SENECA K109TC Temperature Insulated Converter Instruction Manual

SENECA K109TC Temperature Insulated Converter Instruction Manual

General Description

The K109TC instrument is a 4-point galvanic insulator. It converts a temperature signal read by a thermocouple into a signal normalized in voltage or current; besides it has a passive output which commutates at the overcoming of a threshold set through a button on the front.
The module’s main features are its compact size (6.2 mm), attachment to a 35 mm DIN rail, bus-connector power supply option, quick connection by spring terminals, and easy configuration in the field by DIP-switch.

Technical Features

Power supply :
Consumption :| 19,2..30 Vdc
max 24 mA at 24 Vdc
---|---
Input :| Thermocouples types: J, K, E, N, S, R, B, T
Tables :| EN60584-1 (ITS-90)
Measurement Range :| Depending on the thermocouple type (see Range and
| Precision of the Input Table), on the dip-switches
| selection (see Setting of the Dip-Switches section)
Minimum span :| 100 °C
Impedance :| 10 MW
Test Current :| <50 nA
CMRR (1) :| >135 dB, refered to power-supply side
DMRR (1) (2):| >40 dB

1. The values are valid at the set rejection frequency, with filter ON.
2. For disturbance values such as the input signal peak does not exceed the limit of acceptability.

Range and Precision of the Input

Thermocouple| Admitted Range| Mean Error| Resolution
J| -210..1200 °C| 0,025 % + 0,29 °C| 0,12 °C
K| -200..1372 °C| 0,025 % + 0,4 °C| 0,17 °C
E| -200..1000 °C| 0,025 % + 0,2 °C| 0,92 °C
N| -200..1300 °C| 0,025 % + 0,42 °C| 0,19 °C
S| -50..1768 °C| 0,025 % + 1,34 °C| 0,66 °C
R| -50..1768 °C| 0,025 % + 1,19 °C| 0,59 °C
B| 250..1820 (*)°C| 0,025 % + 1,87 °C| 0,9 °C
T| -200..400 °C| 0,025 % + 0,31 °C| 0,13 °C

*():** Up to 250 °C, the output is considered equivalent to a null temperature.

Static Aux Output :

|

Applicable Voltage : 24 Vac Nominal Current: 60 mA Max

ADC :| 14 bits
Class/Base Prec. :| 0,1 %
Thermal Drift :| 120 ppm/K
Response Time : (10..90 %):| < 25 ms (without filter)
| < 55 ms  (with repeat filter 50 Hz)
Cold junction error :| 1,5 °C Max
Insulation Voltage :| 1,5 kV (50 Hz for 1 min)
Protection Index :| IP20
Operating Conditions :| Temperature -20..+65 °C
| Humidity 10..90 %  at  40 °C  non-condensing.
Storage Temperature :| -40..+85 °C
Altitude :| Up to 2000 slm
LED Signalling :| Fault/Anomaly, state of the auxiliary output
Connections :| Spring terminals
Conductor Section :| 0,2..2,5 mm2
Wire stripping :| 8 mm
Box :

Dimensions, Weight :

| PBT (black colour)

6,2 x 93,1 x 102,5 mm, 46 g.

Standards : EN61000-6-4/2002 (electromagnetic emission, industrial surroundings) EN61000-6-2/2005 (electromagnetic immunity, industrial surroundings) EN61010-1/2001 (safety)
All the circuits must be provided with double insulation from the circuits under dangerous voltage. The power supply transformer must be built to compliance with EN60742: “Insulation transformers and Safety transformers”. Notes:

• Use with copper conductor.
• Use in Pollution Degree 2 Environment.
• Power Supply must be Class 2.
• When supplied by an Isolated Limited Voltage/Limited Current power supply a fuse rated max 2.5 Ashall be installed in the field.

AUXILIARY OUTPUT

Description

The auxiliary output has been designed in order to pilot an indicator, a relay of greater power or the input of a supervisor control system. Through this output the K109 TC instrument may generate an alarm or may be utilized like a thermostat. The state Normal of the output depends on the configuration for the fault of the primary output, so on the setting of the correspondent dip- switch SW2.7 (see table). Details of Dip-Switch SW2.7
Since during the regulation of the threshold the primary output assumes the value of the threshold, it is advisable to connect an instrument of measure (a multimeter for example) to the primary output. Therefore the value in V or mA of the threshold depends on the scale of the chosen output. The switching is instantaneous to the overcoming of the set up value.

Setting of the threshold

The regulation of the threshold is performed through a button present under the frontal cover and accessible through the hole by using a little screwdriver. The operation has to be performed when the module is correctly supplied. It will be necessary to follow the next procedure:

• Pressed and released the button, the primary output starts to represent the value of threshold. At this point the red led flashes slowly.
• If within 5 seconds there is no pression, the system returns to the normal functioning.
• On the contrary at every further pressure, there is an increment or decrement of approximately 0,2 %; the direction of the variation depends on the Normal state of the output and therefore on the dip-switch SW2.7 so that the commutation occurs exactly at the set value, leaving the effect of the hysteresis only at the reset.
• If the button is not released but continues to be pressed, after 2 seconds a continuous increment of 3% starts.
• Reached the maximum/minimum value of the chosen scale, the cycle starts again.
• During the regulation of the threshold, the auxiliary output follows the normal functioning, opening and closing, as previously set.
• After 5 seconds of button’s inactivity, the set value is memorized and the instrument continues with the normal functioning

Note:
The threshold may not be modified in case of internal fault. If the power supply is not sufficient during the regulation or before the 5 seconds of button’s inactivity are elapsed, the new value will not be memorized.

Details of Dip-Switch SW2.7

(*) In case of choice of direct output (0/4..20 mA), 0/1..5/10 V)

Installation rules

This module has been designed for assembly on a DIN 46277 rail. Assembly in vertical position is recommended in order to increase the module’s ventilation, and no raceways or other objects that compromise aeration must be positioned in the vicinity.
Do not position the module above equipment that generates heat; we recommend positioning the module in the lower part of the control panel or container compartment.
We recommend rail-type assembly using the corresponding bus connector (Code K-BUS) that eliminates the need to connect the power supply to each module.

Inserting the module in the rail

1. Attach the module in the upper part of the rail.
2. Press the module downwards. **

**

Removing the module from the rail

1. Apply leverage using a screwdriver (as shown in the figure).
2. Rotate the module upwards.
   

Using the K-BUS

1. Compose the K-BUS connectors as required in order to obtain the number of positions necessary (each K-BUS permits the insertion of no. 2 modules).
   

2. Insert the K-BUS connectors in the rail by positioning them on the upper side of the rail and then rotating them downwards

IMPORTANT: Pay particular attention to the poition of the protrudent terminals of the s K-BUS. The K-bus must be inserted in the guide with the protrudent terminals on the left (as shown in the figure) otherwise the modules are turned upside downs.

• Never connect the power supply directly to the bus connector on the DIN rail.
• Never tap power supply from the bus connector either directly or by using the module’s terminals.

SETTING OF THE DIP-SWITCHES

Factory setting

All the module DIP switches are at pos. 0 as default configuration. This set corresponds to the following default configuration :

• Thermocouple Type: J
• Line Rejection: 50 Hz
• Input Filter: Present
• Measurement Range: 0…1000 °C
• Output Signal: 4..20 mA
• Output Signal in case of fault: Towards the top of the output range
• Over-Range: YES: a 2.5% over-range value is acceptable; a 5% over-range value is considered a malfunction.

Auxiliary Output

• Threshold : 0% of the nominal scale

It is understood that this configuration is valid only with all the DIP switches at position 0. If also one Dip is moved, it is necessary to set all the other parameter as indicated on the following tables.

Note: for all following tables
The indication indicates that the DIP-switch is set in Position 1 (ON).
No indication is provided when the DIP-switch is set in Position 0 (OFF).

THERMOCOUPLE TYPE

SW1| 1| 2| 3|
| | | | J
| | | K
| | | R
| | | S
| | | T
| | **| B
| | | E
| | | N
LINE REJECTION**

SW1| 4|
| 60 Hz
| 50 Hz
*INPUT FILTER ()**

SW1| 5|
| Present
| Absent

*) The input filter stabilizes the measurement and guarantees the repeating of the disturbance signal overlapping the measurement signal but slows down the response time. If the maximum response speed is not required, it is advisable to insert it.

MEASUREMENT RANGE START

SW1| 6| 7| 8| J Type| K Type| R Type| S Type| T Type| B Type| E Type| N Type
| | | Default *| 0 °C| 0 °C| 0 °C| 0 °C| 0 °C| 0 °C| 0 °C
| | | 0 °C| 100 °C| 100 °C| 100 °C| 50 °C| 400 °C| 100 °C| 100 °C
| | | 100 °C| 200 °C| 200 °C| 200 °C| 100 °C| 500 °C| 200 °C| 200 °C
| | | 200 °C| 400 °C| 300 °C| 300 °C| 200 °C| 600 °C| 300 °C| 300 °C
| | | 300 °C| 600 °C| 400 °C| 400 °C| -50 °C| 800 °C| 400 °C| 500 °C
| | | 500 °C| 800 °C| 600 °C| 600 °C| -150 °C| 1000 °C| 500 °C| 700 °C
| | | -100 °C| -100 °C| 800 °C| 800 °C| -100 °C| 1200 °C| -100 °C| -100 °C
| | | -200 °C| -200 °C| 1000 °C| 1000 °C| -200 °C| 1400 °C| -200 °C| -200 °C

• If all the dip-switches are set to OFF position, the default configuration is valid; otherwise the value of this parameter is 0 °C, as for the other thermocouple types.

MEASUREMENT RANGE END

SW2| 1| 2| 3| J Type| K Type| R Type| Type S| T Type| B Type| E Type| N Type
| | | 1200 °C| 1350 °C| 1750 °C| 1750 °C| 400 °C| 1800 °C| 1000 °C| 1300 °C
| | | 1000 °C| 1200 °C| 1500 °C| 1500 °C| 350°C| 1600 °C| 800 °C| 1200 °C
| | | 800 °C| 1000 °C| 1300 °C| 1300 °C| 300 °C| 1500 °C| 600 °C| 1000 °C
| | | 600 °C| 800 °C| 1100 °C| 1100 °C| 250 °C| 1300 °C| 500 °C| 800 °C
| | | 500 °C| 700 °C| 900 °C| 900 °C| 200 °C| 1100 °C| 400 °C| 600 °C
| | | 400 °C| 500 °C| 700 °C| 700 °C| 150 °C| 900 °C| 300 °C| 500 °C
| | | 300 °C| 300 °C| 500 °C| 500 °C| 100 °C| 700 °C| 200 °C| 400 °C
| | | 200 °C| 200 °C| 300 °C| 300 °C| 50 °C| 500 °C| 100°C| 200 °C
OUTPUT

SW2| 4| 5| 6|
| | | | 4..20 mA
| | | 0..20 mA
| | | 20..4 mA
| | | 20..0 mA
| | | 0..10 V
| | | 1..5 V
| | | 10..0 V
| | | 0..5 V
OUTPUT SIGNAL IN CASE OF FAULT

SW2| 7|
| Towards the bottom of the output range
| Towards the top of the output range
*OVER-RANGE ()**

SW2| 8|
| NO: the malfunction alone causes a 2.5% over-range value.
| YES: a 2.5% over-range value is acceptable; a 5% over-range value is considered a malfunction.

(*) See the table below for the corresponding values.

Output Signal Limits

LED indications on the front

offset or reference . Error on reading or writing in flash (at the start or on threshold setting)| YES
Slow flashing| DIP-switch setting error| YES
Set Threshold in progress| NO (*)
Steady light| Disconnected thermocouple, out of range input or temperature compensation| YES
Output limiting in progress| NO

(*): In this modality the output signal represents the value of the threshold.

Electrical Connections

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.
   

Power supply

There are various ways to provide the K Series modules with power.

1. Direct power supply to the modules by connecting 24 Vdc power supply directly to Terminals 7 ( + ) and 8 ( – ) of each module.

2. Using the K-BUS connector accessory for the distribution of the power supply to the modules via bus connector, in this way eliminating the need to connect power supply to each module.
   The bus can be supplied from any of the modules; the total absorption of the bus must be less than 400 mA. Higher absorption values can damage the module. An appropriately sized fuse must be connected in series to the power supply.

3. Using the K-BUS connector accessory for the distribution of the power supply to the modules via bus connector and the K-SUPPLY accessory for the connection of the power supply. The K-SUPPLY accessory is a 6.2 mm wide module that contains a set of protections designed to protect the modules connected via bus against over-voltage loads.
   The bus connector can be provided with power using the K-SUPPLY module if the total absorption of the bus is less than 1.5 A. Higher absorption values can damage both the module and the bus.An appropriately sized fuse must be connected in series to the power supply.
   

Input

The module accepts input from the following types of thermocouples: J, K, E, N, S, R, B, T.
The use of shield cables is recommended for the electronic connections.

Output

Voltage connection – Current connection (applied current)
The use of shield cables is recommended for the electronic connections.

Auxiliary Output

The auxiliary output has been designed to pilot an indicator or a relay of greater power or the input of a supervisor control system.

Disposal of Electrical & Electronic Equipment (Applicable throughout the European Union and other European countries with separate collection programs)

This symbol, found on your product 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 and electronic equipment. By ensuring this product is disposed 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 this product, please contact your local city office, waste disposal service or thè retail store where you purchased this product.

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.
**| SENECA s.r.l.**

Via Austria, 26 – 35127 – PADOVA – ITALY
Tel. +39.049.8705355 – 8705359 – Fax +39.049.8706287
e-mail: info@seneca.it – www.seneca.it

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