IMP PUMPS NMT Max C, NMT Lan C, NMT Smart C Installation And Operating Manual

Installation and operating manual for

NMT Lan C.

EN

NMTC module

• NMT Smart C,

• NMT Max C,

•

7340055, v22

2

WARNING!

comply with local regulations.

WARNING!

properly instructed and supervised. Children must not be allowed to play with this product.

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

Prior to installation and commissioning, read these instructions first. Installation and operation must

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

4

1. SYMBOLS AND CONVENTIONS USED IN THIS DOCUMENT

WARNING!

danger to the user.

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.

Denotes that a failure to observe those instructions might cause damage to equipment or pose

NOTE: - Gives additional tips or instructions that might ease the job and ensure proper operation.

1.1. ABBREVIATIONS AND CONVENTIONS

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

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

…

General data

Ambient humidity

<95 % relative, non­condensing

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.

There are several possible connection configurations. Not all functions can be used simultaneously.

2.2. SPECIFICATIONS

The table below is an overview of NMTC specifications. For details, please refer to appropriate sections
of this manual.

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.

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)

SET3.

Modbus shares common ground with other signals.

Ethernet specifications

Ethernet connector

RJ-45

10BASE-T, 10Mbit/s connection.

Connection type and

-

Web server (port 80)

-

Optional Modbus RTU over TCP/IP

Default IP address

192.168.0.245

192.168.0.246 for right twin pump.

Ethernet visual

LED1 / LINK

Slowly blinking when module is powered,
permanently lid when link established.

LED2 / ACT

Flashing yellow when data reception detected.

indication.

Mode selection switch

Adjustment

10 position rotary

Position read at power-on.

configuration reset.

Otherwise, terminate the line externally on both

with SET1, SET2 and

services

diagnostics

-

Firmware update over web interface

switch

Combined (OR) with Modbus data reception

Used for relay configuration and module

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.

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

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.

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.

3. MODULE LAYOUT

Description

Blinking fast when Modbus Error

8

WARNING!

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 mm

2

Cable for the screwless terminals should be

Tools

2.4 mm wide flat-bladed screwdriver is

switch.

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.

• 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.

prepared as shown on the left.

needed to press the terminal spring while
inserting the cable.
Same tool is also used to rotate the Mode

9

Installing the module

3.2. MODULE INSTALLATION

Only for NMT Smart and NMT MAX pump models.

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!

accidently switched on.

Disconnect display panel cable to ease

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

Press two top hooks on the display panel
(Use flat tip screwdriver if needed) and
simultaneously pull display panel away
from the pump.

access to the module wiring.

Wiring can now be connected.