MultiTrode MTRA-FSP User manual

MTRA
-
FSP Level Control Relay
Installation & Operation Manual

MTRA-FSP Installation & Operation Manual
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This Manual is the support documentation for the installation,
commissioning and operation of the MTRA-FSP Level Control Relay.
Document Revision 08
This revision: 27-July-2007
NOTICE
MULTITRODE® and MULTISMART® are registered trademarks of MultiTrode Pty Ltd in Australia, USA and
many countries worldwide. PUMPVIEW® is a registered trademark of MultiTrode Pty Ltd in Australia. Design
registration is pending for the MultiSmart Pump Controller Remote and Base Modules in Australia, USA and
many countries worldwide. Patents pending in Australia, USA and many countries worldwide.
©2007 MultiTrode Pty Ltd. This publication is protected by copyright. No part of this publication may be
reproduced by any process, electronic or otherwise, without the express written permission of MultiTrode Pty
Ltd.

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Contents
1 Warnings & Cautions 4
1.1 Information to User 4
1.2 Documentation Standards 4
1.3 Installation Notes 4
2 Introduction 5
3 Specifications 5
4 Installation 6
4.1 Power Supply 6
4.2 DIP Switch Settings 7
5 Operation Modes 8
5.1 Empty (Discharge) Mode 8
5.2 Fill (Charge) Mode 10
6 Alarms 12
6.1 Level Alarms (AL Probe) 12
6.2 Pump Alarms 12
7 Manual (Hand) and Off Inputs 14
7.1 Manual Operation of Pump (Hand) 14
8 Advanced Settings 15
8.1 Probe Sensitivity 15
8.2 Pump and Alarm Activation Delays 15
9 LED Status 16

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1 Warnings & Cautions
1.1 Information to User
Read through this manual to obtain a good working knowledge in order to get
maximum performance from the product for your application. After reading, put
the manual away in a safe place for future reference.
1.2 Documentation Standards
DANGER:
This symbol is used where non-compliance could result in injury
or death.
WARNING:
This symbol is used where non-compliance could result in
incorrect operation, damage to or failure of the equipment.
NOTE:
This symbol is used to highlight an issue or special case within
the body of the manual.
1.3 Installation Notes
WARNING:
The MTRA-FSP installation and wiring must be performed by
qualified personnel.
Danger:
The MTRA-FSP has no user serviceable parts. To reduce the
risk of electric shock, leave all servicing to qualified MultiTrode
technical staff.

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2 Introduction
The MTRA-FSP Level Control Relay is a solid-state electronic level control
module housed in a hi-impact plastic case with a DIN rail attachment on the
back. It is used to control pump relays in response to a liquid level sensor such
as a MultiTrode probe. A pump thermal sensor can be connected to the MTRA-
FSP for pump protection. During operation the LED indicators on the front panel
indicate the current status including – Pump On/Off, Thermal Fault, Probe Fault
and Level Alarm.
The MTRA-FSP level control relay is designed to be easy to install and
configure. All connections are clearly labelled on the side of the device and is
configured using a set of dip switches on the front panel.
3 Specifications
Dimensions
Width 22.5mm
Height 101mm
Length (depth) 120mm
Environmental
Ambient Temperature -10 to 60 degrees Celsius
Humidity 5% to 95% non-condensing
AC Power Supply
Voltage Range 85 – 265V AC
Frequency 50/60Hz
Power 3.5W
DC Power Supply
Voltage Range 12 – 30V DC
Current 0.15A max
Relay Outputs
Type Form A
Current (Resistive) 5A
Current (Inductive) 2A
Voltage Rating DC 30V DC
Voltage Rating AC 250V AC

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4 Installation
The MTRA-FSP is designed to be mounted onto a standard DIN rail. All power
supply, input and output connections are located on the top of the relay
housing.
4.1 Power Supply
The MTRA-FSP can be supplied power in the following ways:
•85 – 240V AC
•85 – 240V AC with 12 – 30V DC Backup
•12 – 30V DC Supply Only
A switch or circuit-breaker and an overcurrent protection device must be
included in the installation. The disconnection device must be in close proximity
to the equipment and within easy reach of the operator, and be marked as the
disconnecting device for the equipment. The input wiring and the switch/circuit-
breaker/overcurrent device must be rated to at least the nominal input voltage
being used. The recommended current ratings are as follows:
Unit Supply
Range
Recommended Switch/Circuit-
Breaker/Overcurrent Protection
Device Rating
Minimum Supply
Wiring Rating
85-180Vac 0.1A 0.1A
180-265Vac 0.05A 0.05A
12-20Vdc 0.3A 0.3A
20-30Vdc 0.15A 0.15A

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4.2 DIP Switch Settings
The MTRA-FSP is configured using the DIP switches located on the front of the
relay enclosure.
DIP # Setting Mode Description See Section:
OFF Empty (Discharge) Mode 5.1
1 ON Fill (Charge) Mode 5.2
OFF High Level Alarm 6.1
2 ON Low Level Alarm 6.1
OFF 0.5 sec Pump Activation and Deactivation
Delay 8.2
3
ON 10 sec Pump Activation and Deactivation
Delay 8.2
OFF Constant Alarm Output 6.1
4 ON Flash Alarm Output (1Hz) 6.1
OFF 0.5 sec Alarm Activation Delay 8.2
5 ON 10 sec Alarm Activation Delay 8.2
OFF NC Alarm Output 6.1
6 ON NO Alarm Output 6.1
7 8 Probe Sensitivity 8.1
OFF OFF 1kohm
ON OFF 4kohm
OFF ON 20kohm
ON ON 80kohm

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5 Operation Modes
The MTRA-FSP can be configured to operate in either Empty (Discharge) or Fill
(Charge) mode.
5.1 Empty (Discharge) Mode
Empty (Discharge) mode is used to pump liquid out of a well once it reaches a
preset level. In this mode the relay operates as follows:
•The pump activates when the liquid reaches the high level probe pump
activation delay period expires.
•The high level alarm probe will operate the Alarm Relay and also the
Pump Relay (in case the high level probe has failed).
•The pump will continue to operate until the liquid level drops below the
low level probe and the pump deactivation period expires.
•A thermal fault will deactivate the pump regardless of liquid level.
•A Probe Failsafe alarm will deactivate the pump regardless of liquid
level.
Note: Assumed Probe Faults:
If a High Level, or High Alarm input is activated and the Low Level probe
is deactivated, then the relay assumes the Low Level probe is faulty.
In this situation the pump will continue to run for 60 seconds after the
High Level and High Alarm inputs have deactivated. The Probe Fault
LED will turn ON to indicate an Assumed Probe Fault.

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5.2 Fill (Charge) Mode
Fill (Charge) mode is used to fill up a well with liquid when the level falls to a
preset level. In this mode the relay operates as follows:
•The pump activates when the liquid reaches the low level probe.
•The low level alarm probe will operate the Alarm Relay and also the
Pump Relay (in case the low level probe has failed).
•The pump will continue to operate until the liquid level rises to the high
level probe and the pump deactivation period expires.
•A thermal fault will deactivate the pump regardless of liquid level.
•A Probe Failsafe alarm will deactivate the pump regardless of liquid
level.
Note: Assumed Probe Faults:
If a High Level, or High Alarm input is activated and the Low Level probe
is deactivated, then the relay assumes the Low Level probe is faulty.
In this situation the relay will wait for 60 seconds after the High Level
input has deactivated, then start the pump. The Probe Fault LED will
turn ON to indicate an Assumed Probe Fault.

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6 Alarms
The MTRA-FSP has the following alarm inputs:
6.1 Level Alarms (AL Probe)
A conductive level sensor is connected to the AL Probe input to detect when the
liquid level has risen above or below an acceptable level.
•In Empty (Discharge) mode this will be a high level alarm and will
activate when the AL Probe input detects liquid and the activation
delay has expired.
•In Fill (Charge) mode this will be a low level alarm and will activate
when the AL Probe input is no longer detecting level (ie: the level has
dropped below the sensor) and the activation delay has expired.
When a level alarm is detected the Alarm contacts are activated and the Level
Alarm LED flashes. The Alarm contacts can be used to operate an alarm device
such as a light or siren.
The alarm output can be set to Normally Open (NO) or Normally Closed (NC)
using DIP Switch 6:
•NC alarm output (DIP Switch OFF)
•NO alarm output (DIP Switch ON)
The alarm output can be configured to toggle (to flash an alarm light for
example). This is set using DIP Switch 4:
•Constant alarm output (DIP Switch OFF)
•Flashing alarm output (DIP Switch ON)
6.2 Pump Alarms
There are two types of pump alarms supported by the MTRA-FSP – Thermal
and Seal.
6.2.1 Thermal Alarm Input
A pump thermal sensor can be wired into the Thermal input. This is used to
detect when the pump is overheating due to a blockage or other fault.
When a thermal alarm is detected the Thermal output contacts are activated
and the Thermal Fault LED flashes. The thermal alarm will also turn off the
pump if it is running. The pump will not be able to be switched on again until the
thermal alarm condition is cleared.

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6.2.2 Thermal Backup (BU) Input
The MTRA-FSP can be used as a backup pump control device for the
MultiSmart Pump Controller and RTU. When used as a backup, the Thermal
sensor is wired into the Thermal input, and the MultiSmart Thermal input is
wired into the MTRA-FSP Thermal BU input.
6.2.3 Failsafe Probe Alarm Input
MultiTrode probes can be sold with an extra connection to the top sensor for
failsafe detection. This is used to detect if the probe sensor cable has broken
by checking there is a circuit. If the cable is broken, there will be no circuit back
to the failsafe input and an alarm will be raised.
When a failsafe alarm occurs the Probe LED flashes and the Failsafe Alarm
output contacts are activated. Also the pump contacts will be deactivated so
the pump cannot run until the fault condition is removed.
NOTE:
If a non-failsafe probe is used then a jumper must be connected
between the Alarm Probe and Failsafe Inputs to prevent Probe
Fault Alarms occurring.
NOTE:
The failsafe probe input must be connected to the highest probe in
the system if used.
6.2.4 Assumed Probe Faults
If a High Level, or High Alarm input is activated and the Low Level probe is
deactivated, then the relay assumes the Low Level probe is faulty.
This condition is called an “Assumed Probe Fault”. The relay indicates this
condition by flashing the Level Alarm LED - single pulse on, 3s off.
The relay will also change its pumping behaviour to a timed method until the
fault condition is no longer present. See the assumed probe fault notes in
Sections 5.1 and 5.2.

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7 Manual (Hand) and Off Inputs
The MTRA-FSP can manually operate a pump using pushbuttons wired into the
Manual (Hand) input and the Off input.
7.1 Manual Operation of Pump (Hand)
Manual pump operation works as follows:
•Pushing the Manual (Hand) button will start the pump. The pump will
continue to operate until the Off button is pushed, regardless of level.
•After the Off input has been de-activated, the MTRA-FSP will revert
back to automatic operation.

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8 Advanced Settings
8.1 Probe Sensitivity
The MultiTrode Probe is a conductive level sensing device that relies on
conductivity through the liquid to earth in order to detect level. For most
common applications the default probe sensitivity setting of 20kohms will work
correctly.
The sensitivity can be changed using dip switches 7 and 8 if the sensitivity
needs adjustment to allow for different types of liquid.
DIP Switch
7 8
Sensitivity
OFF OFF 1 kohm
ON OFF 4 kohm
OFF ON 20 kohm
ON ON 80 kohm
8.2 Pump and Alarm Activation Delays
Activation delays are used to prevent spurious pump starts and level alarms.
The delay allows the level device to positively detect the liquid before operating
the pump or an alarm.
•Pump delays are set using DIP Switch 3.
•Alarm Delays are set using DIP Switch 5.
There are 2 delay periods:
•0.5 sec (DIP Switch OFF)
•10 sec (DIP Switch ON)

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9 LED Status
LED Status Indication
Power on Steady
Power Low voltage Flashing
Level Level alarm Flashing
Pump on Steady
Pump Activation delay period
(Not an alarm) Flashing
Thermal fault requires
manual reset Steady
Thermal
Thermal fault active Flashing
Assumed probe fault Steady
Probe
Failsafe alarm active Flashing
MultiTrode Pty Ltd—Head Office
Brisbane Technology Park
18 Brandl Street
PO Box 4633
Eight Mile Plains QLD 4113, Australia
Ph: [phone]
Fx: [phone]
E-mail: [e-mail]
MultiTrode Inc—USA
Suite 3/990 East Rogers Circle
Boca Raton, FL 33487, USA
Ph: [phone]
Fx: [phone]
E-mail: [e-mail]
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