■ 22 AWG twisted shielded pair double-insulated cable is recommended as remote sensor wiring and its length must not
■
■
■
■
■
■
■
■
exceed 25 m.
Do not bundle and run power wiring and remote sensor wiring in the same conduit.
Connecting wires between Network Control Unit and Power Supply Unit must not exceed 15 m.
Seasonal changeover sensor or switch is only applicable to heat only or cool only 2-pipe model only.
The seasonal changeover sensor should be wrapped around the supply water pipe when associated with a water system.
When the changeover sensor temperature exceeds 30 ºC, the thermostat enters into heating mode.
Unoccupied contact closure activates energy saving mode.
Window contact closure activates window mode.
Hidden-line wiring for Terminals V2 and 6 are applicable to dual-output model only.
The thermostat outputs are designed for controlling zone valves. If used for controlling electric heaters, external contactors must be used.
More wiring diagrams are available, please contact the nearest Cyrus’ representative for details
WARNING
Incorrect wiring connection may cause permanent equipment damages to the thermostat
Sensor wires: 22 AWG twisted shielded pair
double-insulated cable
NT10-1 / NT10-2 Wiring Diagram
Network
Control
Unit
Sensor wires: 22 AWG twisted shielded pair
double-insulated cable
Power
Supply
Unit
Inter-connecting wires: Cat 5e twisted
6-conductor cable (shielded or unshielded)
RS485 communications wires:
22 AWG twisted shielded pair
double-insulated cable
Power wires: wire size
1 mm2 or 18 AWG solid
copper recommended
5
Model Selection Guide
NT1
Power
Valve Control Output
Options & LCD layout
0
=
220 VAC, 50/60 Hz
2
=
220 VAC, 50/60 Hz with 24 VAC valve output
1
=
2-wire on-off (Heating only or Cooling only2-pipe)
1F
=
3-wire floating (Heating only or Cooling only 2-pipe)
1A
=
0-10 VDC (Heating only or Cooling only 2-pipe)
2
=
2-wire on-off (Heating / Cooling 4-pipe)
2F
=
3-wire floating (Heating / Cooling 4-pipe)
2A
=
0-10 VDC (Heating / Cooling 4-pipe)
2AH
=
0-10 VDC Cooling, 2-wire on-off heating
Nil
=
Grey Face-plate
W
=
White Face-plate
R
=
IR Receiver for Remote Controller
0
-
2AH
-
W
R
0
2AH
W
R
Specifications
Product
NT10 Series Modbus RTU Networking LCD Thermostat
Power
220 V, ±10%, 50/60 Hz
Temperature display range
5-35ºC in 0.5 K increments: accuracy ±1 K
Temperature set point range
5-35ºC in 0.5 K increments
Temperature set point limits
5-35ºC
Sensing element
NTC thermistor, 10 kΩ @ 25ºC,accuracy ± 0.5 K @ 25ºC
Binary inputs
4 binary inputs for external voltage-free contacts
(including Unoccupied / Window Contact)
RS-485 communication speed
Selectable baud rate is fixed at 19,200 bps
Device MAC address
01-32 thermostat addresses: change in setup menu
Modbus network guideline
Maximum 32 devices and maximum 1,000 m cable length
Enclosure
Material: Self-extinguishing, molded ABS
Finish: Off white housing
Protective class
IP30
Electrical ratings
Valve output (on-off and 3-wire floating models)
220 V, 5 A (2A)
Valve output (on-off and 3-wire floating models)
24 V, 0.3A (0.3 A)
Valve output impedance (0-10 VDC models)
Minimum 10,000 Ω
Fan output relays
220 V, 5 A (2 A)
Total rating
220 V, 5 A maximum
Ambient/ storage limits
0 to 55ºC / -30 to 50ºC, 10 to 90% RH non-condensing
Termination
Non-removable terminal blocks and pluggable sockets
Certifications
CE
Shipping weight
Approx. 550g
Dimensions
See Dimension drawing
The specification above are normal and conform to generally acceptable industry standard. Cyrus is not
responsible for damages resulting from misapplication or misuse of its products.
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