Synectic Electronics SY038 User manual

SY038
Universal Load Cell Amplifier
User manual
Rev. 17-10-2017

Description
The SY038 is a versatile amplifier accepting signals from a range of wheatstone bri ge
type sensors.eg; loa cells, pressure sensors, torque trans ucers an some
accelerometers. It is enclose in a compact DIN rail mounting case.
The amplifier has switch selectable full scale input sensitivities, from 0.25 to 4.4mV/V. This
covers the vast majority of available loa cells. It has the ability to rive up to 4 x 350 ohm
loa cells, or 2 x 120 ohm loa cells.
The SY038 can be or ere to run off a range of power supplies. Options are 17 – 30VDC,
110 – 240VAC or an automotive option of 10-16VDC
Load cell amplifier as shipped
standard DC powered Unit AC Powered version (only available in IP65 wall mount case)
SY038 is supplied in different out put versions
•Voltage version +/- 10V
•Voltage version +/- 5V
•Current version 4-20mA
Features
i. The loa cell amplifier has switches use to select mV/V from 0.25 to 4.4mV/V in 16
steps (Double sensitivity HS version also available ,see figure 2)
ii. Amplifier has very high stability an accuracy on voltage an current out
iii. Unit is protecte against reverse polarity connection as well as having a very high
immunity to interference
iv. Unit is supplie as stan ar in a compact DIN rail mount case
Typical applications
The SY038 can be use with a maximum of 4 x 350Ω loa cells, an epen ing on the
application a 4-20mA output or +/-10V output signal will be obtaine . In or er to suit user
requirements the unit can be set up for any input as illustrate in fig. 2 using switches on
the reverse of the unit.
To get a bipolar output from a current version you can set the zero as 12mA so the max
negative value from the loa cell will be 4mA an the max positive value will be 20mA. To
achieve this the scaling switches will nee to be change as the full scale range will be
ouble that of the unipolar setup. For example, if you ha it set for 0 – 2mV/V, the bipolar
version woul be +/- 2mV/V, ie 4mV/V.

Fig 1: Switch settings for SY038 (HS version in lilac)
** To access the switches, lever off the cover of the amplifier (with the CE marking) from
the bottom right corner using a flat hea screw river.
nstallation
Before installation check that the unit is secure an not amage an that the
environment specifications for the pro uct are as in icate in the manual.
For the installation take into consideration the following:
I. Ensure the component is stable on installation an easy access to the component
II. Avoi contact with water or flui s for the safety of the unit. SY038 can be operate
in any in ustrial environment provi e the following limits are not excee e .
Operating Temperature: -20 to 100 (°C)
Storage temperature: -65 to 150 (°C
3.0 – 4.4mV/V(St )
1.5 - 2.2mV/V (HS)
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
1 2 3 4
ON
2.9 - 4.2mV/V
1.45 - 2.1mV/V
2.8 - 4.0mV/V
1.4 - 2.0mV/V
2.7 – 3.8mV/V
1.35 - 1.9mV/V
2.4 - 3.4mV/V
1.2 - 1.7mV/V
2.3 - 3.3mV/V
1.15 - 3.15mV/V
2.1 - 3.0mV/V
1.05 -1.5mV/V
2.0 - 2.9mV/V
1.0 - 1.45mV/V
1.3 - 2.0mV/V
0.65 - 1.0mV/V
1.2 - 1.8mV/V
0.6 - 0.9mV/V
1.1 - 1.5mV/V
0.55 - 0.75mV/V
1.0 - 1.4mV/V
0.5 - 0.7mV/V
0.7 - 1.0mV/V
0.35 - 0.5mV/V
0.55 - 0.8mV/V
0.28 - 0.4mV/V
0.37 - 0.55mV/V
0.19 - 0.28mV/V
0.25 - 0.37mV/V
0.13 - 0.19mV/V

Specifications
Parameter Min Typ Max
Supply voltage (DC)
LV-DC
(AC)
17
10
110
24 30
16
240
Input sensitivity (mV/V)
High sensitivity (HS) version
0.25
0.125
4.4
2.2
Excitation voltage (V)
LV-DC
9.95 10
6
10.05
Ban wi th (-3 B)
2 pole low pass filters
Filtere Versions
5, 25, 50 or
100Hz
1.5kHz
unfiltere version
Current consumption (mA)
(Voltage version) inc. 350 Ω
inc. 350Ω Bri ge 50mA (1.17W)
Current consumption (mA)
(Current version)
“ 68 mA (1.6W)
Current Consumption (mA)
(Low voltage -DC version)
“ 31mA (1.2W)
Full scale step response (msec) 0.41
Zero temperature rift at output
(ppm/C)
20
Span temperature rift (ppm/C) 15
Non Linearity 0.002%
Zero a justment (V)
(Voltage version)
-4 4
Zero a justment (mA)
(Current version)
1 14
Span fine a justment -20% 20%
Output loa Voltage version (mA) -8 8
Output loa Current version (Ω) 0 650
Operating temp. 1x350Ω cell 24V
(°C)
-20 100
Operating temp. 4x350Ω cell 24V
(°C)
-20 65
Storage temperature (°C) -65 125
EMC Teste to BS EN 61000-4-21:2011
Case H (on rail) = 72.5mm, W = 18mm, D = 62mm.
Moul e in grey flame resistant polyami e.
For use with rails to EN50035 (DIN46277-1)
asymmetric or
EN50022 (DIN46277-3) symmetric.
Connections Rising Clamp terminals with 3.5 x 2.5mm apertures

Connections
Physical connections and dimensions
Fig 2: SY 38 input/output connections
Physical dimensions: 72.5mm x 18mm x 62mm
At the maximum operating temperature 1 350Ω loa cell can be use .
Graphs illustrating ban wi th, typical operating temperature of voltage out an current out
versions
SY038 BANDW DTH
Graph 1: SY 38 frequency response

Thermal stability of SY038
SY038V
Graph 2: SY038V span rift with temperature
Graph 3: SY038V zero offset
-40 -20 0 20 40 60 80 100 120
-0.70
-0.60
-0.50
-0.40
-0.30
-0.20
-0.10
0.00
0.10
0.20
Span
Temp
%Shift
-40 -20 0 20 40 60 80 100 120
-0.05
0.00
0.05
0.10
0.15
0.20
0.25
Zero offset
Temp
%Shift

Thermal Stability
SY038
Graph 4: Zero offset
Graph 5: Drift with temperature
Troubleshooting
Unit connecte to the loa cell but the output is going in the wrong irection.
Solution: Switch the connection of the signal wires.
Can't quite achieve require output.
Solution: Try the range on either si e by changing the switch settings. Alternatively
remove cover with connection etails & trim excitation voltage up or own to a just
max or min output using the trim pot in the bottom right corner.
Enquiries and trouble shooting
For any enquiries an problems with SY038 or other available pro ucts checkout our
website or sen email using the appropriate link below.
Website: www.synectic.co.uk
Email: [email protected]
-40 -20 0 20 40 60 80 100 120
-0.20
-0.15
-0.10
-0.05
0.00
0.05
0.10
0.15
0.20
Zero offset
Temp
%Shift
-40 -20 0 20 40 60 80 100 120
-0.30
-0.20
-0.10
0.00
0.10
0.20
0.30
0.40
0.50
0.60
Span
Temp
% Shift

DECLARATION OF CONFORMITY FOR
LOAD CELL AMPLIFIERS
Name of manufacturer or supplier: Synectic Design Lt
Registere office: 48 Brin ley Close
(inclu ing country of origin) Farnworth
Bolton
Lancashire
Englan
Postco e: BL4 0AG
Description of pro uct: SY038 Analogue Loa Cell Amplifiers
inclu ing all variants
Stan ar s un er which conformity is eclare :
BS EN 61326-1: 2006 Electrical equipment for measurement, control an
laboratory use-EMC requirements. Part1-2-3
BS EN 61000-4-2:1995, Immunity to electrostatic ischarge
1ec 61000-4-2:1995 Teste up an inclu ing level 8KV Air ischarge
BS EN 61000-4-3:2006 +A1:2008 Immunity to ra iate frequency electromagnetic fiel s
at 10V/M
BS EN 61000-4-4:2004 Immunity to electrical fast transient/burst. Test levels
Up to an inclu ing +/-4KV on supply ports an +/-2KV on
input/output signal an ata ports. (test Level 4)
Directive 2011/65/EU In relation to restriction of use of certain hazar ous
(RoHS2) substances in electrical an electronic equipment.
REACH (article 3) Synectic Electronics Lt are manufacturers of electronic
har ware. We are seen as a ‘ own stream user’ accor ing to REACH regulations. We are
therefore are not require to register with the European Agency for chemicals ‘ECHA’.
Name of authorise representative: Brian Peter Tonge
Position of authorise representative: Technical Director
Declaration
I eclare that, as the authorise representative, the above information in relation to the
supply/manufacture of these pro ucts, when use as recommen e , are in conformity with the
state stan ar s an other relate ocuments following the provision of EEC Directives.
Signature of authorise representative:
Date: 15/09/2015
Revision 17-1 -2 17