IMP PUMPS NMT Smart C User manual

NMTC module
7340055, v26, for software revision 2.239 onwards
Installation and operating manual for
 NMT Smart C
 NMT Max C
 NMT Lan C
EN

2
WARNING!
Prior to installation and commissioning, read these instructions first. Installation and operation
must comply with local regulations.
WARNING!
Installation and use of this product requires experience and knowledge of this or similar products.
Persons with reduced physical, mental or sensory capabilities must not use this product, unless
properly instructed and supervised. Children must not be allowed to play with this product.
CONTENTS
Contents ................................................................ 2
1. Symbols and conventions used in this
document .............................................................. 3
1.1. Abbreviations and conventions .............. 3
2. Introduction .................................................. 4
2.1. System diagram....................................... 4
2.2. Specifications .......................................... 4
3. Module layout............................................... 7
3.1. Terminals ................................................ 7
3.2. Application examples .............................. 8
3.3. Wiring considerations ............................. 9
3.4. Module installation ................................. 9
3.5. Connecting the module wiring .............. 12
4. Control modes and priorities ........................14
4.1. Priority of settings ................................. 14
4.2. Control variables ................................... 14
4.3. Module mode selection ........................ 15
4.4. Mode 1 (2..10v) ..................................... 16
Digital (switch) control ................................... 16
Analog control ............................................... 18
4.5. Mode 2 (0..10v) ..................................... 21
4.6. Mode 3, 4 (PWM) .................................. 22
Mode 3 (Solar) ............................................... 24
Mode 4 (Heating) ........................................... 25
PWM output .................................................. 25
5. Relay output ................................................26
6. RS-485 bus ...................................................27
6.1. RS-485 related interface ....................... 27
6.2. Services .................................................. 27
6.3. Bus topology .......................................... 27
6.4. Connection to RS-485 ............................ 27
6.5. Speed, parity and address ..................... 27
Modbus RTU ................................................... 27
6.6. Termination ........................................... 28
7. Ethernet bus ................................................ 29
7.1. Ethernet related interface ..................... 29
7.2. Services .................................................. 29
7.3. Bus topology .......................................... 29
7.4. Connecting to pump ad-hoc .................. 29
7.5. Connecting to pump via router ............. 29
7.6. Pump configuration over Ethernet ........ 29
8. Modbus ....................................................... 30
8.1. Modbus related interface ...................... 30
8.2. Modbus RTU over RS-485 ...................... 30
8.3. Modbus over Ethernet........................... 30
8.4. Register overview .................................. 30
8.5. NMTC control registers .......................... 30
8.6. NMTC status registers ........................... 32
8.7. Pump control registers .......................... 33
8.8. Pump status registers ............................ 34
8.9. Pump data registers ............................... 35
9. HTTP server ................................................. 36
9.1. WEB server ............................................ 36
9.2. XML data ................................................ 37
10. Fault finding ................................................ 38
10.1. Error codes ............................................ 38

3
1. SYMBOLS AND CONVENTIONS USED IN THIS DOCUMENT
WARNING!
Denotes that a failure to observe those instructions might cause damage to equipment or pose
danger to the user.
NOTE: - Gives additional tips or instructions that might ease the job and ensure proper operation.
NOTE:
 Data in this document are subject to change.
 Actual implementation might differ by pump model and software revision.
 Make sure you are using the right manual for your product.
 Verify proper operation in the final system.
 Manufacturer cannot be held responsible for problems caused either directly or indirectly by the use
of information in this manual.
1.1. ABBREVIATIONS AND CONVENTIONS
Abbreviation Description
Baud, Baud rate Serial communication speed, in bits per second including start, parity and stop bits.
CRC Cyclic Redundancy Check, additional bytes used to confirm valid data transmission.
Ethernet IEEE 802.3, mostly referring to 10BASE-T RJ-45 connector present on board.
H Differential pressure, often called Head.
LED Light Emitting Diode.
Modbus A communication protocol used for device automation and remote access.
NMTC NMT pump Communication module.
Q Pump flow or flow rate.
RTU Remote Terminal Unit.
RS-485 Multi drop serial network wiring, used to transfer data.
TCP Transmission Control Protocol is a digital data packet handling
UDP User Datagram Protocol is a digital data packet handling
For Modbus use, this manual assumes that the reader is familiar with commissioning and configuring of
Modbus devices.
For Ethernet and web interface use, this manual assumes that the reader knows how to configure or already
has preconfigured Ethernet network.
For use of analog signals and relay output signals, external controller needs to be configured and used. Proper
operating mode must also be selected for the module.

4
2. INTRODUCTION
This manual describes the NMTC module for NMT range of pumps that is either integrated (NMT LAN C) or
separately (NMT Smart C and NMT MAX C) available.
Purpose of this module is to provide communication interface to the pump.
This module is intended for various remote control applications, including:
 Remote on/off
 Analog 0..10 V voltage control and feedback
 Analog 4..20 mA control and feedback
 PWM control and feedback
 Status relay feedback
 Modbus slave/device
 Web browser access over Ethernet
2.1. SYSTEM DIAGRAM
There are several possible connection configurations. Not all functions can be used simultaneously due to
limited amount of outputs, inputs and inlet glands.
Typical configurations
- on/off + 0..10 V + relay output
- Ethernet + on/off + 0..10 V
- Ethernet + on/off + relay output
- Modbus RTU + Relay output
- Modbus RTU + Ethernet
- …
2.2. SPECIFICATIONS
The table below is an overview of NMTC specifications. For details, please refer to appropriate sections
of this manual.
General data
Ambient humidity <95 % relative, non-
condensing
Also see appropriate pump data for other
ambient specifications.
Dimensions [Φ x H] 112 mm x 32 (45) mm Module dimensions without glands.
Power supply and
connection
5 V@500 mA supplied
by the pump
6-pin connector further extended for display.

5
RS-485
Connector type Screwless terminals 2+1 pins. See section 3.1
Terminals
Data protocol
 Modbus RTU Only one at a time.
Bus wire
configuration
Two-wire + common Conductors: A, B and COM (Common).
See section 3.1
Terminals
Communication
transceiver
Integrated, 1/8 of
standard load
Connect either via passive taps or daisy chain.
Maximum cable
length
1200 m See section 6.6
Termination
Line termination Not present Line termination is not integrated. For low
speed/short distance, termination can be
omitted. Otherwise, terminate the line externally
on both ends.
Supported
transmission speeds
1200, 2400, 4800,
9600, 19200, 38400
baud
Settable over Modbus register [default=19200].
Start bits, data bits 1, 8 Fixed.
Stop bits 1 or 2 1 stop bit minimum, up to 2 when parity not
enabled [default=1]
Parity bit Even/odd/none [default=Even]
Visual diagnostics LED2 Flashing yellow when data reception detected.
Combined (OR) with Ethernet ACT function.
Maximum number of
devices
247 Limited by possible Modbus addresses to 247. 1/8
nominal load enables 256 devices.
Isolation Common ground
(COM) with SET1, SET2
and SET3.
Bus shares common ground with other signals.
Ethernet
Connector type RJ-45 10BASE-T, 10Mbit/s connection.
Connection type and
services
- Http Web server (port 80)
- Firmware update over http
- Modbus (port 502)
Default IP address 192.168.0.245 192.168.0.246 for right twin pump.
Ethernet visual
diagnostics
LED1 / LINK Slowly blinking when module is powered,
permanently lid when link established.
LED2 / ACT Flashing yellow when data reception detected.
Combined (OR) with Modbus data reception
indication.
Modbus RTU over RS-485
Slave address 1-247 Default is 245, settable over Modbus. See section
6.5
Speed, parity and address
Maximum Modbus
packet size
256 bytes Including address (1) and CRC (2) bytes.
Modbus over Ethernet
Server address 192.168.0.245:502 IP address is the same as for pump web
server, port is fixed as 502
Device address 245 Default value, can be changed over Modbus
Data format and
protocols
 Modbus TCP
 Modbus RTU over TCP
 Modbus UDP
 Modbus RTU over UDP
Protocol is automatically selected according
to established connection and received
request.

6
Analog signals (SET1, SET2, SET3)
Input voltage range -1..32 VDC When used as input.
Output voltage
source range
0..12 V When used as voltage output. 5 mA max. Load
allowed per output.
Input resistance ~100 kΩ 0.5 mA load is added for most configurations.
Output current sink
range
0..33 mA (4-20 mA) Current sink to COM if configured as current
output.
PWM input threshold ~3 V 5 mA current sink added.
PWM input frequency 0..10 kHz
PWM out frequency 75 Hz
Relay specifications
Connection type Screwless terminals
Rating
- 230 VAC, 3 A, AC1
-
32 VDC, 3 A
Potential free changeover contact.

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3. MODULE LAYOUT
3.1. TERMINALS
Terminal
Designation Terminal description
MODE Mode selection rotary switch.
Position read at power-on.
Used to configure mode of
operation for the circuit. See section 4.3 “Module mode selection”.
LED1 / LINK
Slowly blinking when module is powered.
Blinking fast on Modbus Error
Permanently lid when Ethernet link established.
Ethernet 10BASE-T RJ-45 connector.
LED2 / ACT Indicates Ethernet activity or RS-485 activity.
B/D- RS-485 negative data signal.
A/D+ RS-485 positive data signal.
SET1 / RUN Control signal 1.
COM / 0V RS-485 common and analog input common return.
SET2 / MAX Control signal 2.
SET3 / FB Control signal 3.
+24V 24 V, 50 mA output (only on some models)
NC Normally closed relay contact. Opens when relay is active.
C Relay common contact.
NO / OK Normally open relay contact. Closes when relay is active.
Terminal layout with factory configuration
LAN C, MAX (>850W) terminals SMART C, MAX C (<850W) terminals
9
1
4
9

8
3.2. APPLICATION EXAMPLES
Relay, Analog and Modbus connection
Relay and Ethernet connection
1
9
NOTE: To maintain pump IP (ingress protection), the network cable should be pulled through the gland inlet
and then crimped to a connector.

9
3.3. WIRING CONSIDERATIONS
 All cables connected must be heat-resistant to at least +85 °C.
 All cables connected must be installed in accordance with EN 60204-1.
 All wires to the communications module must be connected to the terminals or cut. No loose wiring
permitted.
WARNING!
If voltages over 24 V AC/DC are possible on NO, C, NC terminals:
 Wires should be routed so no wire crosses the center barrier.
 Relay cable (NO, C, NC) must be separated from all other wiring with reinforced insulation.
Cable outer layer must not be stripped longer than 15 mm. See “Cabling preparation”
below.
Cabling preparation
Cable for the screwless terminals should
be prepared as shown on the left.
Tools
2.4 mm wide flat-bladed screwdriver is
needed to press the terminal spring while
inserting the cable.
Same tool is also used to rotate the Mode
switch.
3.4. MODULE INSTALLATION
Only for NMT Smart and NMT MAX pump models.
Installing the module
WARNING!
Before performing any work on
the module, make sure that the
pump and module electricity
supply has been switched off and
that it cannot be accidently
switched on.
Press two top hooks on the display panel. Use
flat tip screwdriver if needed and
simultaneously pull display panel away from
the pump.

10
Disconnect display panel cable to ease access
to the module wiring. Wiring can now be
connected.
Connect the NMTC module with power
electronics.
Make sure that the position tab and position
slot are aligned.

11
Push the NMTC module back to the heat sink

12
3.5. CONNECTING THE MODULE WIRING
Only for NMT Smart and NMT MAX pump models.
Opening the cover
WARNING!
Before performing any
work on the module,
make sure that the
pump and module
electricity supply has
been switched off and
that it cannot be
accidently switched on.
Press two top hooks on the display
panel (Use flat tip screwdriver if
needed) and simultaneously pull
display panel away from the pump.
Disconnect display panel cable to ease
access to the module wiring.
Wiring can now be connected.

13
Closing the cover
WARNING!
Before performing
any work on the
module, make sure
that the pump and
module electricity
supply has been
switched off and
that it cannot be
accidently switched
on.
Reconnect display panel cable.
Make sure that the position tab
and position slot are aligned.
Make sure that the hooks are
aligned.
Push the display back to the
NMTC module.

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4. CONTROL MODES AND PRIORITIES
4.1. PRIORITY OF SETTINGS
Several signals will influence the pump operation. For this reason, settings have priorities as shown in the table
below. If two or more functions are active at the same time, the one with highest priority will take precedence.
Priority Pump control panel &
Ethernet settings External signals1 Modbus control
1 Stop (OFF)
2 Night mode active
2
3 Max. RPM (Hi)
4 Min. curve
4
5 Stop (Run not active)
6 Max. curve4 Stop3
7 Set point setting4 Set point setting
3
8 Set point setting
4
Examples:
 Stop on the pump display panel will stop the pump, regardless of external set point.
 If External Run input is inactive, the pump cannot be started over Modbus, but can be set to max RPM on
the display panel.
4.2. CONTROL VARIABLES
Pump will respond to external controls according to selected pump operating mode. Consult proper pump
operating manual for explanation.
Symbol Regulation mode Module set point controls:
Auto mode -
(RUN only)
Proportional pressure Maximum head
Constant pressure Maximum head
Constant speed Speed
(RPM)
Combined5 -
(Web interface only)
Night mode6 -
(RUN only)
1 Not all inputs are available in all modes.
2 External and Modbus Stop signals become active in night mode. Due to possible confusion, use of night mode
is discouraged while using external control.
3 Only available when pump is bus controlled.
4 Not available when pump is bus controlled.
5 Multiple limits can be set. Not available on all pumps.
6 Night mode is not independent regulation mode.

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4.3. MODULE MODE SELECTION
WARNING!
Before performing any work on the module, make sure that the pump and module electricity
supply has been switched off and that it cannot be accidently switched on.
There is a mode selection rotary switch in the terminal box. It can be rotated by gently inserting a screwdriver
into the arrow mark on top and rotating the switch to desired value. This enables manual configuration
according to table below. For advanced configuration, place rotary switch to position 0 and configure module
over network.
Mode
switch
position
Function Description
0 Free configuration Terminal functions are configured over Ethernet interface.
1
Mode 1
(2-10V control)
SET1 = RUN input
SET2 = MAX input
SET3 = FB (10.5 V) output, can be used to supply RUN and MAX inputs.
See section “4.4 Mode 1”.
2
Mode 2
(0-10V control)
SET1 = RUN input
SET2 = SPEED input
SET3 = FB (10.5 V) output, can be used to supply RUN and SPEED
inputs.
See section “4.5 Mode 2”.
3
Mode 3
(PWM Solar)
SET1 = PWM-in (0 % = Pump OFF)
SET2 = PWM-out status
SET3 = FB (10.5 V) output, can be used to supply SET1 and SET2 bias.
See section “4.6 Mode 3, 4 ”
4
Mode 4
(PWM Heating)
SET1 = PWM-in (100 % = Pump OFF)
SET2 = PWM-out status
SET3 = FB (10.5 V) output, can be used to supply SET1 and SET2 bias.
See section “4.6 Mode 3, 4 ”
5 RESERVED Reserved for future or customer specific use.
6 Show relay
configuration
LED1 and LED2 will show relay configuration.
See section “5. Relay output”.
7
Change relay
configuration
Relay configuration will be increased (0->1, 1->2, 2->0) when power is
turned on.
LED1 and LED2 will show current relay configuration.
See section “5. Relay output”.
8
Twin reset to factory Same as Mode 9, with exception of:
module IP address is set to 192.168.0.246
Twin IP address is set to 192.168.0.245
9
Reset to factory This mode will set communication interface to default values. Main
purpose is to restore default settings.
NOTE:
 SET1, SET2, SET3 will output test voltages of 10 V, 7 V and 5 V
respectively. RS-485 port is actively driven. Relay will cycle.
 Make sure that external controllers will not be harmed by
conditions above, otherwise disconnect.

16
4.4. MODE 1 (2..10V)
Mode 1 is most often used mode of operation. It has 2 pre-prepared inputs that can be used for either digital
control or with analog control voltages. Additional 10.5V output provides voltage feedback for analog or digital
control.
Terminal
designation Signal function
SET1 / RUN RUN input. Signal load 0.5 mA.
COM / 0V Common ground for voltage input.
SET2 / MAX MAX input. Signal load 0.5 mA
SET3 / FB 10.5 V feedback voltage for SET1 and SET2.
DIGITAL (SWITCH) CONTROL
Mode 1 connection configurations (switch)
1
4
9

17
Contact position Function Description
RUN MAX
Stop the pump The pump is stopped
Start the pump
The pump will run with internal set point
H
Q
Minimum curve
The pump will run with minimal speed for
selected regulation mode
H
Q
Maximum curve
The pump will run with maximum speed
form selected regulation mode
H
Q

18
ANALOG CONTROL
Mode 1 connection configurations (analog)
1
4
9
2
1
3
6
7
8
9

19
1
9
6
1
9

20
RUN
voltage
MAX
voltage Function
< 2 V < 1 V Pump stopped
> 3 V < 1 V Internal regulation
< 2 V 2..10 V Minimum curve
> 3 V 2..10 V
Figure 1: External 2..10 V transfer curve for Mode 1
0..10 V
(RUN+MAX)
Figure 2: External 0..10 V transfer curve for Mode 1