IMP PUMPS NMT Max C User manual

NMTC module
7340055, v22
Installation and operating manual for
•NMT Smart C,
•NMT Max C,
•
NMT Lan C.
EN

2
CONTENTS
1. Symbols and conventions used in this
document.............................................................. 4
1.1. Abbreviations and conventions .............. 4
2. Introduction.................................................. 4
2.1. System diagram....................................... 5
2.2. Specifications .......................................... 5
3. Module layout............................................... 7
3.1. Connection considerations ..................... 8
3.2. MODULE INSTALLATION ......................... 9
3.3. Connecting the module wiring.............. 11
3.4. Connection examples............................ 13
4. Control modes and priorities........................15
4.1. Priority of settings................................. 15
4.2. Control variables................................... 15
4.3. Module mode selection ........................ 16
4.4. Mode 1.................................................. 17
Digital (switch) control................................... 17
Analog control ............................................... 19
4.5. Mode 2.................................................. 22
5. Relay output ................................................23
6. Ethernet ...................................................... 24
6.1. Bus topology ..........................................25
6.2. Connecting to pump ad-hoc ..................25
6.3. Connecting to pump via router .............25
6.4. Pump configuration over Ethernet........25
7. Modbus....................................................... 27
7.1. Modbus related interface......................27
7.2. Bus topology ..........................................27
7.3. Connection to Modbus..........................27
7.4. Speed, parity and address .....................27
7.5. Termination ...........................................27
7.6. Register block overview.........................28
7.7. NMTC Configuration register block .......28
7.8. NMTC Status register block ...................29
7.9. Pump control register block ..................30
7.10. Pump status register block ....................31
7.11. Pump data register block.......................32
8. Fault finding ................................................ 33
8.1. Error codes ............................................33
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.

4
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.
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 serial 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 Modbus data.
For Modbus use, this manual assumes that the reader is familiar with commissioning and configuring of
Modbus devices. It is also assumed that an existing Modbus RTU network on RS-485 wiring with Modbus
master is present.
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.
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.
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. This module is used for various remote control
applications, including:
•Remote on/off
•Analog 0..10 V voltage control
•Modbus remote control
•Status relay feedback
•Web access over Ethernet

5
2.1. SYSTEM DIAGRAM
There are several possible connection configurations. Not all functions can be used simultaneously.
on/off + 0..10 V + relay output
Modbus RTU + Relay output
Ethernet + on/off + 0..10 V
Modbus RTU + Ethernet
Ethernet + on/off + relay output
…
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
Dimensions without glands.
Power supply and
connection
5 V@500 mA supplied
by the pump
6-pin connector further extended for display.

6
Modbus specifications
Data protocol
Modbus RTU
Modbus connector
Screwless terminals
2+1 pins. See section 7.3 “ Connection to Modbus ”.
Modbus connection
type
RS-485
Modbus wire
configuration
Two-wire + common
Conductors: A, B and COM (Common).
See section 7.3 “ Connection to Modbus ”.
Communication
transceiver
Integrated, 1/8 of
standard load
Connect either via passive taps or daisy chain.
Maximum cable
length
1200 m
See section 7.5 “ Termination ”.
Slave address
1-247
Default is 245, settable over Modbus. See section
7.4 “ Speed, parity and address ”.
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 bit
1
Fixed.
Data bits
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]
Modbus visual
diagnostics
LED2
Flashing yellow when data reception detected.
Combined (OR) with Ethernet ACT function.
Maximum number of
Modbus devices
247
Limited by possible Modbus addresses to 247. 1/8
nominal load enables 256 devices.
Maximum Modbus
packet size
256 bytes
Including address (1) and CRC (2) bytes.
Isolation
Common ground (COM)
with SET1, SET2 and
SET3.
Modbus shares common ground with other signals.
Ethernet specifications
Ethernet connector
RJ-45
10BASE-T, 10Mbit/s connection.
Connection type and
services
- Web server (port 80)
- Firmware update over web interface
- Optional Modbus RTU over TCP/IP
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.
Mode selection switch
Adjustment
10 position rotary
switch
Position read at power-on.
Used for relay configuration and module
configuration reset.

7
Analog signals (SET1, SET2, SET3)
Input voltage range
-1..32 VDC
When used as input.
Output voltage range
0..12 V
When used as 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 output.
Relay specifications
Connection type
Screwless terminals
Rating
-230 VAC, 3 A, AC1
- 32 VDC, 3 A
Potential free changeover contact.
3. MODULE LAYOUT
2
1
3
4
5
6
7
8
9
0
NC
C
NO
RELAY ANALOG
A/D+
SET2 SET3 SET1
+24 V
0V
B/D-
0V
RS 485
ETHERNET
LED2 LED1
MODE
2
1
3
4
5
6
7
8
9
0
SET3/ FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
NC
C
NO
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
Terminal
Designation
Description
MODE
Mode selection rotary switch. 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 when Modbus Error
Permanently lid when Ethernet link established.
Ethernet
10BASE-T RJ-45 connector.
LED2 / ACT
Indicates Ethernet activity or Modbus activity.
B/D-
RS-485 negative data signal for Modbus.
A/D+
RS-485 positive data signal for Modbus.
SET1 / RUN
Control signal 1.
COM / 0V
RS-485 common and analog input common (ground).
SET2 / MAX
Control signal 2.
SET3 / FB
Control signal 3.
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.

8
3.1. CONNECTION 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.
•If voltages over 24 V AC/DC are possible on NO, C, NC terminals.
WARNING!
•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
max. 15 mm
8(7-10)mm
0.25 - 1 mm2
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.

9
3.2. 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.
Disconnect display panel cable to ease access
to the module wiring. Wiring can now be
connected.
Connect the NMTC module with power
electronics.

10
Make sure that the position tab and position
slot are aligned.
Push the NMTC module back to the heat sink

11
3.3. CONNECTING THE MODULE WIRING
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.

12
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.

13
3.4. CONNECTION EXAMPLES
Default (factory) configuration
2
1
3
4
5
6
7
8
9
0
NC
C
NO
RELAY ANALOG
A/D+
SET2 SET3 SET1
+24 V
0V
B/D-
0V
RS 485
ETHERNET
LED2 LED1
MODE
2
1
3
4
5
6
7
8
9
0
SET3/ FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
NC
C
NO
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
Relay and Modbus connection
2
1
3
4
5
6
7
8
9
0
NC
C
NO
RELAY ANALOG
A/D+
SET2
SET3
SET1
+24 V
0V
B/D-
0V
ETHERNET
LED2 LED1
MODE
ALARM
Modbus signal
Run
Max
2
1
3
4
5
6
7
8
9
0
SET3/ FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
NC
C
NO
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
Run Max
Modbus signal
ALARM

14
Relay and Ethernet connection
2
1
3
4
5
6
7
8
9
0
NC
C
NO
RELAY ANALOG
A/D+
SET2 SET3 SET1
+24 V
0V
B/D-
0V
RS 485
ETHERNET
LED2 LED1
MODE
2
1
3
4
5
6
7
8
9
0
SET3/ FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
NC
C
NO
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
NOTE: To maintain pump IP protection, the network cable should be pulled through the gland inlet and then
crimped to a connector.

15
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 signals1Modbus control
1
Stop (OFF)
2
Night mode active2
3
Max. RPM (Hi)
4
Min. curve4
5
Stop (Run not active)
6
Max. curve4
Stop3
7
Set point setting4
Set point setting3
8
Set point setting4
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)
1Not all inputs are available in all modes.
2External and Modbus Stop signals become active in night mode. Due to possible confusion, use of night mode
is discouraged while using external control.
3Only available when pump is bus controlled.
4Not available when pump is bus controlled.
5Multiple limits can be set. Not available on all pumps.
6Night mode is not independent regulation mode.

16
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.
Mode
switch
position
Function Description
0
Free configuration
Terminal functions are configured over Ethernet interface.
1
Mode 1
SET1 = RUN input
SET2 = MAX input
SET3 = FB (10.5 V) output, used to supply RUN and MAX inputs. External
voltage source can also be used.
RS-485 = Modbus interface.
See section “4.4 Mode 1”.
2
Mode 2
SET1 = RUN input
SET2 = SPEED input
SET3 = FB (10.5 V) output, used to supply RUN and MAX inputs. External
5-24 V voltage source can also be used.
RS-485 = Modbus interface
See section “4.5 Mode 2”.
3..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 electricity
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:
•Disconnect any SET1, SET2 and SET3 connections when using
this mode to prevent possible harm to controller. 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. This is used for
testing purposes.
•It is recommended that all module wires are disconnected to
prevent possible harm to external controllers.

17
4.4. MODE 1
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)
2
1
3
4
5
6
7
8
9
0
NC
C
NO
RELAY ANALOG
A/D+
SET2 SET3 SET1
+24 V
0V
B/D-
0V
ETHERNET
LED2 LED1
MODE
Run
Max
2
1
3
4
5
6
7
8
9
0
SET3/ FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
Run Max

18
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

19
ANALOG CONTROL
Mode 1 connection configurations (analog)
2
1
3
4
5
6
7
8
9
0
SET3/ FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
Run
2
1
3
4
5
6
7
8
9
0
SET3/ FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
0…10 V
Run
2
1
3
4
5
6
7
8
9
0
SET3/ FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
2
1
3
4
5
6
7
8
9
0
SET3/ FB
SET2 / MAX
COM / 0V
SET1 / RUN
A/D +
B/D -
LED2 / ACT
LED1 / LINK
ETHERNET
MODE
0…10 V

20
2
1
3
4
5
6
7
8
9
0
NC
C
NO
RELAY
A/D+
SET2
SET3 SET1
+24 V
0V
B/D-
0V
RS 485
ETHERNET
LED2 LED1
MODE
Run
2
1
3
4
5
6
7
8
9
0
NC
C
NO
RELAY
A/D+
SET2 SET3 SET1
+24 V
0V
B/D-
0V
RS 485
ETHERNET
LED2 LED1
MODE
0…10 V
Run
2
1
3
4
5
6
7
8
9
0
NC
C
NO
RELAY
A/D+
SET2 SET3 SET1
+24 V
0V
B/D-
0V
RS 485
ETHERNET
LED2 LED1
MODE
2
1
3
4
5
6
7
8
9
0
NC
C
NO
RELAY
A/D+
SET2 SET3 SET1
+24 V
0V
B/D-
0V
RS 485
ETHERNET
LED2 LED1
MODE
0…10 V

21
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
U[V]
Hmax / nmax
Hmin / nmin
Off
H/ n
1 2 3
H [m] /
n[RPM]
10
Hmin = 15% Hmax
nmin = 25% nmax
Figure 1: External 2..10 V transfer curve for Mode 1
0..10 V
(RUN+MAX)
U[V]
Hmax / nmax
Hmin / nmin
Off 1 2 3
H [m] /
n[RPM]
10
Hmin = 15% Hmax
nmin = 25% nmax
Figure 2: External 0..10 V transfer curve for Mode 1