Macnaught MX Series Manuale utente
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INSTRUCTION MANUAL
MX Series
Pulser Options
MXL-INST-PULSE
Rev 4
04/2021
This manual contains connection and operating
instructions for a selection of Pulse output options.
Please read and retain this instruction manual to
assist you in the operation and maintenance of these
products.
In addition Macnaught offer a comprehensive set of
online support materials to compliment this
instruction manual. You can access the website by
scanning the QR code or visiting the Macnaught
website www.macnaughtflowmeasurement.com.au
To the Owner
Standard Pulse Cap
fitted to meter
Industrial Pulse Cap
fitted to meter
DIN Pulse Cap
fitted to meter
Page 2 of 16
Types of Switches
Reed Switch Page # 3
Hall Effect Switch Page # 3
Technical Specifications for Reed & Hall Switch Page # 3
Available Configurations for Standard, Industrial and DIN Pulse Caps Page # 3
Circuit Diagram for Pulse Caps Page # 4
Standard Pulse Cap
Description & Wiring Instructions Page # 6
Ordering Code Page # 7
Assembly & Disassembly Page # 7
Industrial Pulse Cap
Description & Wiring Instructions Page # 9
Cable Specifications for Standard/Industrial Pulse Caps Page # 9
Ordering Code Page # 10
Assembly & Disassembly Page # 10
DIN Pulse Cap
Description Page # 12
Ordering Code Page # 12
Accessories Page # 12
Connector Details Page # 13
INDEX
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Reed Switch: Reed Switch is a 2-wire device which
triggers by magnet inside the rotors as they spin. To
maximise the life of the reed switch, the pulse board
comes equipped with a 1k8Ω current limiting resistor
in series.
Hall Effect Switch: Hall Effect switch is a 3-wire
device which triggers by south pole of the magnet
inside the rotors as they spin. This switch is NPN
type. The switch circuit is equipped with a 4k7Ω pull
-up resistor between signal and supply.
Reed Switch
Hall Effect Switch
The Below 3 configurations are available with Standard, Industrial and DIN pulse caps
Configuration 1 Reed and Hall Effect Sensors
Configuration 2 Dual Hall Effect Sensors
Configuration 3 Dual reed switches
Types of Switches
Output Signals Standard Pulse Meter 2 x Digital (Square Wave)
Reed Switch
(Mechanical Sensor)
Current Maximum 500mA
Voltage Maximum 30V DC
Contact Rating Maximum110W
Hall Effect Switch
(Electronic Sensor)
Maximum Supply Current 7.5mA
Maximum Output Current 25mA
Operating Voltage 4.5V to 24V DC
Output Type Open-Collector NPN
1.Contact rating maximum is 10W. Neither current nor voltage maximums should be exceeded in achieving this.
Technical Specifications for Reed & Hall Switches
Available Configurations for Standard, Industrial and DIN Pulse Caps
Page 4 of 16
Circuit Diagrams for Available Configurations
Reed/ Hall
Reed/ Reed
Hall/ Hall
Page 5 of 16
Standard Pulse Cap
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Standard Pulse Cap Output types A, I, J, K WIRING INSTRUCTIONS
Standard Pulse Cap incorporates the M-LOCK (1/4” turn) mounting system. The housing is made up of
polypropylene with PCB fitted inside.
Standard Pulse Cap PCB
- Standard Pulse Cap Temperature (-40 °C -120 °C)
- IP 67
Page 7 of 16
Standard Pulse Cap Output types A, I, J, K
Illustration
Standard Pulse Cap fitted to 1” meter
* MXD-JS generate Quadrature Pulse Output
** MXD-KS has one hall effect high resolution sensor.
Assembly/Disassembly
1. Rotate the pulse cap 90° anticlockwise to disassemble
2. Pull the cap away from body
1
No Tool required to assemble/dissemble
Place pulse cap onto the body and rotate 90° clockwise to reassemble
2
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Industrial Pulse Cap
Page 9 of 16
Illustration
Industrial Pulse Cap Output Type (MXD-xCx-xx) WIRING INSTRUCTIONS
Cable Specifications for Standard/Industrial Pulse Cap
Minimal cable specification recommended for wire:
5 core, 24 AWG each
drain wire AND shielding/ copper braiding
Temperature rating: -20 - 80 °C
Voltage rating: 300 V
- Maximum cable length should not exceed 60 metres.
- If cable is extended and/or longer than 10m, it is highly recommended to use 24V power supply for Hall
Switch and reed switch.
PCB
* MXD-xCx-HH generate Quadrature Pulse Output
- Industrial Pulse Cap Temperature (-25 °C -120 °C)
- IP 67
Industrial Pulse Cap is fixed to the flow meter and
does not incorporate M-lock feature. It comes with
Conduit Entry to facilitate customers for own wiring.
Page 10 of 16
Industrial Pulse Cap Output Type (MXD-xCx-xx)
Pulser Cap Screws
Pulser Cap
Pulser Cap Gasket
PCB screws
PCB Circlip
Base Plate
Flowmeter
The Industrial Pulse Cap comprises of 3 major
components.
1. Industrial Pulse Cap
2. PCB (sensor board)
3. Secure Base Plate
In order to access the PCB, or for the removal/
replacement of the complete Pulser Module, the
Following procedure applies.
Disassembly/Reassembly
Remove the 4 socket head cap screws holding
the Industrial Pulse Cap to the Base Plate.
Take care not to lose the gasket.
Lift the Pulse Cap to expose the terminal block
for the connection/disconnection of the signal
cables.
The PCB can be removed by loosening the
two screws securing it to the Base Plate.
Note: It is not necessary to remove the PCB if
the objective is to remove the complete base
plate (see next step)
To separate the Base Plate from the Flow
meter body, remove the stainless steel Cir-
clip.
Reassemble by reversing the above sequence.
* Industrial Pulse Cap Housing material “Aluminium” to be fitted to flow meter having Aluminium Body
* Industrial Pulse Cap Housing material “SS 316” to be fitted to flow meter having SS 316 Body
Illustration
Industrial Pulse Cap fitted to 1” meter
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