Burkert 8175 User manual

8175 / 8170
ULTRASONIC LEVEL TRANSMITTER
COMPACT AND SEPARATE VERSIONS
Instruction Manual

28175
ENGLISH
INTRODUCTION
1 INTRODUCTION
1.1 Symbol Used..................................................................................................................................................3
1.2 General Safety Instuctions .............................................................................................................................3
2 QUICKSTART
2.1 Installation ......................................................................................................................................................4
2.2 Programming
2.2.1 Distance ............................................................................................................................................6
2.2.2 Level .................................................................................................................................................7
2.2.3 Volume ..............................................................................................................................................8
2.3 Testing............................................................................................................................................................9
3 INSTALLATION
3.1 General Installation guidelines .....................................................................................................................10
3.2 Installation ....................................................................................................................................................12
3.2.1 Panel version installation ................................................................................................................12
3.2.2 Wall mounted version installation....................................................................................................12
3.3 18-32 VDC electronic card identification ......................................................................................................13
3.4 General Electrical Connection ....................................................................................................................13
3.4.1 8175 Compact version with a DIN43650 connector........................................................................14
3.4.2 8175 Compact version ....................................................................................................................15
3.4.3 8175 Panel version .........................................................................................................................17
3.4.4 8175 Wall mounted version, 18-32VDC.......................................................................................... 18
3.4.4 8175 Wall mounted version, 115/230 VAC......................................................................................20
3.5 Easy Link Connections ................................................................................................................................21
4 PROGRAMMING AND OPERATION
4.1 Operating and Control Guide .......................................................................................................................25
4.2 Menu Guide .................................................................................................................................................26
4.3 Main Menu ...................................................................................................................................................27
4.4 Calibration Menu ..........................................................................................................................................28
4.4.1 Language ........................................................................................................................................29
4.4.2 Engineering Units............................................................................................................................29
4.4.3 Filter Function .................................................................................................................................31
4.4.4 Gas Characteristics.........................................................................................................................34
4.4.5 Echo filtering ...................................................................................................................................35
4.4.6 Teach-In procedures
4.4.6.1 Teach-In for Level and distance .........................................................................................37
A - 1 or 2 point Level or Distance Teach-In procedure.........................................................38
B - Resetting of the Distance Reference point ....................................................................39
4.4.6.2 TEACH-IN FOR VOLUME ..............................................................................................40
C - Input of tank dimensions ................................................................................................40
D- Manual input of distances and associated volumes .......................................................42
E- Volume teach-In procedure ............................................................................................44
4.4.7 Output Current ...................................................................................................................................46
4.4.8 Relay (option).....................................................................................................................................47
4.4.8.1 Relay 1 ............................................................................................................................48
4.4.8.2 Relay 2 ............................................................................................................................49
4.5 Test Menu ....................................................................................................................................................50
4.5.1 Offset Compensation .................................................................................................................... 51
4.5.2 Span Compensation .......................................................................................................................51
4.5.3 Temperature adjustment .................................................................................................................52
4.5.4 Strength of return signal..................................................................................................................52
4.5.5 Simulation of the level or temperature ............................................................................................53
4.5.6 Resetting of the transmitter .............................................................................................................54
4.6 8175 Settings ..............................................................................................................................................55
4.6.1 Factory Settings ..............................................................................................................................55
4.6.1 User Settings ..................................................................................................................................55
5 MAINTENANCE
5.1 Storing and cleaning of the sensor ..............................................................................................................56
5.2 Trouble shooting guide.................................................................................................................................56
6 ANNEX
6.1 Specifications ...............................................................................................................................................58
6.2 Horizontal cylindrical tank value conversions ..............................................................................................60
6.3 Dimensions ..................................................................................................................................................61
6.4 Design and Measuring Principle ..................................................................................................................64
6.5 Standard delivery .........................................................................................................................................64
6.6 Type specification ........................................................................................................................................65
6.7 Label type 8175 ...........................................................................................................................................66
6.8 Spare parts list .............................................................................................................................................66

3
8175
ENGLISH
INTRODUCTION
1.1 SYMBOL USED
Indicates information which must be followed. Failure to follow the
information could endanger the user and affect the function of the device.
1.2 GENERAL SAFETY INSTRUCTIONS
Before installing or using this product, please read this manual and any
other relevant documentation to ensure you fully benefit from all the
advantages the product can offer.
●Please verify that the product is complete and free from any damage.
(see reference table section 6.8).
●It is the customer's responsibility to select an appropriate transmitter for the
application, ensure the unit is installed correctly, and maintain all components.
●This product should only be installed or repaired by specialist staff using the
correct tools.
●Please observe the relevant safety regulations throughout the operation,
maintenance and repair of the product.
●Always ensure that the power supply is switched off and the pipes / tank do not
contain any pressure before working on the device / system.
●If these instructions are ignored or the transmitter is not used according to the
specifications, no liability will be accepted and the guarantee on the device and
accessories will become invalid.

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QUICKSTART
2.1 INSTALLATION
Pay attention to the installation of the transmitter to ensure the proper
operating of the device.
Select the mounting position by respecting the following instructions:
Protect the device against bad weather and temperature changes:
This section provides a comprehensive installation and operation guide which will
assist with the commissioning of the 8175 Level Transmitter.
min. 30 cm
HH
≅ R/2 ≅ R/2
min. 30 cm
Mounting on a closed tank
min. 30 cm
HD
Mounting on a shaft
D (mm) 65 80 100
H (mm) 100 250 400
Protection when installed outside

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QUICKSTART
Select the
mounting position
Have you
a separate
version?
Have you
a cable plug
version?
Connect power
supply cable
Connect output
cable
Reassemble
housing or plug
Turn on the
power
Distance
displayed
coherent?
Program the transmitter
Yes No
See section 3.4
Unscrew the plug
screws and open Unscrew the 4
screws and open
Install the unit
on the fitting Check electrical connection
See section 3 and
the page opposite
Yes
Ensure that security
provisions are considered
with the power cable and
relay circuit.
Pay attention to the max.
permitted load of the
output current loop.
If the unit does not work,
See section 5.2
Ensure the power supply
is switched on. See
Maintenance.
See the next page .
Ensure the power supply
is disconnected before
starting work.
Connect the
sensor cables
Yes
No
For panel versions move to
the next step.
No

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QUICKSTART
Choose filters 0-2 if no echo filtering
of obstructing obstacles is required
and filters 3-9 if echo filtering is
required.
Typically 331.4 m/s within the air
with a deviation of 0.59m/s/°C.
To determine a new zero point and
sound velocity.
For ex. 4mA -> 100cm
and 20mA -> 250cm
2.2 PROGRAMMING
The electronics within the 8175 ultrasonic level transmitter allows the unit to be
configurated as either distance, level or volume depending on the application.
To access the CALIBRATION MENU simutaneously press for 5 seconds.
●The ‘Enter‘ key can be locked to avoid accidental or unauthorised access
- section 3.3.
●Reference can additionally be made to the menu guide - section 4.2.
2.2.1 PROGRAMMING - DISTANCE
ENTER
Choose the
desired language
Select the desired
units
Select the desired
filter
Enter the
Sound velocity
Perform a Teach-In
procedure
Enter the current
output range
Configure relays
1 & 2 (If available)
Measurement or Simulation (optional)
See section 4.4.1
See section 4.4.2
See section 4.4.3
See section 4.4.4
See section 4.4.6
See section 4.4.7
See section 4.4.8
See section 2.3

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8175
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QUICKSTART
To access the CALIBRATION MENU simutaneously press for 5 seconds.
●The ‘Enter‘ key can be locked to avoid accidental or unauthorised
access - section 3.3.
●Reference can additionally be made to the menu guide - section 4.2.
2.2.2 PROGRAMMING - LEVEL
The actions which are highlighted in grey must be fully completed for accurate
measurement.
Choose filters 0-2 if no echo
filtering of obstructing obstacles is
required and filters 3-9 if echo
filtering is required.
331.4 m/s within the air with a
deviation of 0.59m/s/°C.
To determine new reference points.
For ex. 4mA -> 0.00 m
and 20mA -> 8.50 m
ENTER
Choose the
desired language
Select the desired
units
Select the desired
filter
Enter the
Sound velocity
Perform a Teach-In
procedure
Enter the current
output range
Configure relays
1 & 2 ( if available )
See section 4.4.1
See section 4.4.2
See section 4.4.3
See section 4.4.4
See section 4.4.6
See section 4.4.7
See section 4.4.8
Measurement or Simulation (optional)
See section 2.3

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QUICKSTART
To access the CALIBRATION MENU simutaneously press for 5 seconds.
●The ‘Enter‘ key can be locked to avoid accidental or unauthorised
access - section 3.3.
●Reference can additionally be made to the menu guide - section 4.2.
●It is important to exit the menu calibration after entering the desired
distance units and re-enter the menu to configure the volume units.
2.2.3 PROGRAMMING - VOLUME
The actions which are highlighted in grey must be fully completed for
accurate measurement.
ENTER
Choose the
desired language
Select the desired
distance units
Quit this menu
and re-enter
Select the desired
volume units
Select the desired
filter
Enter the
Sound velocity
Perform a Teach-In
procedure
Enter the current
output range
Configure relays
1 & 2 ( if available )
See section 4.4.1
See section 4.4.2
See section 4.4.2
See section 4.4.3
See section 4.4.4
See section 4.4.6
See section 4.4.7
See section 4.4.8
Measurement or Simulation (optional)
See the next page.
It is imporant to quit this
calibration menu and re-enter
after entering the distance
units to ensure correct
measurement.
Choose filters 0-2 if no echo filtering
of obstructing obstacles is required
and filters 3-9 if echo filtering is
required.
331.4 m/s within the air with a
deviation of 0.59m/s/°C.
For ex. 4mA -> 1.2m3
and 20mA -> 10.6m3

9
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ENGLISH
QUICKSTART
To access the TEST MENU simutaneously press for 5 seconds.
2.3 TESTING
ENTER
Control of
4 mA
Control of
20 mA
Adjustment of the
temperature
Display of the
signal strength
Simulation of
the outputs
Reseting of the
stored parameters
The unit is now ready
The mode Offset fixes the output
current of 4mA. (optional)
The mode Span fixes the output
of 20mA. (optional)
Verify the real temperature is near
to that of the measured
temperature. (optional)
Orient the transmitter to obtain
the highest signal strength.
This is optional although it is
recommended for commissioning
large systems.
See section 4.5.1
See section 4.5.2
See section 4.5.3
See section 4.5.4
See section 4.5.5
See section 4.5.6
0......9

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INSTALLATION
3.1 GENERAL INSTALLATION GUIDELINES
Prior to the installation of the 8175 ultrasonic level transmitter, a clear mounting
location for the product must be determined.
●The level transmitter or sensor 8175 / 8170 are designed for
liquid level measurement. It is the user‘s responsability to test the
functionality of the device for any other material such as powders,
granuals etc.
●The 8175 ultrasonic level transmitter or sensor must be installed
perpendicular to the process medium.
●Always protect the transmitter from the rain, ultraviolet radiations
and electromagnetic perturbations.
Tanks with bulged or cone-shaped roofs
Mounting on a shaft
Beam cone
min. 30 cm
H
≅ R/2
D
R
D (m) R (cm)
130
260
380
4 100
5 110
6 120
7 130
8 135
9 140
10 140
8°
Do not install the transmitter at the center
of a bulged or cone-shaped roof but at half-
radius from the center.
H: see table hereafter.
For the mounting on a shaft:
- respect the max. shaft length:
- burr the inside of the shaft.
The ultrasonic pulses are emitted from the
base of the transmitter with an 8°beam
angle.
Suppress all the obstacles inside the beam
cone to avoid false echos.
D
H
D
H
D (mm) 65 80 100
H (mm) 100 250 400

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8175
ENGLISH
INSTALLATION
Obstacles inside the tank
Rough-surface liquids or liquids which can foam
60°
min. 80 mm
min. 30 cm
The fixed obstacles inside the tank may
generate false echos.
Ensure there is no obstacle within the beam
cone.
If this is impossible, mask the obstacles by
means of deflectors or use a meter tube as
for the rough-surface liquids (see hereafter).
When the tank filling-up generates waves or
foam, extend the meter tube as far as under
the surface of the liquid.
A meter tube makes it also possible to have
stable measurements. It makes it possible to
ignore the obstacles inside the tank.
The meter tube cannot be used with
clogging products.

12 8175
ENGLISH
INSTALLATION
3.2 INSTALLATION
The ultrasonic transmitter or sensor may be installed through the tank top via a
standard G 2“ (NPT) fitting or equivalent tapped flange according to the type of level
transmitter.
Steps for successful installation:
●When securing the transmitter or sensor to the fitting, only
tighten by hand!
●Be careful not to overtighten the transmitter in the fitting.
3.2.1 PANEL VERSION INSTALLATION
For installation and insertion of the panel version follow the instructions on the
enclosed delivery film, the self-adhesive pattern to cut the panel and as follows:
1. Put gasket 2on the cover 1and place the complete unit in the cut-away panel.
2. Screw the spacer bolts 3onto the panel fixing screws 4.
3. Insert the cable clips 8, to secure the various cables (power supply, outputs,
sensor) of the transmitter, onto the plate 5.
4. Fasten the plate 5with the screws 7onto the bolts 3, tightening the locking
washers 6.
The level transmitter in a wall-mounted version has 4 fixing holes at the corners of the
enclosure. Remove the white blanking strips and the cover to access to fixing holes 1.
3.2.2 WALL-MOUNTED VERSION INSTALLATION
1
1
1
1
-+
4321
1
2
3
4
3
4
56
67
7
8

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8175
ENGLISH
INSTALLATION
3.3 18-32 VDC ELECTRONIC CARD IDENTIFICATION
●The Coax cable and PT1000 connections must be connected in all
cases to ensure the device functions correctly.
●The k e y can be locked to avoid accidental or unauthorised
access by placing SW1 in the left position in the diagram above.
3.4 GENERAL ELECTRICAL CONNECTION
●Use cables with a temperature limit of 80°C minimum.
●For normal operating conditions the measuring signal can be transmitted by a
simple cable of 0.75 mm2 cross section.
●The line must not be installed in combination with carrying lines with a higher
voltage or frequency.
●If a combined installation cannot be avoided, a minimum space of 30 cm (1 ft)
or shielded cables should be adopted.
●When using shielded cables observe faultless grounding of the shield.
●The cable diameters for the cable gland versions must respect the following:
Compact: between 6-12mm and 6 mm with a multiway seal
Wall mounted: between 4-8mm (not used cable glands must be blanked off).
SW 2 - Sourcing or
sinking configuration.
Terminal connections -
Connection of power supply
of 18-32VDC and 4-20mA
output.
SW 1 - Locking of the
‘Enter‘ key to avoid
accidental or
unauthorised access
to the calibration and
test menus.
Sensor Coax cable
connection.
PT1000 connection.
Relay connections -
Connection of relays
1 & 2 (optional).
-+
4321
ENTER
Locked Unlocked
ENTER

14 8175
ENGLISH
INSTALLATION
-+
4321
1
32
+-
DIN43650
(*)
●In case of doubt, always use shielded cables.
●The power supply must be regulated - section 6.1.
●Do not open and wire the transmitter with the power supply
connected.
●It is obligatory to put security devices close to the transmitter, on :
Power supply : 18-32VDC - 250mA fuse and interrupter
115/230VAC - 5A fuse and a bipolar interrupter
Relay : 3A fuse max. and a bipolar interrupter
(depending on the application).
●Do not apply both a dangerous voltage and a very low safety
voltage to the relays.
3.4.1 8175 COMPACT VERSION WITH A DIN43650 CONNECTOR
WIRING
1
2
3
4
5
1.To open the connector remove screw 1
(Fig. 3.3).
2.Remove the internal part 3from the
external casing 2.
3.Connect the transmitter according to the
pin assignment in Fig. 3.3
4.When re-assembling, the internal part 3
can be rotated in 90°steps to a desired
position before inserting back into the
casing 2.
5. Tighten the cable gland 5. Then place
gasket 4between the DIN43650
connector and the fixed connector of the
transmitter and plug the DIN43650
connector onto the transmitter.
6. Tighten screw 1.
Fig. 3.3 Plug assembly
I (4-20 mA output)
Orange
Red Black
Brown
Green/
Yellow
To the earth lug
of the housing Power supply
+ (L+; 18-
32 VDC) - (L-)
To position
SW2, see 3.4.2,
compact
version with
cable gland
(*) If direct earthing is
impossible, connect a
100 nF/50 V-
condensator between
the negative terminal of
the power supply and
the earth.

15
8175
ENGLISH
INSTALLATION
4-20 mA
+
-
18-32 VDC
+
-
250 mA
I
-+
4321
(*)
4-20 mA
+
-
18-32 VDC
250 mA
I
-+
4321
+
-
(*)
4-20 mA
18-32 VDC
250 mA
3A
m
24VDC
115/230 VAC
3A
-+
4321
REL1
REL2
+
-
(*)
PLC/control
valve or
positioner
SW 2,
Position A SW 2,
Position B
Fig. 3.7 Pin assignment for relays
PLC/control
valve or
positioner
ENTER
Locked Unlocked
SW1
SW 1
ENTER
Locked Unlocked
OR
3.4.2 8175 COMPACT VERSION
WIRING OF THE 18-32 VDC VERSION, WITH CABLE GLAND
Remove the cover via the screws on the front display and pull the cable through the
cable gland and wire according to one of the pin assignment diagrams below.
The electronics within the 8175 allows a sourcing or sinking PLC to be connected.
Position A (Fig 3.5) provides a sourcing configuration and Position B (Fig 3.6) a
sinking configuration.
Fig. 3.5 Pin assignment, Position A Fig. 3.6 Pin assignment, Position B
RELAY CONNECTION OF THE 18-32 VDC VERSION, WITH CABLE GLAND
The electrical wiring of this model is possible via the use of 2 cable glands. Remove
the cover via the screws on the front display and pull the cables through the cable
glands and wire according to pin assignment diagram below (Fig. 3.7).
●The device can be easily connected to a PLC independently of the respective
version.
●The ‘Enter‘ key can be locked by placing the SW 1 swich into the left position to
avoid accidental or unauthorized access.
(*) If direct earthing is
impossible, connect a
100 nF/50 V-
condensator between
the negative terminal of
the power supply and
the earth.

16 8175
ENGLISH
INSTALLATION
N
L1
+
-
-+
4321
115/230 VAC
N
L1
REL1
REL2
N
L1
+-
-+
4321
115/230 VAC
N
L1
REL1
REL2
WIRING OF THE 115/230 VAC VERSION
Remove the cover via the screws on the front display and pull the cable through the
cable gland and wire according to one of the pin assignment diagrams below.
The electronics within the 8175 allows a sourcing or sinking PLC to be connected.
Position A (Fig 3.5) provides a sourcing configuration and Position B (Fig 3.6) a
sinking configuration.
●Do not open and wire the transmitter with the power supply
connected.
●Ensure that the power supply switch is selected for the appropriate
voltage 115VAC or 230 VAC.
The connection for relays 1 and 2 are identical to that of the 18-32VDC on the
previous page.
Fig. 3.8 Pin assignment, Position A Fig. 3.9 Pin assignment, Position B
SW 2,
Position A SW 2,
Position B
Fuse - 5A Fuse - 5A
PLC/control valve/
positioner 4-20mA PLC/control valve/ positioner 4-20mA
Power Supply
switch
Fuse - 250 mA T Fuse - 250 mA T
Red wire
Black wire
Green&yellow
wire
Red wire
Black wire
Green&yellow
wire

17
8175
ENGLISH
INSTALLATION
8175 PANEL VERSION 18-32VDC, WIRING
Open the cabinet/cupboard and wire according to the pin assignment diagrams below.
The electronics within the 8175 allows a sourcing or sinking PLC to be connected.
Position A (Fig 3.11) provides a sourcing configuration and Position B (Fig 3.12) a
sinking configuration.
Fig. 3.11 Pin assignment, Position A Fig. 3.12 Pin assignment, Position B
3.4.3 8175 PANEL VERSION 18-32VDC
CONNECTION OF THE 8170 SENSOR
●Pass the cable through the wall / panel and use the cable gland to secure the cable.
●Connect the coax and PT1000 temperature cables as shown in the diagram below.
●Secure all the cables onto the protection plate as indicated via the 2 plastic ties
provided.
PT1000
Coax
Secure the cables
onto the protection
plateusingtheplastic
ties
Fig.3.10 Panel cable
connections
4-20 mA
+
-
18-32 VDC
+
-
250 mA
I
-+
4321
(*)
4-20 mA
+
-
18-32 VDC
250 mA
I
-+
4321
+
-
(*)
PLC/control
valve or
positioner
SW 2,
Position A SW 2,
Position B
PLC/control
valve or
positioner
ENTER
Locked Unlocked
SW1
-+
4321
(*) If direct earthing is impossible, connect a 100 nF/50 V-condensator between the negative terminal of the
power supply and the earth.

18 8175
ENGLISH
INSTALLATION
-+
4321
8175 PANEL VERSION, RELAY CONNECTION
The relay version is connected as follows :
Fig. 3.13 Pin assignment for relays
●The device can be easily connected to a PLC independently of the respective
version.
●The ‘Enter‘ key can be locked by placing the SW 1 swich into the left position to
avoid accidental or unauthorized access.
3.4.4 8175 WALL MOUNTED VERSION 18-32VDC
CONNECTION OF THE 8170 SENSOR
●Remove the cover via the screws on the front display and remove the cable gland
as indicated passing the cable through the hole.
●Secure the cable gland supplied on the cable to the box using the plasic nut and
secure the cable.
●Connect the coax and PT1000 cables as shown in the diagram below.
Cable gland to remove
Plastic nuts
Fig. 3.14 Wall cable connections
4-20 mA
18-32 VDC
250 mA
3A
m
24VDC
115/230 VAC
3A
-+
4321
REL1
REL2
+
-
(*)
SW 1
ENTER
Locked Unlocked
OR
(*) If direct earthing is
impossible, connect a
100 nF/50 V-
condensator between
the negative terminal of
the power supply and
the earth.

19
8175
ENGLISH
INSTALLATION
8175 WALL MOUNTED VERSION, 18-32 VDC; WIRING
Remove the cover via the screws on the front display and pull the cable through the
cable gland and wire according to one of the pin assignment diagrams below.
The electronics within the 8175 allows a sourcing or sinking PLC to be connected.
Position A (Fig 3.15) provides a sourcing configuration and Position B (Fig 3.16) a
sinking configuration.
Fig. 3.15 Pin assignment, Position A Fig. 3.16 Pin assignment, Position B
8175 WALL MOUNTED VERSION, RELAY CONNECTION
The electrical wiring of this model is possible via the use of 2 of the cable glands.
Remove the cover via the screws on the front display and pull the cables through the
cable gland and wire according to pin assignment diagram below (Fig. 3.17).
●The device can be easily connected to a PLC independently of the respective
version.
●The ‘Enter‘ key can be locked by placing the SW 1 swich into the left position to
avoid accidental or unauthoridsed access.
Fig. 3.17 Pin assignment for relays
4-20 mA
+
-
18-32 VDC
+
-
250 mA
I
-+
4321
(*)
4-20 mA
+
-
18-32 VDC
250 mA
I
-+
4321
+
-
(*)
4-20 mA
18-32 VDC
250 mA
3A
m
24VDC
115/230 VAC
3A
-+
4321
REL1
REL2
+
-
(*)
PLC/control
valve or
positioner
SW 2,
Position A SW 2,
Position B
PLC/control
valve or
positioner
ENTER
Locked Unlocked
SW1
SW 1
ENTER
Locked Unlocked
OR
(*) If direct earthing is
impossible, connect a
100 nF/50 V-
condensator between
the negative terminal of
the power supply and
the earth.

20 8175
ENGLISH
INSTALLATION
3.4.5 8175 WALL MOUNTED VERSION 115/230 VAC
CONNECTION OF THE 8170 SENSOR
●Remove the cover via the screws on the front display and remove the cable gland
as indicated passing the cable through the hole.
●Secure the cable gland supplied on the cable to the box using the plasic nut and
secure the cable by tightening the cable gland.
●Connect the coax and PT1000 cables as shown in the diagram below.
8175 WALL MOUNTED VERSION 115/230 VAC WITH OR WITHOUT
RELAYS; WIRING
Remove the cover via the screws on the front display and pull the cable through the
cable gland then wire according to the pin assignment diagram below.
To connect the transmitter to a PLC, use terminals 10 and 12 and set SW2 to position
A (see figure above).
Terminals 13 to 16 must only be connected if the transmitter is a version with
relays.
-+
Cable gland to remove
Plastic nuts
SW 2,
Position A
Wires:
Brown
White
Yellow
Green
Wires: Pink - Blue - Red - Black 250-mAT-fuse 115/230VACPower
Supply switch
Cables with diameters between 4 and 8 mm.
123456789101112
13 14 15 16 LN
4-20 mA
+
-
IL+L-
R1 R1 R2 R2 115/230 VAC
Power Supply
Relay 1 Relay 2
For security reasons, secure the
cables onto the board using the
cable clips provided.
PLC, valve or positioner