Seneca K121 User manual

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Cold junction compensation: YES.
Input filter: DISABLE.
Reversed output: NO.
TC Type: K.
Measurement range start: 0°C.
Measurement full-scale: 1000 °C.
Output signal in case of fault: Towards the top of the output range.
Over-range: YES, at 2,5% over-range values is accepted, at 5% over-range value is
considered a fault.
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ENGLISH 6/8
ENGLISH 1/8 ENGLISH 3/8 ENGLISH 5/8 ENGLISH 7/8
MI002152-I-E MI002152-I-EMI002152-I-E
MI002152-I-E MI002152-I-E MI002152-I-E MI002152-I-E
MI002152-I-E
ENGLISH 2/8 ENGLISH 4/8 ENGLISH 8/8
SENECA s.r.l.
Via Germania, 34 - 35127 - Z.I. CAMIN - PADOVA - ITALY
Tel. [phone] - Fax [phone]
For manuals and configuration software, see www.seneca.it
This document is property of SENECA srl. Duplication and reprodution are forbidden, if not authorized.
Contents of the present documentation refers to products and technologies described in it. All technical data
contained in the document may be modified without prior notice Content of this documentation is subject to
periodical revision.
Connections
Dimensions / Box
Storage temperature
degree protection
-20 ..+85°C
IP20
Connections 8 Spring terminals
Dimensions L: 93 mm; H: mm; W: 6,2 mm102,5
PBT, Black
Standards
The module is conforming to the following regulations:
EN61000-6-4/2002 (Electromag n e t i c
e m i s s i o n , i n d u s t r i a l e n v i r o n m e n t ) .
EN61000-6-2/2006 (Electromagnetic
i m m u n i t y, i n d u s t r i a l e n v i r o n m e n t ) .
EN61010-1/2001 (safety). All circuits must be
isolated from the other circuits under
dangerous voltage with double isolation. The
power supply transformer must comply with
EN60742 “Isolated transformers and safety
transformers”.
Table of accuracy measure: The greater of
the sum of (A+B) and C
Box
Contents:
Ø
Ø
Ø
Ø
General specifications
Technical features
Installation / Connections rules
Electrical connections
Ø
Ø
Ø
Table: Input range and accuracy of
measure
Diagram: Load resistance vs minimum
functioning voltage.
Factory settings and advanced
settings.
Environmental condition
Operating temperature
Humidity
-20 ..+65°C
30 ..90% a 40°C non condensing
Installation
Manual
Installation
Manual
Isolation
1500 V
ANALOG
OUTPUT
ANALOG
INPUTS
1
2
7
3
4
8
SUPPLEMENTARY NOTE FOR USE:
Use in environment with 2 or less pollution degree.
Voltage (mV) input
The signal input may come from thermocouple J, K, R, S, T, B, E, N (EN 60584) sensors or
(thermoresistance) like t , i , t , t and Ni100
K121 besides can read voltages in V and mV, current in mA , and resistances.
RTD P 100 N 100 P 500 P 1000 .
For the maximum performance it’s recommended to use a shielded cable.
See Fig. 4 below for input connections.
Description
Connections with spring terminals
The module has been designed for spring-type terminal electrical connections:
Proceed as follows to make the connections:
1) Strip the cables by 0.8 mm.
2) Insert a screwdriver in the square hole and press it until the cable lock spring opens..
3) Insert the cable in the round hole.
4) Remove the screwdriver and make sure that the cable is tightly fastened in the terminal.
Fig. 3
ELECTRICAL CONNECTIONS
Input
TABLE: RANGE AND ACCURACY
OF MEASURE
INPUT
Thermocouple
RTD
Input Range Calibration
error EMI
K
J
R
S
T
B
E
N
0,1 %
-200..1372 °C
-210..1200 °C
-50..1768 °C
-50..1768 °C
-200..400 °C
0..1820 °C
-200..1000 °C
-200..1300 °C
< 0,5 %
0,1 %
0,1 %
0,1 %
0,1 %
0,1 %
0,1 %
0,1 %
0,1 %
Voltage
Potent.
Resist.
Ni100
Pt100
Pt500
Pt1000
-60..250 °C
-200..650 °C
-200..200 °C
-200..650 °C
0,1 %
0,1 %
0,1 %
0,1 %
0,1 %
0,1 %
Minimum
Span Resolution
mV
Ω
Ω
Resist. Ω
-150..150 mV
0..1760 Ω
0..400 Ω
50 °C
50 °C
100 °C
100 °C
50 °C
100 °C
50 °C
50 °C
20 °C
20 °C
20 °C
20 °C
2,5 mV
10 %
10 Ω
5 µV
5 µV
5 µV
5 µV
5 µV
5 µV
5 µV
5 µV
6 mΩ
28 mΩ
28 mΩ
5 µV
0.0015 %
6 mΩ
28 mΩ
Standard
EN 60584
EN 60584
EN 60584
EN 60584
EN 60584
EN 60584
EN 60584
EN 60584
DIN 43760
EN 60751
6 mΩ
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
< 0,5 %
Input type
Thermocouple J,K,T,N,E
Thermocouple B, R, S
RTD
Resistance F.S. = 400 Ω
Voltage mV
Potentiometer
Resistance F.S. = 1760 Ω
0.05 %
0.05 %
0.05 %
0.05 %
0.05 %
0.05 %
0.05 %
0.05 %
0.05 %
0.05 %
0.05 %
0.05 %
0.05 %
0.05 %
0.5 °C
1 °C
0.1 °C
40 mΩ
200 mΩ
15 µV
3 mV
A : % of measure B : % of span C : Minimum
5 6
Current input
40 Ω
Input impedance
Voltage (V) input
200 kΩ
Input impedance
10 MΩ
Input impedance
-150 ..150 mV
Input range
-30 ..30 Vdc
Input range
-24 ..24 mA
Input range
Voltage
0,1 %
0,1 %
V
0,1 %
Current mA -24 ..24 mA
-30 ..30 Vdc
10 %
0,5 V
0,5 mA
~ 1 mV
~ 1 µA
< 0,5 %
< 0,5 %
< 0,5 %
Voltage V
Current
0.05 %
0.05 %
0.05 %
0.05 %
3 mV
2 µA
GENERAL SPECIFICATIONS
TECHNICAL FEATURES
Output / Power supply
INSTALLATION / CONNECTIONS RULES
The module is designed to be installed, in vertical position, on DIN 46277 rail. For the best
module performance and duration, avoid to place cables raceways and other objects that
could obstruct the ventilation.
Never install the modules near heat sources. The module installation is advised in the bottom
of the control panel.
Load resistance 1 kΩ @ 28 Vdc, 21 mA (see the diagram
Load resistance vs minimum functioning
voltage).
Output in case of over-range + 2,5% of end scale, - 2,5% of start scale
Current output
Disposal of Electrical & Electronic Equipment (Applicable throughout the European Union and other European
countries with separate collections programs). This symbol, found on your producr or on its packaging, indicates
that this product should not be treated as household waste when you wish to dispose of it. Instead, it should be
handed over to an applicable collection point for the recycling of electrical & electronic equipment. By ensuring this
product is didposed of correctly, you will help 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 conserve natural resources. For more detailed information about the recycling of the product, please
contact your local city office, waste disposal service of the retail store where you purchased this product.
4 ..20 mA
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Conversion and transmission of the input read into a normalized signal current in the
output for the loop 4 ..20 mA that is connected with 2 wire connection.
Thermocouple input J, K, R, S, T, B, E, N ( EN 60584 ).
RTD input (PT100 - 500 - 1000, Ni100) with 2, 3 o 4 wire connections.
Voltage input ± 30 V.
Voltage input ± 150 mV
Current input ± 24 mA.
Potentiometer input with resistance between 500 Ω and 10 KΩ.
Resistance input up to 1760 Ω.
Reduced response time (Voltage and Current input): 140 ms
Reduced response time (Other inputs): < 620 ms
High precision.
16-bit measurement conversion.
1500 Vac output isolation.
Compact size 93 x 102,5 x 6,2 mm.
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Resolution 2 µA (> 13 bit)
Output and power supply from loop 4 ..20 mA
Current output protection ~ 30 mA
Output in case of fault + 5% of end scale, - 5% of start scale
Potentiometer input
Value of potentiometer From 500 Ω to 10 kΩ
Input impedance 10 MΩ
Thermocouple input
Cold junction compensation -40 ..65 ± 1,5°C; Settable
Input impedance 10 MΩ
Sensor fault detection Yes; Settable
RTD input / Resistance
Maximum cable resistance 25 Ω
Exitation current 375 µA
Influence cable resistancei 0,003 Ω/Ω
DIAGRAM: LOAD RESISTANCE VS MINIMUM
FUNCTIONING VOLTAGE
1200
800
400
0
R =((U-7)/0.021)Load
5 10 15 20 25 30
Minimum functioning voltage U (V )DC
RLoad ( )W
Inserting the module in the rail
5
4
K121
2 wire - Loop powered
TC/RTD/I & V trasmitter.
1
2
3
6
7
8
1
2
3
4
5
6
7
8
ET003320B
µP
mA
LoopSupply
7..30 Vdc
+
OUTPUT
CurrentInput
VoltageInput
+
I
I
4W 3W 2W
RTDINPUT TC
INPUT
ORmV
+
INPUTS
5
4
K121
2 wire - Loop powered
TC/RTD/I & V trasmitter.
1
2
3
6
7
8
1
2
3
4
5
6
7
8
ET003320B
µP
mA
LoopSupply
7..30 Vdc
+
OUTPUT
CurrentInput
VoltageInput
+
I
I
4W 3W 2W
RTDINPUT TC
INPUT
ORmV
+
INPUTS
Fig. 1
Removing the module from the rail
Fig.2a
1) Attach the module in the upper part of
the rail (as shown in the picture 2a).
2) Press the module downwards.
1) Apply leverage using a screwdriver ( as
shown in the picture 2b)
2) Rotate the module upwards.
Fig. 2b
5
6
mA
I
+
This connection can be used for short distances ( < 10 m) between module and probe, you
should note that it adds an error (which may be removed by sofware programming) equivalent
to the resistance contributed by the connection cables to the measurement.
The module must be programmed by PC for 2 wire connection
RTD 2 wire connection
This connection can be used for medium-long distances ( > 10 m ) between module and
probe. The instrument performs a compensation for the resistance of the connection cables.
For a correct compensation the resistance value of each conductor must be the same.
The module must be programmed by PC for 3 wire connection.
RTD 4 wire connection
Current Loop connection (regulated current).
The use of shielded cables is recommended for the
electric connections.
Note: in order to reduce the instrument's
dissipation, we recommend guaranteeing a load of
> 250 to the current output.Ω
RTD 3 wire connection
This connection can be used for medium-long distances ( > 10 m ) between module and
probe. Provides the maximum precision because the instrument measures the resistance of
the sensor independently of the resistance of the connection cables
The module must be programmed by PC for 4 wire connection.
.
Installation on DIN46277 rail
1
2
3
4
7
8
I
Potentiometer Volt. (V) Current TC RTD
Fig. 4
Table: Output signal limit / fault or over-range
Output signal limit Over-range / ±2,5 % Fault ±5 %
20 mA 20,4 mA 21 mA
4 mA 3,6 mA < 3,4 mA
FACTORY SETTINGS AND ADVANCED SETTINGS
Factory settings
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Setting of the start scale and full scale value.
RTD: 2 wire, 3 wire, 4 wire connections.
Output: Normal (4 ..20 mA) or reversed (20 ..4 mA).
Selection of input type.
Cable resistance compensation for 2 wires measurement.
Output signal in case of fault: towards the bottom or towards the top of the output range
Over-range: NO (the fault alone causes at 2,5% over range value) or YES (at 2,5 over-range
value is accepted, at 5 % over range value is considered a fault).
Cold junction compensation:YES / NO.
Measure filter: Enable / Disable
Advanced setting
Fig. 5
Variations of standard parameters are possible by using configuration softwares. See
to consult the download section.
www.seneca.it
2 Wire 3 Wire 4 Wire
R = 500 R = 10 k
min max
Ω
Ω
V = ± 30 Vdc
in
I = ± 24 mA
in
+
Thermocouple = J, K, R, S, T, B, E, N
(EN 60584)
V = 7 ..30 Vdc
in
Software configuration
S117P (USB/RS232
/TTL) converter
The configuration by PC use (see the drawing below) is possible with the following
accessories
Volt. (mV)
V = ± 150 mV
in
+
Z-PC Line
Z-PC Line
EN
EN
K Line
K Line
EN
EN
SENECA
S
K121
K121
Universal isolated transmitter
with 2 wire - loop powered
Universal isolated transmitter
with 2 wire - loop powered
Power supply
Power consumption
7 ..30 VDC
< 660 mW
+
500.. 10000Ω