Renova Sensorex SX-CF Series User manual

Renova S.r.l. –viale Rimembranze 93 –20099 Sesto San Giovanni (Milano) Italy –tel: [phone] –fax: [phone]
www.renova-srl.it –email: [email protected]
SX -CF Series
SX -CH Series
LOAD CELL MANUAL
INSTALLATION AND MAINTENANCE INSTRUCTIONS

2
© Copyright Renova Srl, 2013. All rights reserved.
MANLOADCELLENA4V1117

3
index
introduction ……………………………………………………..……….….…………….…….……
page 4
warning ….……………………………………………….….………..…….…….…….………………
page 4
proper use of the product …………………..……….………..……………………….....……
page 4
assistance …..……………………….…………………..……….…………………………….....……
page 5
general instructions ……………………………………………………….…….………….………
page 5
how it works ..……………………..…………………….…………………………….…
page 5
load cell exploded view…………………………………………………………….……….……..
page 6
unpacking ………………………………………..………………....……………………..…….……..
page 6
flanged cell SX-CF assembling ………..…….……………..……….…………………………..
through-shaft cell SX-CH assembling ..…….………………..………………………………
load cells and roll mounting ………….…..…….………………………………………………
load cells SX-CF models ……………………..…….………………………………………………
load cells SX-CH models and flanges ………….……….……………………………………
electrical connection ……………………………………..…….………………….………………
page 7
page 8
page 9
page 9
page 10
page 11

4
introduction
Dear customer,
Thank you for the preference given to this product we are sure is going to satisfy you thanks to its quality of
construction and design.
The design has been primarily addressed to use in the web-control field of unrolling coils, applications requiring a
precise and stable signal during all the phases of the process, since during the unrolling of the web to the transitory
phases, as cutting and bonding, through the material breakage, emergency stop, etc…
So we have created a family of load cells with flange and another one with through shaft, suitable for the majority of
the applications, with capacity from 50 to 30000 N.
Particular attention was also reserved to the robust construction and to the control and testing of every cell with
their own certification. All electronic components as PCD and strain gauges are protected from dust and dirt.
We recommend the reading of this manual to get familiar with this product as quickly as possible, so to understand
its characteristics and required attentions for its long working life.
For a safe and proper use of this product, please pay particular attention to the security precautions.
RENOVA srl
warning
CAREFULLY READ THE INSTRUCTIONS AND WARNINGS IN THIS MANUAL AND KEEP THEM FOR FURTHER
REFERENCE FOR ENTIRE PRODUCT LIFE. THEY SUPPLY IMPORTANT INSTRUCTIONS REGARDING OPERATIONS AND
SAFETY FOR INSTALLING, USING AND MAINTAINING THE PRODUCT.
PLEASE TAKE THE TIME TO READ AND UNDERSTAND THE INSTRUCTIONS COMPLETELY BEFORE THE
INSTALLATION AND USE OF THIS PRODUCT.
IN THE EVENT OF A POSSIBLE BREAKDOWN OF THE PRODUCT, THE OPERATOR SHOULD UNDERSTAND THE
MANUFACTURER’S INSTRUCTIONS AND BE AWARE OF THE DANGERS, BEFORE ANY CHECK INTERVENTION OR
RECOURSE OF RENOVA’S TECHNICAL ASSISTANCE.
proper use of the product
Our product complies with the following directives:
-2006/42/CE Machine Directive
• Law n° 129 – 2nd August 2008
• Law n° 133 – 6th August 2008
• Law n°14 - 27th February 2009
• Law n° 88 – 7th July 2009
• Law Decree n° 106 – 3rd August 2009
In accordance with the Decree 224/88 CE n. 85/374, Renova defines the limits of use of our product and its correct
use.
The compliance with this Installation and Maintenance Instructions, as well as avoiding costly downtime in
production and replacement of damaged parts, can prevent accidents to things and people.

5
It reminds to respect the rules on the use of equipment suitable of working on the machine, such as helmets,
gloves, goggles, accident prevention shoes, jackets, protective ear plugs or headphones in noisy environments.
Our products are designed to operate according to the characteristics defined by our technical specifications that
must not be overlooked or passed for production needs.
Our technical department is at your disposal for problems when installing or starting the machine and can offer
the right solutions to overcome any problem.
THIS COMPONENT IS EXPRESSLY DESIGNED TO BE MOUNTED IN A MACHINE AND CANNOT WORK
INDEPENDENTLY.
IT IS ABSOLUTELY FORBIDDEN THE USE IF THE MACHINE IS NOT IN COMPLIANCE WITH THE LAW.
Particular attention to be given to operations of assembly and maintenance:
Securely block the mounting screws of the flange with a tightening torque recommended by the screw producers.
Screw
M6
M8
M10
M12
M14
Torque [Nm]
10,4
24,6
50,1
84,8
135
assistance
Renova is worldwide present with Agents and Distributors.
Contact Renova support
[e-mail]
general instructions
HOW IT WORKS
The load cell is a transducer that converts the force applied by the roller on the bearing, in a proportional electric signal
that will be processed by the control system, generally composed by a PLC or a dedicated panel and which adjust the
controlled parameters of the unit (brake, clutch, engine, …).
The cell body is an elastic system which bends under load. The elastic part of the cell has the shape of a lamella properly
dimensioned in function of the load, to which the strain gauges are glued, made up of small grids of constantan
filaments, Wheatstone-bridge connected for a precise calibration.
When, under load, the lamella flexes and stretches, the extensometers accordingly
vary their electrical resistance.
When feeding the load cell, the change in the electrical output signal will be
proportional to the deformation of the strain gauges, so to the load applied to the cell
itself.
The output signal is normally of a few mV: hence, if the load cell is farther than 5 m
from the control unit, it may be necessary to amplify the signal through an external
amplifier or an ampli-PCD housed in the cell.

6
LOAD CELL EXPLODED VIEW
Figure 1
UNPACKING
Check that the package has not been damaged during transport. Verify that the paper box contains the parts listed
below and they correspond to the ordered cell, whose code is silk-screened onto the load cell body.
Load Cell
1
SX-CF
SX-CH
Self-aligning bearing
1

7
Multi-pin cable
1
Seeger
1
Block screw
4
* The mounting screws are not included
FLANGED CELL SX-CF ASSEMBLING
Please, carefully follow these assembling steps:
Mount the cell with the arrow, printed on the body of the cell itself, oriented in the same direction of the resultant
of the forces acting on the load cell. A red dot is printed onto the load cell body and has the same role of the arrow,
hence helping the correct orientation of the sensor. Figure 2
Fix the flange of the cell onto the machine frame after checking the dimension of the centering and positions of the
screws. In case the project foresees the presence of two opposing load cells, check their co-axiality. Lock firmly the
mounting screws, following the specified tightening torque for the required type of screw.
Pay attention in this operation because a mistake in the correct mounting may lead, in case of detachment of the
cells, to the break of the machine.
Figure 2

8
Make sure the following requirements are fulfilled:
The rolls, where the cells are placed, have to be made by a unique structure with fixed pins, where the self-aligning
bearings are set.
The rolls have to be dynamically balanced not to generate vibrations, which can affect the load cell signal.
The rolls have to be axially locked only at one end, while at the other end they have to be free to slide. Figure 3
The length of the roll has to be design according to the selected load cell.
THROUGH SHAFT CELL SX-CH ASSEMBLING
Please, carefully follow these assembling steps:
Mount the cell with the arrow, printed on the body of the cell itself, oriented in the same direction of the resultant
of the forces acting on the load cell. Figure 2
Fix the flange of the cell onto the machine frame after checking the dimension of the centering and positions of the
screws. In case the project foresees the presence of two opposing load cells check their co-axiality. Lock firmly the
mounting screws, following the specified tightening torque for the required type of screw.
Pay attention in this operation because a mistake in the correct mounting may lead, in case of detachment of the
cells, to the break of the machine.
Make sure the following requirements are fulfilled:
The rolls, where the cells are placed, have to be made by a unique structure with fixed pins where the self-aligning
bearings are set.
The rolls have to be dynamically balanced not to generate vibrations which can affect the load cell signal.
The rolls have to be axially locked only at one end, while at the other end they has to be free to slide. Figure 3
The length of the roller has to be design according to the selected load cell.
Into the load cell body, two set screws are placed in order to regulate the maximum displacement of the sensor. The
position of these screws is calibrated and has not to be modified. If they are excessively screwed down, they limit
the deformation of the lamella, hence the strain gauges; on the other side, if they are too untighten, the
displacement of the lamella increases, so the risk of going above the yield strength of the material could overcome.
Figure 3

9
LOAD CELLS AND ROLL MOUNTING
For the correct mounting of roll and load cells, check these points:
Use roll with fixed end support (without central bar and without bearings)
A dynamic and static balancing of the roll is required
Use only self-aligning ball or roller bearings
Use the seeger only at one end-side; the other end has to let the roller free to axially move.
There are two possible mounting solution, referring both for the SX-CF load cell than for the SX-CH one.
In Figure 4 the external mounting, in Figure 5 the internal mounting solution.
LOAD CELL SX-CF MODELS
Cell
Bearing
Bearing code
Seeger
Seeger code
Spacer
Spacer code
Weight
SXCF085.xxx.15
15x35x14 2202-2RS
C30.0015
J35 DIN472
A70.0004
RAM 35
A65.0001
1,2 Kg
SXCF085.xxx.17
17x40x16 2203-2RS
C30.0014
J40 DIN472
A70.0005
RAM 40
A65.0002
1,2 Kg
SXCF085.xxx.20
20x47x18 2204-2RS
C30.0016
J47 DIN472
A70.0003
RAM 47
A65.0003
1,1 Kg
SXCF085.xxx.25
25x52x18 2205-2RS
C30.0023
J52 DIN472
A70.0001
RAM 52
A65.0004
1,0 Kg
SXCF120.xxx.25
25x52x18 2205-2RS
C30.0023
J52 DIN472
A70.0001
RAM 52
A65.0004
2,8 Kg
SXCF120.xxx.30
30x62x20 2206-2RS
C30.0017
J62 DIN472
A70.0007
RAM 62
A65.0005
2,6 Kg
SXCF120.xxx.35
35x72x23 2207-2RS
C30.0018
J72 DIN472
A70.0008
RAM 72
A65.0006
2,4 Kg
SXCF130.xxx.25
25x52x18 2205-2RS
C30.0023
J52 DIN472
A70.0001
RAM 52
A65.00014
3,3 Kg
SXCF130.xxx.30
30x62x20 2206-2RS
C30.0017
J62 DIN472
A70.0007
RAM 62
A65.0005
3,1 Kg
SXCF130.xxx.35
35x72x23 2207-2RS
C30.0018
J72 DIN472
A70.0008
RAM 72
A65.0006
2,9 Kg
Figure 5 –External mounting
Figure 4 –Internal mounting

10
LOAD CELL SX-CH MODELS AND FLANGES
Cell
Bearing
Bearing code
Seeger
Seeger code
V-Ring
V-Ring code
Weight
SXCH100xxx.12
12x32x14 2201-2RS
C30.0019
J32 DIN472
A70.0009
VA 12
G90.0001
1,1 Kg
SXCH100xxx.20
20x47x18 2204-2RS
C30.0016
J47 DIN472
A70.0003
VA 20
G90.0003
1,0 Kg
SXCH105xxx.17
17x40x16 2203-2RS
C30.0014
J40 DIN472
A70.0005
VA 17
G90.0002
1,4 Kg
SXCH105xxx.20
20x47x18 2204-2RS
C30.0016
J47 DIN472
A70.0003
VA 20
G90.0003
1,2 Kg
SXCH125xxx.25
25x52x18 2205-2RS
C30.0023
J52 DIN472
A70.0001
VA 25
G90.0004
3,0 Kg
SXCH125xxx.30
30x62x20 2206-2RS
C30.0017
J62 DIN472
A70.0007
VA 30
G90.0005
2,7 Kg
SXCH125xxx.35
35x80x31 6207-2RS
C30.0024
J72 DIN472
A70.0008
VA 35
G90.0006
2,4 Kg
SXCH175xxx.30
30x62x20 2206-2RS
C30.0017
J62 DIN472
A70.0007
VA 30
G90.0005
8,9 Kg
SXCH175xxx.35
35x80x31 6207-2RS
C30.0024
J72 DIN472
A70.0008
VA 35
G90.0006
8,6 Kg
SXCH175xxx.40
40x80x23 2208-2RS
C30.0022
J80 DIN472
A70.0012
VA 40
G90.0009
8,2 Kg
SXCH265xxx.65
65x120x31 2213-2RS
C30.0020
J120 DIN472
A70.0010
VA 65
G90.0007
15 Kg
SXCH265xxx.80
80x140x33 2216-2RS
C30.0021
J140 DIN472
A70.0101
VA 80
G90.0008
14 Kg
Flange
Cell size
φ Shaft
Code example
FA
SXCHxxx
yy
FACHxxxyy
FC
SXCHxxx
yy
FCCHxxxyy

11
ELECTRICAL CONNECTION
The Sensorex Load Cells are of two types: standard or amplified. The difference consists in the power supply and the
output signal. In the following table you can find the characteristics of the two load cell types.
Standard cell
Amplified cell
Power supply
2÷10 VDC
Power supply
12 VDC
Output signal
1,6 mV/V
Output signal
4÷20 mA
Standard cell connection
Amplified cell connection
wire
color
wire
color
Supply (+)
RED
Supply (+)
RED
Supply (-)
BLACK
Supply (-)
BLACK
Signal (+)
WHITE
Signal (+)
GREEN
Signal (-)
GREEN
Technical data
Precision class
0,5%
Repeatability
<±0,03
Max load
3000 Kg
Temperature
-10°C ÷50°C
Input resistance
350 ±3 Ω
Protection rating
IP 60
Output resistance
350 ±3 Ω
Material
Aluminum / Steel
Insulation resistance
>5 GΩ
Overload
150%
Non-linearity
< 0,05%
Max overload
200%
Code
Description
CNTH100P6
Flanged hexa-polar male connector
CAVOSS5M
Multipolar 5m-long cable with female elbow connector

Renova S.r.l. –viale Rimembranze 93 –20099 Sesto San Giovanni (Milano) Italy –tel: [phone] –fax: [phone]
www.renova-srl.it –email: [email protected]