MODEL: LTCE
Power Transducer Series LT-UNIT
AC CURRENT TRANSDUCER
Functions & Features
• Converts alternating current from a current transformer
into a standard process signal
• Minimum ripple
• True RMS sensing
• Isolation up to 2000 V AC
• High-density mounting
• Conforms to IEC 60688
• CE marking
Typical Applications
• Centralized monitoring and control of motors, pumps or
heaters by DCS
• Monitoring power line and power supply current
39
(1.54)
143 (5.63)
111
(4.37)
mm (inch)
MODEL: LTCE–[1][2]–[3][4]
ORDERING INFORMATION
• Code number: LTCE–[1][2]-[3][4]
Specify a code from below for each [1] through [4].
(e.g. LTCE-5A-K3/T)
• Special output range (For codes Z & 0)
[1] INPUT
Current
1: 0 – 1 A AC
2: 0 – 2 A AC
5: 0 – 5 A AC
[2] OUTPUT
Current
A: 4 – 20 mA DC (Load resistance 500 Ω max.)
D: 0 – 20 mA DC(Load resistance 500 Ω max.)
F: 0 – 10 mA DC (Load resistance 1000 Ω max.)
G: 0 – 1 mA DC (Load resistance 10 kΩ max.)
J: 0 – 5 mA DC (Load resistance 2000 Ω max.)
Z: Specify current (See OUTPUT SPECIFICATIONS)
Voltage
1: 0 – 10 mV DC (Load resistance 10 kΩ min.)
2: 0 – 100 mV DC (Load resistance 100 kΩ min.)
3: 0 – 1 V DC (Load resistance 1000 Ω min.)
4: 0 – 10 V DC (Load resistance 10 kΩ min.)
5: 0 – 5 V DC (Load resistance 5000 Ω min.)
6: 1 – 5 V DC (Load resistance 5000 Ω min.)
0: Specify voltage (See OUTPUT SPECIFICATIONS)
[3] AUXILIARY POWER SUPPLY
AC Power
K3: 100 – 120V AC
(Operational voltage range 85 - 132 V AC, 47 - 66 Hz)
L3: 200 – 240V AC
(Operational voltage range 170 - 264 V AC, 47 - 66 Hz)
DC Power
R: 24 V DC
(Operational voltage range 24 V ±10 %, ripple 10 %p-p max.)
V: 48 V DC
(Operational voltage range 48 V ± 10 % , ripple 10 % p-p max.)
P: 110 V DC
(Operational voltage range 85 – 150 V, ripple 10 %p-p max.)
(CE not available)
[4] OPTIONS
Terminal cover
blank: Without
/T: With
GENERAL SPECIFICATIONS
Connection: M4 screw terminals (torque 1.2 N·m)
Screw terminal: Chrome-plated steel
Housing material: Flame-resistant resin (black)
Isolation: Input to output to power
Input waveform: Up to 15 % of 3rd harmonic content
Overrange output: 0 to 120 % at 1 – 5 V
Zero adjustment: -5 to +5 % (front)
Span adjustment: 95 to 105 % (front)
INPUT SPECIFICATIONS
Frequency: 50 or 60 Hz
Operational range: 0 – 120 % of rating
Overload capacity: 4000 % of rating for 1 sec., 2000 % for 4
sec.,
120 % continuous
Input burden:
0.1 VA (input 0 – 1 A)
0.2 VA (input 0 – 2 A)
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CH - 5453 Busslingen
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Fax +41 (0)56 222 10 12
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MODEL: LTCE
0.5 VA (input 0 – 5 A)
CURRENT [%]
5
2000 4000
10
0
TIME [s]
• Overload Capacity
OUTPUT SPECIFICATIONS
• DC Current: 0 – 20 mA DC
Minimum span: 1 mA
Offset: Max. 1.5 times span
Load resistance: Output drive 10 V max.
• DC Voltage: 0 – 12 V DC
Minimum span: 5 mV
Offset: Max. 1.5 times span
Load resistance: Output drive 1 mA max.; at ≥ 0.5 V
5
OUT
10V
■ OPERATION DIAGRAM (example)
0
2.5 5A
IN
0
12
OUT
20mA
4
2.5 5A
IN
0
INSTALLATION
Power Consumption
•AC Power input: Approx. 2 VA
•DC Power input: Approx. 1.7 W (15 mA at 110 V)
Operating temperature: -10 to +55°C (14 to 131°F)
Operating humidity: 30 to 85 %RH (non-condensing)
Mounting: Surface or DIN rail
Weight: 400 g (0.88 lbs)
PERFORMANCE in percentage of span
Accuracy: ±0.5 % (at 23°C ±10°C or 73.4°F ±18°F,
45 – 65 Hz)
Magnetic field (ext. origin) effect: ± 0.5 % (400 A/m)
Response time: ≤ 1 sec. (0 – 100 % ±1 %)
Ripple: 0.5 %p-p max.
Line voltage effect: ±0.25 % over voltage range
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 2000 V AC @1 minute
(input to output to power to ground)
Impulse withstand voltage: 1.2 / 50 μsec., ±5 kV
(input to output or ground)
STANDARDS & APPROVALS
CE conformity:
EMC Directive (2004/108/EC)
EMI EN 61000-6-4
EMS EN 61000-6-2
Low Voltage Directive (2006/95/EC)
EN 61010-1
Measurement Category II (input, output)
Installation Category II (power)
Pollution Degree 2
Input to output or power: Reinforced insulation (550 V)
Output to power: Reinforced insulation (300 V)
IEC Standard: IEC 60688
Rugghölzli 2
CH - 5453 Busslingen
Tel. +41 (0)56 222 38 18
Fax +41 (0)56 222 10 12
www.sentronic.com
Produkte, Support und Service
SEN
TRONIC
AG
MODEL: LTCE
CONNECTION DIAGRAM
+
–
OUTPUT
4
5
1
2
LOAD
SOURCE
k
l
CT
L
K
U(+)
V(–)
6
7
POWER
EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)
5
4
6 7
1 2 3
[4 (.16)]143 (5.63)
DIN RAIL
35mm wide
8 (.31)
27 (1.06)
39 (1.54)
• When mounting, no extra space is needed between units.
98 (3.86)
80 (3.15)
111 (4.37)
2–M4 MTG HOLE
7–M4 SCREW
10 (.39)
3
(.12)
TERMINAL COVER (option /T)
Specifications are subject to change without notice.
Rugghölzli 2
CH - 5453 Busslingen
Tel. +41 (0)56 222 38 18
Fax +41 (0)56 222 10 12
www.sentronic.com
Produkte, Support und Service
SEN
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AG
LTCE
P. 1 / 2EM-3351 Rev.5
AC CURRENT TRANSDUCER
MODEL
LTCE
INSTRUCTION MANUAL
BEFORE USE ....
Thank you for choosing M-System. Before use, please check
contents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact M-System’s Sales Office or representatives.
■ PACKAGE INCLUDES:
Signal conditioner ......................................................... (1)
■ MODEL NO.
Confirm Model No. marking on the product to be exactly
what you ordered.
■ INSTRUCTION MANUAL
This manual describes necessary points of caution when
you use this product, including installation, connection and
basic maintenance procedures.
POINTS OF CAUTION
■ CONFORMITY WITH EC DIRECTIVES
• This equipment is suitable for use in Pollution Degree
2 environment and in Installation Category II, with the
maximum operating voltage 550V for input to output or
power, and 300V for output to power.
Prior to
installation, check that the insulation class of this
unit satisfies the system requirements.
• Altitude up to 2000 meters
•
The equipment must be mounted inside a panel.
• Insert noise filters for the power source, input and output
connected to the unit. COSEL Model NAC-04-472, TDK
Model ZCAT 3035-1330 or equivalent is recommended.
•
The
equipment must be installed such that appropriate
clearance and creepage distances are maintained to con-
form to CE requirements. Failure to observe these re-
quirements may invalidate the CE conformance.
■ POWER INPUT RATING & OPERATIONAL RANGE
•
Locate
the power input rating marked on the product and
confirm its operational range as indicated below:
100 – 120V AC rating: 85 – 132V, 47 – 66 Hz, approx. 2VA
200 – 240V AC rating: 170 – 264V, 47 – 66 Hz, approx. 2VA
24V, 48V DC rating: Rating ±10%, approx. 1.7W
110V DC rating: 85 – 150V, approx. 1.7W
■ GENERAL PRECAUTIONS
• Before
you remove or mount the unit, turn off the power
supply and input signal for safety.
■ ENVIRONMENT
• Indoor use
•
When heavy dust or metal particles are present in the air,
install the unit inside proper housing with sufficient ven-
tilation.
• Do
not install the unit where it is subjected to continuous
vibration. Do not subject the unit to physical impact.
• Environmental
temperature must be within -10 to +55°C
(14 to 131°F) with relative humidity within 30 to 85% RH
in order to ensure adequate life span and operation.
■ WIRING
• Do not install cables (power supply, input and output)
close to noise sources (relay drive cable, high frequency
line, etc.).
• Do
not bind these cables together with those in which
noises are present. Do not install them in the same duct.
■ AND ....
• The
unit is designed to function as soon as power is sup-
plied, however, a warm up for 10 minutes is required for
satisfying complete performance described in the data
sheet.
COMPONENT IDENTIFICATION
INSTALLATION
■ DIN RAIL MOUNTING
Set the unit so that its DIN rail adaptor is at the bottom.
Position the upper hook at the rear side of the unit on the
DIN rail and push in the lower. When removing the unit,
push down the DIN rail adaptor utilizing a minus screw-
driver and pull.
■ WALL MOUNTING
Refer to “EXTERNAL DIMENSIONS.”
Body
Connection
Diagram
Zero Adjustment
Span Adjustment
Specifications
DIN Rail
35mm wide
Spring Loaded
DIN Rail Adaptor
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CH - 5453 Busslingen
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Fax +41 (0)56 222 10 12
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Produkte, Support und Service
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AG
LTCE
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the con-
nection diagram on the side of the unit.
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Power
input voltage: Check voltage across the terminal
6 – 7 with a multimeter.
3) Input: Chec
k that the input signal is within 0 – 100% of
full-scale.
4) Output:
Check that the load resistance meets the de-
scribed specifications.
ADJUSTMENT PROCEDURE
This unit is calibrated at the factory to meet the ordered
specifications, therefore you usually do not need any cali-
bration.
For matching the signal to a receiving instrument or in case
of regular calibration, adjust the output as explained in the
following.
■ HOW TO CALIBRATE THE OUTPUT SIGNAL
Use a signal source and measuring instruments of sufficient
accuracy level. Turn the power supply on and warm up for
more than 10 minutes.
1)
ZERO:
Apply 0% input and adjust output to 0%.
2) SPAN: Apply 100% input and adjust output to 100%.
3) Check ZERO adjustment again with 0% input.
4) When ZERO value is changed, repeat the above proce-
dure 1) – 3).
MAINTENANCE
Regular calibration procedure is explained below:
■ CALIBRATION
Warm up the unit for at least 10 minutes. Apply 0%, 25%,
50%, 75% and 100% input signal. Check that the output
signal for the respective input signal remains within accu-
racy described in the data sheet. When the output is out of
tolerance, recalibrate the unit according to the “ADJUST-
MENT PROCEDURE” explained earlier.
EXTERNAL DIMENSIONS unit: mm (inch)
+
–
OUTPUT
4
5
1
2
LOAD
SOURCE
k
l
CT
L
K
U(+)
V(–)
6
7
POWER
5
4
6 7
1 2 3
[4 (.16)]143 (5.63)
DIN RAIL
35mm wide
8 (.31)
27 (1.06)
39 (1.54)
• When mounting, no extra space is needed between units.
98 (3.86)
80 (3.15)
111 (4.37)
2–M4 MTG HOLE
7–M4 SCREW
10 (.39)
3
(.12)
TERMINAL COVER (option /T)
Rugghölzli 2
CH - 5453 Busslingen
Tel. +41 (0)56 222 38 18
Fax +41 (0)56 222 10 12
www.sentronic.com
Produkte, Support und Service
SEN
TRONIC
AG
/