Thank you very much for buying a transmitter for load cells, strain gauges, and melt pressure sensors UNIFLEX SG 45.
The UNIFLEX SG 45 transmitters are suitable for precise, cost-efficient contol tasks in all industrial applications.
Every SG 45 is equipped with a strain gauge signal input, an universal output and two relays. Optionally the tranmitter
can be fitted with various interfaces.
General
Galvanic isolation is provided between inputs and outputs as well as from the supply voltage and the communica
tion interfaces.
Applications
CI 45 is used for measurement, scaling of electrical signals, e.g. for
Strain gauges
·
Load cells
·
Melt pressure sensors
·
Pressure sensors
·
...
At-a-glance survey of advantages
Compact construction, only 22,5 mm wide
Clips onto top-hat DIN rail
Plug-in screw terminals or spring clamp connectors
Dual-line LC display with additional display elements
Process values always in view
Convenient 3-key operation
Ability for wireless cross-communication with other units mounted on top-hat rail
Strain gauge input with high signal resolution (>15 bits)
Universal output with high resolution (14 bits) as combined current / voltage output
Quick response, only 50 ms cycle time, i.e. also suitable for fast signals
Two relay outputs
Customer-specific linearization
Tare function
Min/max indicator (‘slave pointer’)
Logical linking of digital outputs, e.g. for common alarms
Preset for output value
-
Further documentation for DMS Messumformer SG 45:
–
This operating manual9499 040 82318
–
Data sheet SG 459498 737 57333
–
Operating note SG 459499 040 82441
–
Interface description9499 040 72018
SG 455
General
6SG 45
2Safety hints
.
This unit was built and tested in compliance with VDE 0411-1 / EN 61010-1 and was delivered in safe condition.
The unit complies with European guideline 89/336/EWG (EMC) and is provided with CE marking.
The unit was tested before delivery and has passed the tests required by the test schedule. To maintain this condition
and to ensure safe operation, the user must follow the hints and warnings given in this operating manual and operate
this instrument in compliance with the instructions given in this manual.
Safety hints
a
a
The unit is intended exclusively for use as a measurement and control instrument in technical
installations.
Warning
If the unit is damaged to an extent that safe operation seems impossible, the unit must not be taken into
operation.
ELECTRICAL CONNECTIONS
The electrical wiring must conform to local standards (e.g. VDE 0100). The input measurement and control leads must
be kept separate from signal and power supply leads.
Using screened cables is mandatory! The screening must be connected to ground potential.
In the installation of the controller a switch or a circuit-breaker must be used and signified. The switch or cir
cuit-breaker must be installed near by the controller and the user must have easy access to the controller.
COMMISSIONING
Before instrument switch-on, check that the following information is taken into account:
Ensure that the supply voltage corresponds to the specifications on the type label.
•
All covers required for contact protection must be fitted.
•
If the controller is connected with other units in the same signal loop, check that the equipment in
•
the output circuit is not affected before switch-on. If necessary, suitable protective measures must
be taken.
The unit may be operated only in installed condition.
•
Before and during operation, the temperature restrictions specified for controller operation must
•
be met.
-
a
a
a
a
Warning
During operation, the ventilation slots of the housing must not be covered.
The measurement inputs are designed for measurement of circuits which are not connected directly with
the mains supply (CAT I). The measurement inputs are designed for transient voltage peaks up to 800V
against PE.
Warning
The ventilation slots must not be covered during operation.
The measurement inputs are designed for measurement of circuits which are not connected directly with
the mains supply (CAT I). The measurement inputs are designed for transient voltage peaks up to 800V
against PE.
SHUT-DOWN
For taking the unit out of operation, disconnect it from all voltage sources and protect it against accidental operation.
If the controller is connected with other equipment in the same signal loop, check that other equipment in the output
circuit is not affected before switch-off. If necessary, suitable protective measures must be taken.
SG 457
Safety hints
2.1MAINTENANCE, REPAIR AND MODIFICATION
The units do not need particular maintenance.
There are no operable elements inside the device, so the user must not open the unit
Modification, maintenance and repair work may be done only by trained and authorized personnel. For this purpose,
the PMA service should be contacted.
a
l
g
Warning
When opening the units, or when removing covers or components, live parts and terminals may be
exposed. Connecting points can also carry voltage.
Caution
When opening the units, components which are sensitive to electrostatic discharge (ESD) can be
exposed.
You can contact the PMA-Service under:
PMA Prozeß- und Maschinen-Automation GmbH
Miramstraße 87
D-34123 Kassel
The cleaning of the front of the controller should be done with a dry or a wetted (spirit, water)
handkerchief.
2.3Spare parts
As spare parts für the devices the following accessory parts are allowed:
DescriptionOrder-No.
Connector set with screw terminals9407-998-07101
Connector set with spring-clamp terminals9407-998-07111
Bus connector for fitting in top-hat rail9407-998-07121
Connector for bus connector inverted, left side, horizontal cable outlet *19407-998-07131
Connector for bus connector inverted,
*1 screw connection
right side, vertical cable outlet *119407-998-07141
8MAINTENANCE, REPAIR AND MODIFICATIONSG 45
3Mounting
A
.
Mounting
bmessungen / dimensions
56
22.5
(0,87”)
max.
117.5 (4,63”)
55°C
-10°Cmin.
111 (4, 37 ”)
max.
95% rel.
7
Klemme /
1516
8
terminal
17
12
18
Klemme /
terminal
%
3
11 1 2
Montage / mounting
5.5
(0,20”)
4
2.3
(0,08”)
click
99 (3,90”)
14
13
Demontage / dismantling
1
g
a
a
a
l
a
a
The unit is provided for vertical mounting on 35 mm top-hat rails to EN 50022.
If possible, the place of installation should be exempt of vibration, aggressive media (e.g. acid, lye), liquid, dust or
aerosol.
The instruments of the rail line series can be mounted directly side by side. For mounting and dismounting, min. 8 cm
free space above and below the units should be provided.
For mounting, simply clip the unit onto the top-hat rail from top and click it in position.
To dismount the unit, pull the bottom catch down using a screwdriver and remove the unit upwards.
The transmitter SG 45 does not contain any maintenance parts, i.e. the unit need not be opened by the
customer.
The unit may be operated only in environments for which it is suitable due to its protection type.
The housing ventilation slots must not be covered.
In plants where transient voltage peaks are susceptible to occur, the instruments must be equipped with
additional protective filters or voltage limiters!
Caution! The instrument contains electrostatically sensitive components .
Please, follow the instructions given in the safety hints.
To maintain contamination degree 2 acc. to EN 61010-1, the instrument must not be installed below
contactors or similar units from which conducting dust or particles might trickle down.
SG 459
Mounting
3.1Connectors
g
a
The four instrument connectors are of the plug-in type. They plug into the housing from top or bottom and click in posi
tion (audible latching). Releasing the connectors should be done by means of a screwdriver.
Two connector types are available:
Screw terminals for max. 2,5 mm2conductors
•
Spring-clamp terminals for max. 2,5 mm2conductors
•
Before handling the connectors, the unit must be disconnected from the supply
voltage.
Tighten the screw terminals with a torque of 0,5 - 0,6 Nm.
With spring-clamp terminals, stiff and flexible wires with end crimp can be introduced into
the clamping hole directly. For releasing, actuate the (orange) opening lever.
Contact protection: Terminal blocks which are not connected should remain in the socket.
-
10ConnectorsSG 45
4Electrical connections
.
4.1Connecting diagram
c
a
2
INP1
b
5
EX +
1
INP
+
-
+ Sense -
2
Electrical connections
8
76
EX -
3
3
di1
4
3
1234
1234
4.2
d
e
5
1
OUT3
PWR
~90-260V
Terminal connections
11
15
L
~24V
15
System
12
16
16
top
RGND
R-CAL
V
13
14
18
17
N
18
17
Data A
Data B
RS 485
OUT1
OUT2
6
4
RGND
Data A
Data B
11 12 13 14
11 12 13 14
15 16 17 18
15 16 17 18
a
Faulty connection might cause destruction of the instrument !
1 Connecting the supply voltage
Dependent on order
90 … 260 V ACterminals: 15,16
•
24 V AC / DCterminals: 15,16
•
For further information, see section "Technical data"
g
Instruments with optional system interface:
Energization is via the bus connector of field bus coupler or power supply module. Terminals 15, 16 must
not be used.
2 Connecting input INP1
Input for strain gauge (in 4 and 6-wire connection) or for melt pressure sensors (with/without calibration shunt).
aExcitation voltage for bridge (EXITATION )terminals: 1, 4
bExcitation voltage measuring signal (Sense)terminals: 2, 3
cBridge signal (input)terminals: 5, 6
SG 45Connecting diagram11
Electrical connections
3 Connecting input di1
Digital input
control input (as a potentialfree contact)terminals: 7, 8
4 Connecting outputs OUT1 / OUT2 (optional)
Relay outputs max. 250V/2A NO contacts with a common terminal.
* see interface description MODBUS RTU: (9499-040-72011)
OUT1terminals: 17, 18
OUT2terminals: 17, 14
12Terminal connectionsSG 45
4.3Connecting diagram
The instrument terminals used for the engineering can be displayed and printed out via BlueControlÒ( menu File \ Print
preview - Connection diagram).
Example:
Device1.bct
Connecting plan
Terminal connector 1
NameDescription
Electrical connections
Sensor supply
Probe cable
Process value X1
Terminal connector 2
NameDescription
0...20 mA continuous, signal source: Process value
Alarm Limit 1, Alarm INP1-Error
Terminal connector 3
NameDescription
Alarm INP1-Error
SG 45Connecting diagram13
Electrical connections
4.4Connection examples
Example: Connection load cell with 4 or 6-wire bridge
Sense+
Excitation+
2 SENSE +
1
EX+
+ INP -
Ausgang
Excitation-
Sense-
6INP5INP+
4EX-
3 SENSE -
EX+
+SENSE-
EX-
only with 6-wire bridge
After initialization, a test for connection of the sense signal is made automatically (6-wire connections )
Example: Connection of a (melt) pressure sensor in 4-wire technology with a calibrating resistor
Excitation
1
EX+
Ausgang
Excitation
R-CAL
Example: RS 485 interface with RS 485-RS 232 converter
See documentation 9499-040-72011
RGND
LT
Data A
Data B
6INP-
5INP+
4EX-
3 SENSE -
Data A
Data B
+ INP -
EX+
+SENSE-
EX-
Master z.B. / e.g.
Converter RS 232-RS 485
(ADAM-4520-D)
DATA+ 1
(RS-485)
LT
DATA-
TX+
TXRX+
RX-
(R)+Vs
(B)GND 10
(RS-422)
14Connection examplesSG 45
4.5Hints for installation
Measurement and data lines should be kept separate from control and power supply cables.
w
Sensor measuring cables should be twisted and screened, with the screening connected to
w
earth.
External contactors, relays, motors, etc. must be fitted with RC snubber circuits to manufacturer
w
specifications.
The unit must not be installed near strong electric and magnetic fields.
w
The temperature resistance of connecting cables should be selected in accordance with the
w
local conditions.
Electrical connections
a
a
a
The unit is not suitable for installation in explosion-hazarded areas.
Faulty connection can lead to the destruction of the instrument.
The measurement inputs are designed for measurement of circuits which are not connected directly with
the mains supply (CAT I). The measurement inputs are designed for transient voltage peaks up to 800V
against PE.
Please, follow the instructions given in the safety hints.
4.6UL approval (optional)
For compliance with UL regulations, the following points must be taken into account:
Use only copper (Cu) wires for 60 / 75 °C ambient temperature.
q
q
The connecting terminals are designed for 0,5 – 2,5 mm2Cu (12-30 AWG) conductors.
q
The screw terminals must be tightened using a torque of 0,5 – 0,6 Nm.
q
The instrument must be used exclusively for indoor applications.
q
Max. ambient temperature: 55°C.
q
Maximum operating voltage: see technical data.
q
Max. ratings of relay contacts: 250VAC, 2A (resistive)
SG 45Hints for installation15
Electrical connections
16UL approval (optional)SG 45
Operation
5Operation
.
5.1Front view
1 Line 1: process value display
2 Line 2: display of unit / extended operating level / error list /
Conf and PArA level values
3Tare / sample & hold activated
4 Error list (2 x ô ), e.g.
· Fbf. xsensor fault INP. X
· Pol. xwrong polarity INP. X
· Lim. xlimit value alarm
· ...
5 Increment key / "slave pointer", maximum value
6 Enter key to select extended operating level or error list
Parameter-, Konfigurations-, Installations-Ebene
7 Status indicator LEDs
· green:limit value 1 OK
· green blinking:no data exchange with bus coupler
8 Display elements, active as bars
9 Status of switching output OUT1 active
0 Status of switching output OUT2 active
! Decrement key/ "slave pointer", minimum value
§ PC connection for the BlueControl
Ò
engineering tool
+ INP -
EX+
SG
+SENSE-
2
EX-
kg
g
+
17Front viewSG 45
In the first LCD-display line the measured value is shown. The second LCD-line normally shows the
setpoint. When changing over to the parameter setting, configuration or calibration level and at the
extended operating level, the parameter name and value are displayed alternately.
§ : To facilitate withdrawal of the PC connector from the instrument, please, press the cable left.
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