Gelec PIT70000 User manual

User’s & Technical Manual – P/I LEVEL TRANSMITTER PIT7000
GELEC Industrial Electronics PAGE 1
P/I LEVEL TRANSMITTER
PIT70000
INDUSTRIAL ELECTRONICS

User’s & Technical Manual – P/I LEVEL TRANSMITTER PIT7000
GELEC Industrial Electronics PAGE 2
CONTENTS
1. PRECAUTIONS!..................................................................................................................................................3
2. MANUFACTURER WARRANTY, GENERAL TERMS AND CONDITIONS.....................................................4
3. DISPOSAL OF OLD ELECTRICAL & ELECTRONIC EQUIPMENT ...................................................................5
4. P/I LEVEL TRANSMITTER PIT7000..................................................................................................................5
5. GENERAL DESCRIPTION...................................................................................................................................6
6. FEATURES...........................................................................................................................................................8
7. PIT7000 OVERVIEW & CONFIGURATION ...................................................................................................11
8. PNEUMATIC SECTION ....................................................................................................................................13
9. INSTALLATION ................................................................................................................................................16
10. ELECTRICAL SECTION.....................................................................................................................................19
11. CALIBRATION PROCESS - DEFAULT SETTINGS ..........................................................................................24
12. DIMENSIONS ...................................................................................................................................................27
13. TECHNICAL SPECIFICATIONS........................................................................................................................28

User’s & Technical Manual – P/I LEVEL TRANSMITTER PIT7000
GELEC Industrial Electronics PAGE 3
1. PRECAUTIONS!
There are no serviceable parts inside the PIT7000 unit. Not to be opened by any
unauthorized person. Any repair, modification, or configuration of the device must be
carried out by the manufacturer, or a qualified service engineer familiar with the application.
Improper handling may result in serious personal injury and considerable material
damage. All connection and maintenance work must be carried out by qualified personnel.
RISK OF ELECTRIC SHOCK!
Use the correct voltage. The PIT7000 is designed for use
with specific voltage only. Connection to a different voltage
may cause fire, electric shock or other damage.
Do not touch the device and connection cabling with wet hands.
Disconnect the PIT7000 before cleaning it, to avoid the risk of electric shock.
Attempting to use a malfunctioning PIT7000 can be dangerous.
Do not block the enclosure ventilation slots of the PIT7000.
Keep liquids away from the PIT7000.
Spillage in the enclosure may result to fire, electric shock, or equipment damage. If a small
object or liquid falls/spills into the PIT7000 enclosure, unplug the unit immediately. Have
the unit checked by a qualified service engineer before using it again.
Set the PIT7000 in an appropriate location.
Do not install in a dusty or humid environment. Do not place it near heater, or air
conditioner. Keep it away from air, steam, extremely high/low temperature, or humidity.
Always follow the instructions given by the manufacturer and use the PIT7000
in accordance to its specifications.

User’s & Technical Manual – P/I LEVEL TRANSMITTER PIT7000
GELEC Industrial Electronics PAGE 4
2. MANUFACTURER WARRANTY, GENERAL TERMS AND CONDITIONS
Thank you for purchasing our product.
Our products have been manufactured with the latest technology, the highest quality
components and have gone through rigorous quality control tests at the factory, before
shipment. Make sure that the part number/type indicated on the identification label and
package corresponds to the part number/type of your order. After receiving the unit,
inspect it in order to ensure that no damage was caused during transportation.
GELEC and GELEC’s authorized distributors warrant to the original purchaser that the
product shall be free from defect in material and/or workmanship. The warranty period
begins on the purchase date (proof of purchase by invoice or delivery note) and is valid for
one (1) year.
In the event of malfunction during the warranty period, attributable directly to faulty
material and/or faulty construction and functional defects, GELEC and authorized
distributors will, at their option, either repair or replace the faulty product with the same or
similar model.
GELEC and authorized distributors shall have no obligation under this warranty, however, in
the following cases:
Any defect caused by freight damage, accident, disaster, faulty maintenance or
improper handling.
Any defect caused by modification, alteration, abuse, misuse, or incorrect installation.
Any defect of the product caused by improper repair by third party other than GELEC
and GELEC's authorized distributors.
Any incompatibility of the product with subsequent technical innovations or
regulations.
Any defect of the product caused by external equipment.
Any defect of the product on which the original manufacturer’s labeling has been
altered or removed.
In case of complaint please contact our company, or send the unit un-dismantled to your
local dealer. Any necessary replacement parts and necessary repair work are covered free of
charge.
All products are designed and produced by the manufacturer GELEC Co. LP to be in
compliance with the EU norms applying to them. GELEC is not responsible for direct or
indirect damages or malfunction caused by improper use or installation of the PIT7000.

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GELEC Industrial Electronics PAGE 5
3. DISPOSAL OF OLD ELECTRICAL & ELECTRONIC EQUIPMENT
This symbol, found on your product, indicates that this should not be
treated as household waste when you wish to dispose it.
It should be handed over to an applicable collection point for the
recycling of electrical and electronic equipment.
By ensuring this product is disposed of correctly, you will prevent
potential negative consequences to the environment and human
health, which could otherwise be caused by inappropriate disposal of this product.
The recycling of materials will help to preserve natural resources.
4. P/I LEVEL TRANSMITTER PIT7000
This operator's manual explains the functions and operation of the PIT7000. It also gives
some troubleshooting tips as well as general precautions to be taken when operating the
unit. In order to ensure the best performance and effective use of the PIT7000, we
recommend that you read the information in this manual carefully and follow the
instructions contained.
This manual is a complete guide for the PIT7000 with information on unit user maintenance,
unit installation and operational instructions. Do not touch parts of the PIT7000 that are not
referred in this manual. Keep this manual for immediate reference. It should help in solving
any operational questions you may have.
No part of this manual may be quoted, reproduced, stored in a retrieval system,
transmitted, transcribed or translated into any other language in any form or by any means,
electronic, mechanical, or otherwise, without prior written permission of “Gelec Co. LP”.
Although every effort has been made to ensure that this manual provides up to date
information, please note that the contents of this manual and unit specifications are subject
to change without notice.
Don’t forget to mention the exact type and version of
your PIT7000 whenever you contact the manufacturer,
asking for any further information. You can find this
information on the identification label of the unit.

User’s & Technical Manual – P/I LEVEL TRANSMITTER PIT7000
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5. GENERAL DESCRIPTION
The PIT7000 is an industrial, rangeable pressure transmitter, suitable for hydrostatic level
measurement in open or vented tanks. It converts the level-proportional hydrostatic
pressure to linear current and voltage signal standards (4-20, 0-20, 0-24mA / 0-5, 0-10V) for
further processing.
The two output signals can be utilized simultaneously or independently, while their
respective output range is selected through a dip-switch. PIT7000 zero and span settings
can be easily rescaled in order to meet the operating requirements of your application,
while factory default settings can be restored at any time.
The system requires the installation of a bubble tube submerged in the measured fluid,
properly connected to the transmitter with pneumatic tubes. A volume of compressed air is
constantly released into the fluid in a form of bubbles through the device’s airflow regulator
and the bubble tube. As the level changes, the backpressure measured by the transmitter’s
gauge pressure sensor is a direct level measurement.
The transmitter is isolated from the vessel’s area and includes a gauge type pressure sensor,
an airflow regulator with pneumatic adaptors, a calibration button and a status LED. It is
designed to be installed inside an electrical control panel, snapped onto commercially
available DIN mounting rails (NS32/NS35). The thermoplastic housing (Polyamide PA 6.6) is
suitable and approved for electronic devices and industrial environment.

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MAIN FEATURES
High measuring accuracy in industrial environment
Two analog outputs (mA/V)
Five signal standards available (4-20, 0-20, 0-24mA / 0-5, 0-10V)
Two pressure ranges available: 10kPa (100cm H2O) , 50kPa (500cm H2O)
0.35mm or 1.23mm resolution (H2O)
Pneumatic adaptors for 6/4 connection tubes
Status LED, calibration button, configuration dip-switch
Built-in adjustable air flow regulator
Factory calibrated to full pressure range
Simple and separate calibration of High and Low critical levels
Factory default settings can be restored
Error state recognition with relevant output signal
Temperature compensated gauge pressure sensor
Reliable and maintenance-free conductor connections
Protective circuit against reverse polarity
15-36 VDC / 1W max
DIN rail mounting (NS32/NS35)
ADVANTAGES OF BUBBLER SYSTEMS
Cost effective and proven operating philosophy
Transmitter and electrical connections are far from the tank in a protected area
Proper for high temperature applications and harsh industrial environment
Only the bubble tube material and the gas are exposed to the process
Measurement unaffected by foam, pH, conductivity and turbulence
Suitable for use with corrosive fluids
System does not include any moving parts

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6. FEATURES
PIT7000 VERSIONS
PIT7000 is provided in two versions with different pressure sensors, in order to meet a wide
range of level measurement application needs.
PIT7000-S1
PIT7000-S5
Operating pressure range
0-10 kPa (1.45 psi)
0-50 kPa (7.25 psi)
Factory calibrated level range (H2O) (1)
0-100 cm
0-500 cm
Sensor resolution (H2O)
0.35 mm
1.23 mm
1) Factory calibration has been made with water in ambient temperature. Values may differ when the
device is recalibrated under each application’s specific conditions and measured fluid.
TWO ANALOG OUTPUTS / FIVE OUTPUT RANGES AVAILABLE
PIT7000 provides two analog outputs (mA & V) which can be used either simultaneously, or
independently. There are five common output signal standards available, covering the
majority of process control applications.
The selection of the desired output range can be made from the internal configuration dip
switch (SW1/SW2/SW3). The available output ranges are the following.
mA output ranges :
4 - 20 mA , 0 - 20 mA , 0 - 24 mA
V output ranges :
0 - 10 V , 0 - 5 V
Each output range change, forces the device to properly reconfigure its output linearization.
Notice that the output signal cannot get values outside the selected range, even if the
application fluid exceeds the calibrated operating region.

User’s & Technical Manual – P/I LEVEL TRANSMITTER PIT7000
GELEC Industrial Electronics PAGE 9
SIMPLE CALIBRATION PROCEDURE / DEFAULT SETTINGS
PIT7000 standard versions (S1 and S5) are factory calibrated in order to exploit the
whole operating pressure range of their pressure sensor. So, the minimum output signal
of the selected output range is provided when the sensor is under atmospheric pressure
(bubble tube not submerged into fluid), while the maximum output signal is provided when
the sensor is under the maximum pressure of its pressure range.
The factory calibrated level ranges for water in ambient temperature are the following.
PIT7000-S1 : 0-100cm (0-10 kPa) , with resolution 0,35 mm (0,0005 psi)
PIT7000-S5 : 0-500cm (0-50 kPa) , with resolution 1,23 mm (0,0017 psi)
By following a simple calibration procedure, PIT7000 can be calibrated to provide its output
ranges in different pressure limits than the factory pre-calibrated ones. There is also the
option to restore the default factory calibration settings at any time, if needed. Refer to the
relevant section for more information.
TWO ERROR STATES - ERROR OUTPUT
PIT7000 is designed to detect and manage two Error states that are likely to occur.
As long as the device is in Error state, the STATUS LED indicates the problem and a
signal almost equal to power supply voltage (VPS-1V) is provided through the ERROR
OUTPUT for further utilization.
If the ERROR OUTPUT cannot be used due to application restrictions, there is the option to
get an error signal from the mA output as well. If you select one of the 4-20mA/0-20mA
ranges, the device can provide an ‘out of range’ 24mA signal, which can be recognized
as an error signal from the connected PLC. The output signal value (min or max) during an
Error state can be selected from the internal configuration dip-switch (SW4), depending on
the application needs. Refer to the relevant section for more information.

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ERROR 1 - STATUS LED FLASHING RED (3Hz)
Check the device for the following possible problems.
1) mA OUTPUT OPEN CIRCUIT
A simple way to confirm that you have an open circuit, is to cut power supply, disconnect
the external circuit from the mA output and short-circuit terminals #5 and #6 with a cable.
Turn on the power for a few seconds, the problem should be solved and the PIT7000 should
not be in Error state. Check the external circuit for disconnections.
Notice that if you are using only the V output, a 390Ωresistor must be connected at the mA
output (terminals #5 and #6). Consult the relevant connection diagram and confirm that
this resistor is properly connected.
2) HIGH LOAD RESISTANCE RL
The load resistance value connected to mA output (including line resistance), may be higher
than it should be. Refer to the relevant table and confirm that the externally connected
circuit has the proper resistance value.
3) INTERNAL OVERHEATING
Internal overheating is unlikely to occur and may be caused due to wrong electrical
connections, excessive temperature in the installation area, or PIT7000 hardware damage.
Confirm that all connections and installation environment meet the device specifications.
ERROR 2 - STATUS LED FLASHING RED (1Hz)
INTERNAL HARDWARE FAILURE, OR DAMAGED SENSOR DUE TO EXCESSIVE PRESSURE.
Check all electrical and pneumatic connections and ensure that you have a proper layout.
Disconnect/connect power supply. If this error remains, the device has a non-repairable
damage. Hardware failure or excessive applied pressure are the possible causes.
Before replacing the damaged device with a new one, ensure that any possible problem
that causes overpressure to the sensor (wrong connections/clogged pipes) is solved.

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7. PIT7000 OVERVIEW & CONFIGURATION
The PIT7000 is a complete pressure transmitter with 6 built-in connection terminals, an air
flow regulator with pneumatic adaptors, a calibration button, a configuration dip-switch
and a status LED. Its thermoplastic housing (Polyamide PA 6.6) is approved for electronic
devices in industrial environment. It is designed to be installed inside a vented electrical
control panel, snapped onto commercially available DIN mounting rails (NS32/NS35).
STATUS LED
The STATUS LED at the front side indicates various operational
stages of the PIT7000. Consult the following table for quick
reference and the relevant sections for detailed information.
LED COLOR
PIT7000 STATUS
GREEN
Device powered - Normal operation
FLASHING GREEN
High-Level calibration mode
FLASHING ORANGE
Low-Level calibration mode
GREEN/RED
Confirmation of calibration processes
FLASHING RED (3 Hz)
ERROR 1
FLASHING RED (1 Hz)
ERROR 2
OFF
Device not powered
CALIBRATION BUTTON
The calibration button is used in PIT7000 calibration process and
when the calibration settings need to be reset to default. Refer to
the relevant sections in this manual for more information.
AIR FLOW REGULATOR
The one-way air flow regulator controls the volume of air which
escapes the bubble tube. Having the recommended pneumatic
layout, you will find this airflow rate preset at approximately 3-4
bubbles per second. This is the recommended rate for a
controlled and constant stream of bubbles, which is important for consistent measurement.
The airflow adjustment can affect the device’s proper functionality and re-adjustments are
not recommended by a user which is not familiar with the device operation. However, if it is
necessary adjust the regulator with a flat screwdriver (clockwise for decreasing,
counterclockwise for increasing) and set the bubbles to the recommended rate. The front
label may block the regulator access, for unintended adjustments protection.

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CONFIGURATION DIP SWITCH
The internal 4-position dip-switch specifies the output range of the PIT7000 analog outputs
(mA/V) and their output value during ERROR state. Dip-switch adjustments must not be
done when the device is powered. Disconnect power supply, open the enclosure and
proceed to switch adjustments according to the information below. If there is not a dip-
switch inside your PIT7000 version, consider all switches being at OFF position.
SW1/SW2 switches (mA output range selection)
With SW1/SW2 switches you can select the mA output range at terminals #5(COM) / #6(+).
4 - 20 mA → SW1 : OFF , SW2 : OFF (default)
0 - 20 mA → SW1 : OFF , SW2 : ON
0 - 24 mA → SW1 : ON , SW2 : OFF
--- Do not set both SW1/SW2 to ON ---
This setting is used only in manufacturing stages and can lead to device malfunction.
SW3 switch (Voutput range selection)
With SW3 switch you can select the Volt output range at terminals #5(COM) / #4(+).
0 - 10 V → SW3 : OFF (default)
0 - 5 V → SW3 : ON
SW4 switch (Output value during ERROR state)
With SW4 switch you can select the output value during ERROR state, according to the
selected output range. Refer to the ERROR section in this manual, for more information
about the possible errors.
4-20mA
0-20mA
0-24mA
0-10V
0-5V
SW4 : OFF (default)
4 mA
0 mA
0 mA
0 V
0 V
SW4 : ON
24 mA*
24 mA*
24 mA
10 V
5 V
*You can exploit the ‘out of range’ 24mA output for ERROR recognition from your PLC,
when the dedicated ERROR OUTPUT cannot be used due to application restrictions.
This is an actual advantage only for 4-20mA / 0-20mA ranges. For the rest of the ranges the
output value options are within the measuring range and cannot be utilized. Though, you
can choose between minimum and maximum output, according to your application needs.

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8. PNEUMATIC SECTION
GAUGE PRESSURE SENSOR
PIT7000 includes a gauge type, silicon piezoresistive pressure sensor, providing an accurate
and linear output directly proportional to the applied pressure. On-Chip Temperature
Compensated & Calibrated, this sensor is laser trimmed for precise Span, Offset calibration
and temperature compensation.
Having a gauge pressure sensor, the PIT7000 uses the atmospheric pressure as a
reference. This means that it must be installed in a vented electronic panel in order to have
the same pressure conditions with the measured tank, which is open/vented by default.
PNEUMATIC ADAPTORS
PIT7000 has three straight male pneumatic adaptors for 6/4 connection tubes.
The (P) adaptor is the input of the internal air flow regulator and is used for the
compressed air supply. Provide an invariable pressure, higher than the hydrostatic pressure
of the tank. A recommended pressure value would be approximately 1.5 bar (22 psi).
The (O) adaptor is the output of the internal air flow regulator towards the bubble tube.
Refer to the ‘Airflow Regulator’ section in this manual, for bubble adjustment information.
The (S) adaptor is the input of the internal pressure sensor which measures the hydrostatic
pressure. Check the pressure limits of your PIT7000 version before any connection.
Excessive applied pressure can cause permanent damage, or degradation to the sensor.

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BUBBLE TUBE
A thin tube should be firmly installed in the tank with its nozzle
submerged in the measured fluid. A small volume of air is
provided to this tube through the device’s airflow regulator
and connection pipes, escaping into the fluid in a form of
bubbles. The device measures the hydrostatic pressure at
the point where the bubbles are released.
At the bottom side, the tube’s nozzle must have a smoothed
V-notch, in order to assist the release of a controlled and
constant stream of small bubbles (3-4 per second). This is
preferable for consistent measurement, rather than
intermittent large bubbles.
On the top side, a T-shaped fitting is needed to connect the
6/4mm tubes which lead to (S) and (O) adaptors of the
PIT7000.
Use standard and compatible pneumatic parts, which meet the
operating requirements of the application regarding pressure,
temperature, safety etc.
The top of the tube must be at least 25cm above the
fluid’s highest possible level, for avoiding fluid suction
towards connection tubes and PIT7000 after air supply cut-
off.
In order to have unaffected measurement, it is very
important to prevent air leakage in all pneumatic
connections. Use an appropriate thread sealant in all
threaded elements.
In a common level measurement application, the tube is installed almost at the bottom of
the tank. Ensure that the provided air can escape freely into the fluid and the nozzle is
not blocked by the tank body or possible sediment/dirt during operation. Partial blockage
of the nozzle will cause faulty readings and full blockage will lead the compressed air
supply directly to the pressure sensor and damage it.
Do not install the tube deeper than your PIT7000 version allows. The excessive applied
pressure can cause permanent damage or degradation to the device’s pressure sensor.

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CONNECTION TUBES
The adaptors are suitable for 6/4mm tubes and the supported types are PA6, PA11, PA12,
Polyurethane, Polyethylene, PTFE and FEP. Ensure that the tubes meet the operating
requirements of your application (pressure, temperature, safety etc.).
To assembly, insert the tube on the nut, thread the tube on the fitting cone and tighten the
nut by hand, or with a spanner.
Ensure that pipes are smoothly curved and not bended at all points. Piping layout should
remain sufficiently protected from possible bending, blockage, tear, corrosion, or any
damage that would affect the device’s functionality.
Maintain the pneumatic circuit in good condition. Polluted air, dust, oil etc. inside the
circuit may gradually affect the measurement, clog up the pipes, or even damage the
device’s pressure sensor.
Any air leakage along the (S) / (O) piping will affect the measurement.

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9. INSTALLATION
In this section, you can find useful information that have to be taken under consideration
during PIT7000 installation. Always follow the recommended instructions and use the
PIT7000 in accordance to its specifications.
INSTALLATION AREA
Having a gauge pressure sensor, the PIT7000 uses
the atmospheric pressure as a reference. This
means that it must be installed in an electronic
panel under atmospheric pressure, in order to be
under the same pressure with the measured tank,
which is open/vented by default. Keep the unit
protected from steam, flame, extremely high or low
temperature and humidity. Do not block the
ventilation slots above and below the unit. Fluid
insertion into housing may cause damage, electric
shock or fire.
In the back side of PIT7000, there is a clip for the mechanical mounting (lock) on an Ω-type
mounting rail (DIN NS32/NS35), with the release hook at the bottom. The device should
have at least 60mm free space below it for the air pipes and 15mm on top of it, for the
wires. Ensure that the connected pneumatic tubes are smoothly curved and not bended.
PNEUMATIC CIRCUIT
Pneumatic layout must be sufficiently protected from possible bending, blockage, tear,
corrosion, or any damage that would affect the device’s functionality. Polluted air, dust, oil
etc. inside the circuit may gradually affect the measurement, clog up the pipes, or even
damage the device’s pressure sensor. Check the pneumatic circuit periodically and
clean/replace the pipes if necessary. Use standard and compatible pneumatic parts, which
meet the requirements of the application regarding pressure, temperature, safety etc.
In order to prevent fluid suction towards piping and PIT7000 after air supply cut-off, the
top side of the bubble tube must be at least 25cm above the fluid’s highest level.
Additionally, you can install the device at a point higher than your tank. If somehow fluid
suction occurs, disconnect the (S) tube from PIT7000, clean it and confirm that the device
works properly before using it again.

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BUBBLE TUBE - APPLICATION TANK
The measured level corresponds to the upright distance between the bubble tube’s
V-notch vertex and the fluid level. This means that if the device has the default factory
calibration, the V-notch must be installed at the point you need the transmitter’s minimum
output. For example, in a common application this point is usually the bottom of the tank.
After the tube installation, confirm that bubbles are released from the V-notch and not
from another point of the nozzle. The provided air volume must escape freely into fluid,
with the nozzle not being blocked by the tank body, or possible sediment/dirt. Partial
blockage may cause faulty readings and full blockage will lead the air supply directly to the
sensor and damage it. In case of tanks with sediments, install the tube at a higher point (so
the bubble stream is not affected) and consider this elevation as an offset.
With an invariable pressure of 1.5 bar, possible bubble discontinuance doesn’t mean airflow
adjustment malfunction. It may be caused by blockage, or air leakage along piping. Inspect
(S) and (O) adaptors and piping for possible damages.
Even if the bubble tube is not submerged into fluid, long distance tubing or other factors
in installation may rise a small amount of pressure to the sensor, causing a small output
offset. Re-calibrating Low Level will solve the issue, refer to the relevant section.
PIT7000 has a gauge pressure sensor which uses the atmospheric pressure as a reference.
Therefore, the application tank must be open or vented and the measured fluid
constantly under atmospheric pressure.
The shape of the tank must allow a linear relationship between the fluid volume and the
measured level. Otherwise a proper software must be developed, which will automatically
calculate the filled volume of the tank, depending on the output of the transmitter.
Pneumatic Layout example

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GELEC Industrial Electronics PAGE 18
APPLICATION FLUID
The application fluid has to be homogenous, having the same density at all points of its
volume and with relatively low viscosity, in order to allow a controlled and constant stream
of bubbles through it. For example, honey is not an appropriate fluid for this measuring
method. In addition, the fluid cannot be sensitive to a gas bubbling through it.
PIT7000 standard versions are factory calibrated with water in ambient temperature,
exploiting the whole operating pressure range of their pressure sensor (1m of water in
PIT7000-S1 / 5m of water in PIT7000-S5), unless otherwise stated on the product label. So,
the level which generates the maximum output signal corresponds to the maximum
pressure that your version can handle.
Hydrostatic pressure is affected from factors that cannot be easily specified (fluid/solution
density, temperature, gravitational acceleration etc.). In order to define the maximum
level of your application’s specific fluid, after having all electric and pneumatic
connections finalized, you can follow the procedure below.
Gradually fill the tank with the application fluid, while measuring the output signal.
When you reach maximum output (e.g. 20mA in 4-20mA range), stop the filling.
✓This level is the maximum level that this specific fluid should reach during any
process stage. Higher level than that, will expose the PIT7000 sensor beyond its
operating pressure range.

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10. ELECTRICAL SECTION
ELECTRICAL CONNECTIONS
The PIT7000 housing is equipped with 6 connection terminals, two triple screw terminal
blocks per side (top & bottom).
The terminal blocks are manufactured to provide resistance to stress corrosion cracking,
electrolytic corrosion, rusting and screw loosening in case of vibrations. This way, conductor
connections are maintained reliable and maintenance-free in harsh industrial environment.
The conductor’s stripping length should be 8 mm, with its cross-section within the
following ranges (depending on type). The recommended tightening torque is 0.5 - 0,6 Nm.
Clamp all types of copper cables without pre-treatment. Do not solder the conductors, as it
affects the proper connection quality. Two conductors with the same cross section make
contact safely in the clamping parts. If necessary, copper ferrules can be used as a
protection against splicing when stranded conductors are wired. In general terms, ensure
that you are having reliable mechanical connection and electrical contact.
Rigid solid :
0,2 - 4,0 mm2
Flexible stranded :
0,2 - 2,5 mm2
AWG :
24 - 12

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CONNECTION TERMINALS
Read carefully the following information and refer to the connection diagrams and technical
data, regarding proper wiring of the PIT7000 with the associated equipment.
Confirm that you have proper connections before unit operation. Wrong connections may
lead to permanent device or external equipment damage. Don’t proceed to any connection
modification, while the unit is powered.
TERMINALS #2 - #3 (POWER SUPPLY - VPS)
Connect the power supply (15-36 VDC) to terminals #2 (+) and #3(-).
Maximum power consumption is approximately 1W. There is not an electrical safety fuse in
the internal power circuit. Although there is polarity protection, ensure that you are
applying proper voltage and polarity.
TERMINALS #1 - #3 (ERROR OUTPUT)
Terminals #1 (VPS -1V)and #3 (COM) provide the Error output signal during operation.
An internal High Side Driver provides a voltage output signal during ERROR state, almost
equal to power supply voltage (VPS -1V).
The output current limit is 500mA, while the Current Limit Initial Peak is 3A max.
If you don’t need this output, leave the relevant terminals unconnected. Refer to the
relevant section in this manual for more information.
TERMINALS #4 - #5 (V OUTPUT SIGNAL)
Terminals #4 (VOUT)and #5 (COM) provide the Voltage output signal during operation.
The output range (0…5V / 0...10V) can be selected from the internal configuration dip
switch. Refer to the relevant section in this manual for more information.
The output continuous current limit is 10mA, with an overcurrent protection of 30mA max.
If you are going to use the V OUTPUT without using the mA OUTPUT, you must connect a
390Ωresistor to the mA OUTPUT (terminals 5-6). Check the relevant connection diagram.
For having the signal unaffected from any interference, it is recommended to use a shielded
cable with twisted pair, properly grounded at the side of the signal receiving device.