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General Description
The cores C1 PT-B instrument converts a temperature signal read by a PT100 probe
with connection by 2, 3 or 4 wires into a signal normalised in voltage or current.
Resolution 14 bit.
Technical Features
Power supply:
19,2..30 Vdc
Max 21 mA at 24 Vdc
Consumption:
Input:
PT100 probe,
EN60751/A2 (ITS90)
connection by 2, 3 or 4 wires
Current on sensor:
< 900 uA
Ω
Cable resistance:
Max. 20
per wire
Measurement Range:
-150-650 °C
Ω
Resistance range:
20 ..350
Minimum span :
50 °C
Voltage output:
0..5 Vdc, 1..5 Vdc, 0..10 Vdc and 10..0 Vdc
Ω
Minima load resistance: 2 K
Current output:
0..20 mA, 4..20 mA, 20..0 mA e 20..4 mA
Ω
Maximum load resistance: 500
Output in case of over-range:
102.5% of full scale value (see Table on Page 5)
Output in case of
105% of full scale value (see Table on Page 5)
malfunction:
Current output protection:
approximately
25 mA
D
Transmission error:
(40 K / temp + 0.05) % (Measurement range)
Temperature Coefficient:
100 ppm
Response time (10..90 %):
< 50 ms (without filter)
< 200 ms (with repeat filter 50 Hz)
Insulation Voltage:
1,5 KV (50 Hz for 1 min )
Protection Index:
IP20
Operating Conditions:
Temperature -20..+65 °C
Humidity 30..90 % at 40°C (non-condensing)
Storage Temperature:
-40..+85 °C
LED Signalling:
Setting error, connection malfunction, internal
malfunction
Connections:
Spring terminals
Conductor Section:
0,2..2,5 mm (AWG 26...14)
2
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Wire stripping:
8 mm
Box:
PBT (black colour)
Dimensions, Weight:
6,2 x 93,1 x 102,5 mm, 50 g.
Standards:
EN 61000-6-4 (electromagnetic emission, industrial
surroundings)
EN 61000-6-2 (electromagnetic immunity, industrial
surroundings)
EN61010-1 (safety)
All the circuits must be provided with double insulation
Y
from the circuits under dangerous voltage. The power
supply transformer must be built to compliance with
EN60742: "Insulation transformers and Safety
transformers".
Installation rules
This module has been designed for assembly on a EN 60715 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.
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Inserting the module in the rail
Removing the module from the rail
1 - Attach the module in the upper part of
1 - Apply leverage using a screwdriver (as
the rail.
shown in the figure).
2 - Press the module downwards.
2 - Rotate the module upwards.
SETTING OF THE DIP-SWITCHES
Factory setting
All the module DIP switches are at pos. 0 as defaut configuration.
This set correspond to the following configuration :
PT100 wiring
3 wires
Input Filter
present
Output Signal
4..20 mA
Measurement Range Start
0 °C
Measurement Full-Scale
100 °C
Output signal in case of
Towards the top of the output range
Malfunction
Over-Range
YES: a 2.5% over-range value is acceptable;
a 5% over-range value is considered a malfunction.
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).
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PT100 WIRING
SW1
1
2 / 4 wires
3 wires
INPUT FILTER (*)
SW1
2
Absent
Present
(*) The input filter slows down the response time to around 200 ms and guarantees the
repeating of the disturbance signal at 50 Hz overlapping the measurement signal.
OUTPUT SIGNAL
SW1
3
4 5
4..20 mA
0..20 mA
20..4 mA
20..0 mA
0..10 Vdc
10..0 Vdc
0..5 Vdc
1..5 Vdc
MEASUREMENT RANGE START
°C
SW1
6
7 8
0
-10
-20
-30
-40
-50
-100
-150
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MEASUREMENT FULL SCALE
6
6
SW2
SW2
SW2
1
1
1
2
2
2
3
3
3
4
4
4
5
5
5
6
6
6
°C
°C
°C
SW2
SW2
SW2
1
1
1
2
2
2
3
3
3
4
4
4
5
5
5
6
°C
°C
°C
SW2
SW2
SW2
1
1
1
2
2
2
3
3
3
0
0
0
120
120
120
5
5
5
130
130
130
10
10
10
140
140
140
15
15
15
150
150
150
20
20
20
160
160
160
25
25
25
170
170
170
30
30
30
180
180
180
35
35
35
190
190
190
40
40
40
200
200
200
45
45
45
210
210
210
50
50
50
220
220
220
55
230
60
240
65
250
70
260
75
270
80
280
85
290
90
300
95
310
100
320
110
330
OUTPUT SIGNAL IN CASE OF MALFUNCTION
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.
Over-range / Malfunction ± 2,5 %
Malfunction ± 5 %
Output signal limit
20 mA
20,5 mA
21 mA
4 mA
3,5 mA
3 mA
0 mA
0 mA
0 mA
10 Vdc
10,25 Vdc
10,5 Vdc
5 Vdc
5,125 Vdc
5,25 Vdc
1 Vdc
0,875 Vdc
0,75 Vdc
0 Vdc
0 Vdc
0 Vdc
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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.
2
0,2..2,5 mm
8 mm
5
OUTPUT
Power supply
6
+
There are various ways to provide the modules with
7
19.2..30 Vdc
power.
-
8
Direct power supply to the modules by
POWER
connecting 24 Vdc power supply directly to
SUPPLY
Terminals 7 ( + ) and 8 ( - ) of each module.
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Input
6
6
6
The module accepts input from a PT100 temperature probe with connection by 2, 3 or 4
4
4
4
5
5
5
°C
°C
°C
wires.
340
340
340
350
350
350
The use of shield cables is recommended for the electronic connections.
360
360
360
370
370
370
2-wire connection
380
380
380
This is the connection to be used for short distances ( < 10 m ) between module and probe,
390
390
390
bearing in mind that it adds an error equivalent to the resistance contributed by the
400
400
400
connection cables to the measurement.
410
410
410
DIP-switch SW1-1 set in Position 1 (ON) (2 / 4 wires).
420
420
420
With bridges between Terminals 1 and 2 and Terminals 3 and 4.
430
430
430
440
440
440
3-wire connection
450
This is the connection to be used for media-long distances ( > 10 m ) between module and
480
probe. The instrument performs compensation for the resistance of the connection cables.
In order for compensation to be correct, it is necessary that the resistance values of all
500
520
cables be equal because in order to perform compensation the instrument measures the
resistance of only one cable and assumes the resistance of the others cables to be exactly
550
the same.
580
DIP-switch SW1-1 set in Position 0 (OFF) (3 wires).
600
With bridge between Terminals 3 and 4.
620
650
4-wire connection
This connection to be used for media-long distances ( > 10 m ) between module and probe.
Provides the maximum precision because the instrument measure the resistance of the
sensor independently of the resistance of the connection cables.
DIP-switch SW1-1 set in Position 1 (ON) (2 / 4 wires).
PT100 4 wires
1
5
1
OUTPUT
2
6
2
3
INPUT
7
3
4
8
4
POWER
SUPPLY
The PT100 measure is effected in impulsive way for a very short time to reduce the
module consumption. For this reason, some electronic calibrators could not be able to
generate the simulated signal in the right way.
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Output
Voltage connection - Current connection (applied current)
The use of shield cables is recommended for the electronic connections.
+
5
1
V / I
-
OUTPUT
6
2
INPUT
7
3
8
4
POWER
SUPPLY
Note: in order to reduce the instrument's dissipation, we recommend either using the
Ω
output for voltage or guaranteeing a load of > 250
to the current output.
1
LED indications on the front
2
LED
Meaning
INPUT
Rapid flashing
Internal malfunction
3
1 pulse/sec.
Slow flashing
DIP-switch setting error
4
3 pulses/sec.
Steady light
PT100 connection wire malfunction. 3 wire resistance over-range.
Headquarters:
Phone +49 (9 51) 93 24-0
Wieland Electric GmbH
Fax +49 (9 51) 93 24-1 98
Brennerstraße 10 – 14
www.wieland-electric.com
D-96052 Bamberg
info@wieland-electric.com
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PT100 3 wires
PT100 2 wires
1
1
2
2
3
3
4
4
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rd
ENGLISH - 8/8
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