Contrec 424 User manual

424-M-V1.5
BATCH CONTROLLER
MODEL 424
22 Jun 2018

424-M-V1.5

424-M-V1.5
Contents
1. INTRODUCTION 1
1.1 MODEL NUMBER DESIGNATION 3
2. SPECIFICATION 4
3. OPERATION 6
3.1 FRONT PANEL OPERATION 7
3.2 BATCH OPERATIONS 10
3.2.1 Control Relay Outputs 12
3.2.2 Signal Timeout 13
3.2.3 End of Batch 14
3.2.4 Auto Restart 15
3.2.5 Automatic Overrun Compensation 16
3.3 CALCULATION OF RATE AND TOTAL 17
3.3.1 Frequency Input 17
3.3.2 Filtering 18
3.4 TOTAL CONVERSION 20
3.5 THE OUTPUT PULSE AND FLOW ALARM 21
4. COMMS & OPTIONS 23
4.1 THE RS232/485 INTERFACE 23
4.1.1 Hardware 23
4.1.2 RS232 24
4.1.3 Multipoint Communication 25
4.1.4 Real Time Clock 26

424-M-V1.5
4.2 SOFTWARE PROTOCOL 27
4.2.1 Echoing Commands 27
4.2.2 Response Times 27
4.3 COMMANDS AND RESPONSES 28
4.4 PRINTER COMMUNICATIONS 31
4.4.1 Hardware Interconnection 31
4.4.2 Operation 33
4.4.3 Information Printed 33
4.5 THE 4-20mA OUTPUT OPTION 36
4.5.1 Load Specification 37
4.5.2 Calculation 37
5. CALIBRATION 39
5.1 PROGRAMMING THE SETUP PARAMETERS 41
5.2 ENTERING THE BATCH PARAMETERS 43
5.3 PROGRAMMING OPTIONS 45
5.4 TEST MENU 48
6. INPUT CIRCUITS 49
6.1 INPUT CIRCUIT FOR THE MODEL 424 49
6.2 FREQUENCY INPUT CONNECTION 50
6.3 REMOTE SWITCHES 52
7. INSTALLATION & MAINTENANCE 53
7.1 GENERAL 53
7.2 WIRING DESIGNATIONS FOR THE 424 55

424-M-V1.5
7.3 MAINTENANCE 56
8. TROUBLE SHOOTING 57
8.1 ERROR CODES 59
Index 60

424-M-V1.5

424-M-V1.5
Safety Notice
The information in this safety notice is for the prevention of injury to personnel
and damage to the instrument.
Use only in accordance with the instructions provided within this manual.
The manufacturer assumes no liability for injury or damage caused by misuse of
the instrument or modifications made to the instrument.
Qualified Personnel & Maintenance
The instrument must be installed, operated and serviced by persons who have
been properly trained and authorised. Personnel must read and understand this
manual prior to installation and operation of the instrument. Refer to section 7
for further information regarding permitted maintenance operations.
Static Hazard
The user should observe accepted safety practices for handling electronic
devices, especially during servicing.
Voltage Hazard
Before connecting power to the instrument, ensure that the supply voltage for
the AC or DC input is suitable. The AC voltage rating is as stated on the
instrument rating plate. Personnel should take all due care to avoid electric
shock. For safe operation it is essential to connect a mains safety earth to the
A.C. Power inlet. Do not operate at altitudes above 2000m.
Welding Hazard
Do not perform electric welding in close proximity to the instrument or its
interconnecting cables. If welding in these areas must be performed, disconnect
all cables from the instrument. Failure to do so may result in damage to the unit.
Moisture Hazard
To avoid electrical faults and corrosion of the instrument, do not allow moisture
to remain in contact with the instrument. Operate only in a clean, dry and
pollutant-free environment.
Disconnection Device
When powered from a mains supply this unit requires the provision of a suitable
mains isolation device, capable of interrupting both poles of the supply and
meeting your local wiring regulations, to be accessible near to the installed
instrument.

424-M-V1.5
FCC Notice
This equipment has been tested and found to comply with the limits for a
Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are
designed to provide reasonable protection against harmful interference
when the equipment is operated in a commercial environment. This
equipment generates, uses, and can radiate radio frequency energy and, if
not installed and used in accordance with the instruction manual, might
cause harmful interference to radio communications. Operation of this
equipment in a residential area is likely to cause harmful interference, in
which case the user will be required to correct the interference at his own
expense.
Properly shielded and grounded cables and connectors must be used in order
to meet FCC emission limits. Contrec Ltd. is not responsible for any radio or
television interference caused by using other than recommended cables and
connectors or by unauthorized changes or modifications to this equipment.
Unauthorized changes or modifications could void the user's authority to
operate the equipment.
This device complies with Part 15 of the FCC Rules. Operation is subject to the
following two conditions: (1) this device might not cause harmful
interference, and (2) this device must accept any interference received,
including interference that might cause undesired operation.

424-M-V1.5
Introduction 1
1. INTRODUCTION
The model 424 Batch Controller accepts pulse or frequency flow signals
and automatically controls the batching of fluids via a one or two stage
control valve.
The instruments are extremely flexible and easy to operate, with a four key
front panel operation that enables the batch quantity to be set, and batches
to be started or stopped.
This manual covers both the Model 424.0 and 424.1. While both versions
have identical software and outputs, the Model 424.1 includes a 4-20mA
output circuit.
Model 424 Accepts most frequency and pulse signals,
including mV outputs from turbine flowmeters,
and 2 wire proximity switch outputs. It also
enables all four front panel switches to be
remotely connected via the rear terminal strip.
The Model 424 has a scaled pulse output for driving
remote counters, together with a flow alarm output.
The instrument is fully programmable, with all calculation constants set via the
front panel switches and stored permanently in non-volatile memory.
This instrument is intended for fixed installation only, e.g. within a panel or
cabinet, and is not intended for desktop use.

424-M-V1.5
2 Introduction
This instrument conforms to the EMC-Directive of the Council of
European Communities 2014/30/EU, the LVD directive 2014/35/EU and
the following standards:
• EN61326:2013 Electrical equipment for measurement, control and
laboratory use – EMC requirements:
Residential, Commercial & Light Industry Environment & Industrial
Environment.
• EN61010:2010 Safety requirements for electrical equipment for
measurement, control, and laboratory use.
In order to comply with these standards, the wiring instructions in Section 7.1
must be followed.