MAGTROL LMU 116 Load Monitoring Unit Data Sheet

M AGTROL
LMU 116
Data Sheet
LMU 116
Load Monitoring Unit
FEATURES
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For Use with Full-bridge Strain Gauge Transducers
(Sensitivity 0.5 to 2 mV/V)
Voltage Input for Different Charge Summation
Summer with 4 Inputs
Taring Facility
4 Level Detectors with Relay Output Contacts
including 2 with Programmable Memory
0 to 20 mA DC Current Output
Three ±10 V Voltage Outputs
Provides Continuous Detection of Signal Line Failure
and Short Circuits
Compatible to CE Standards
IP 66 Aluminium Housing
DESCRIPTION
both (see “Application Selection” at bottom of page 2). A
The Magtrol LMU Load Monitoring Unit is specially designed
built-in self-test system detects any short circuits or signal line
for strain gauge transducer applications. It is flexible and fully
failures, thus allowing the system to
configurable due to DIP-switches and
be used in applications where safety
jumpers which allow the unit to be
easily installed—no solder connections The LMU 116 is used with Magtrol Load is important. If a problem is detected,
Measuring Pins which measure load and
both relays are deactivated and the
are required.
force and provide overload protection.
output voltage (respective current)
The LMU 116 contains 1 full-bridge Magtrol also offers a wide range of changes to >10 VDC (>20 mA).
Load-Force-Weight Transducers in various
strain gauge transducer input, 1 voltage
executions and accuracy classes and our
input, 4 level detectors (output contacts, Digital Process Monitors/Signal Conditioners The LMU is fully compatible with
2 with programmable memory), 1 measure and display load, force and weight European Community (CE) standards.
current output, 3 voltage outputs and 2 from signals generated by strain gauge Its IP 66 aluminium housing allows
the system to be used in harsh
“OK” self-test signals for monitoring transducers.
environments. Using SMD (surface
the correct operation while running
mounted device) technology, the LMU
several LMU units simultaneously.
allows the maximum performance/price ratio for strain gauge
The level detectors and the outputs can be dedicated either
transducer monitoring.
to the full-bridge input, to the voltage input or to the sum of
SYSTEM CONFIGURATION
Summer with 4 Voltage Inputs (±10 V)
Strain Gauge
Transducer
Voltage Input ±10 V
"OK" Input (OK I/P)
Power Supply
• 115 / 230 VAC (50/60 Hz) OR
• 20 to 32 VDC
1
LMU 116
Output Contacts of Relay RE1
Output Contacts of Relay RE2
Output Contacts of Relay RE3
Output Contacts of Relay RE4
"OK" Output (OK O/P)
Current Output 0 to 20 mA
3 Voltage Outputs ±10 V
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Specifications
INPUT CHARACTERISTICS
Power Supply
115/230 VAC (50/60 Hz) or
Voltage
20 to 32 VDC, jumper selectable
Current
Fuse Rating
70 mA for 230 VAC
80 mAT
Maximum Current
150 mA for 115 VAC 160 mAT
250 mA for 20 VDC 400 mAT
Bridge Signal
Supply Voltage
10 VDC
Max. Possible Current
150 mA DC
Sensitivity
0.5 to 2 mV/V
Max. Dynamic Component
±30 mV DC
of Bridge Signal
Max. Common Mode
±10 V
Voltage on Input
Voltage Input for Summation of Another Load
Input Impedance
200 kΩ
Max. Input Signal
±10 V
(dynamic)
Input for Self-Test Feature (OK I/P)
Type
Active if short circuited
OUTPUT CHARACTERISTICS
Relay Outputs
Number
2 (RE 1; RE 2)
Normal State
Normally energized
5 A continuous / break
Max. Current per Contact
20 A on startup
AC: 250 Vrms
Max. Voltage per Contact
DC: 350 VDC
Max. Break Power
100 W or 1000 VA
Contact-Contact: 750 Vrms
Insulation Voltage
Contact-Coil: 1.5 kVrms
Lifetime
> 2 × 108 switchings
Contact Resistance
< 20 mΩ
Current Output
Output Type
Current generator
Nominal Current Range 0 to 20 mA DC
Max. Current Range
0 to 25 mA DC
Max. Load
< 500 Ω for Imax = 20 mA
Output Impedance
> 50 kΩ
Voltage Output
Max. Value
±10 V ≡ FSD
Max. Load
≥10 kΩ(ε≤1%)[≥2 kΩ(ε≤5%)]*
Output Impedance
100 Ω (in series)
Output for Self-Test Feature (OK O/P)
Open collector
Type
(short circuit-proof)
* Refer to NOTE on following page.
2
LMU 116
TRANSFER CHARACTERISTICS
Voltage Transfer Ranges (∆UI/P / ∆UO/P)
Range
1
2
3
Bridge Sensitivity 0.42 to 0.78 0.7 to 1.3 1.2 to 2.2
[mV/V]
(0.6)
(1)
(1.7)
Voltage Transfer 2380 to 1280 1428 to 769 833 to 455
(gain)
(1670)
(1000)
(588)
Adjustment Range
±30%
±30%
±30%
Range Selection
Using DIP-switches
Coarse adjustment using multiturn potentiometer: equivalent
to ± 10 V/output for Range 3
Zero Adjustment for
Measuring Chain
Fine adjustment using multiturn potentiometer: 5% of the
coarse adjustment
Temperature Drift of
Transfer Function
≤ 200 ppm/°C
Temperature Drift of 0
≤ 200 ppm of FSD/°C for range
0.5 mV/V ≡ ≤1 µV/°C
Current Transfer Range
Sensitivity Range with
± 20% of FSD on UO/P
Multi-turn Potentiometer
Nominal Current Range 0 to 20 mA DC
Max. Current Range
0 to 25 mA DC
Zero Adjustment Range ± 5 mA DC for IO/P ≥ 5 mA DC
Selectable Low-Pass Filter
Filter Type
Butterworth
Filter Order
2nd
Selectable using DIP-switches
-3dB Cut-off Frequency
to 0.3 Hz; 1 Hz; 3 Hz; 10 Hz
Transfer Function
Between Summing Input/ 1
Voltage Output
Level Detectors
Number of Detectors
2 (REL1; REL2)
-10 to +10 VDC using multi-turn
Level Adjustment Range potentiometer (measured on
voltage output)
0 or ≈ 5%
Hysteresis
(selectable using DIP- switches)
< or >
Detection Indication
(selectable using DIP-switches)
Switching Delay
Number of Circuits
2
0 to 5 seconds using multi-turn
Delay Adjustment Range
potentiometer
Application Selection
Selection Det. REL1 Det. REL2
1
A
A
2
A+B
A
3
A
A+B
4
A+B
A+B
5
B
B
6
A+B
B
A = Bridge signal; B = Voltage input
UO/P, I O/P
A
A+B
A
A+B
B
A+B
M AGTROL
Specifications
MECHANICAL CHARACTERISTICS
Housing
Material
Aluminum
Weight
≈3 kg; ≈6.61 lb
Stuffing Glands
Number and Type
Material
Terminal Strip
6 × PG 11
Nickel-plated brass
Type
Max. Area of
Connecting Wire
MK8 (screw at 45° and
connection at 45°)
AWG 20 to 16
Cross-section: 0.5 to 1.5 mm²
(≈0.00077 to 0.0023 in²)
LMU 116
ENVIRONMENTAL CHARACTERISTICS
Operating Temperature
-40°C to +80°C
Storage Temperature
-45°C to +85°C
Protection Class
IP 66
Vibration and Shock
According to IEC 68.2
According to EN-58081-2
(Generic Emission Standard)
EMC
and EN-58082-2
(Generic Immunity Standard)
* NOTE: In order to guarantee a precise calibration, the customer
is asked to indicate the impedances of the connected
unit together with the order. If this value is unknown,
an impedance of 1 MΩ will be used for calibration. The
resulting deviation will be in the order of ≤5% with an
impedance of ≥2 kΩ or ≤1% with ≥10 kΩ.
MONITORING MODULE SPECIFICATIONS
SUMMER
Number of Inputs
Input Voltage
Output Voltage
LEVEL DETECTOR
Number of Detectors
Level Adjustment Range
Hysteresis
Direction Indication
4 (UA, UB, UC and UD)
±10 V
UE1 = (UA + UB ± UC ± UD)X
factor X adjustable between
0.25 and 10
2 (REL3, REL4)
±10 VDC using multi-turn
potentiometer (measured on
voltage output)
0 or ≈5%
(selectable using DIP-switches)
< or >
(selectable using DIP-switches)
SWITCHING DELAY
Number of Circuits
RELAY OUTPUT MEMORIZATION (LATCH)
Control
Using DIP-switches
Reset Signal
RESET REL3, RESET REL4
TARING CIRCUIT
Volatile digital 12-bit memory*
(reset when the unit is switched on),
the stored digital value is subtracted
Principle
from the D/A converted input signal.
* Current interruptions lasting for less
than 30 ms do not cause the loss of the
stored tare value.
Resolution
Storing Time
Output Impedence
Acceptable Load
Resistance
1/4096 of the selected range
<2s
< 200 Ω
≤ 20 kΩ
2
0 to 5 s, using multi-turn
Delay Adjustment Range
potentiometer
LMU 116 CONFIGURATION
The LMU 116 Load Monitoring Unit offers unlimited configuration possibilities. It is impossible to list them all in this data
sheet. Please contact Magtrol or one of its subsidiaries or sales agents to discuss your specific applications.
3
M AGTROL
4
Drawing continued on page 5
S/N :
P/N : 224-116-000-02X
LMU 116
Configuration and Calibration Report
LMU 116
M AGTROL
Drawing continued on page 4
CONFIGURATION AND CALIBRATION
REPORT FOR LMU 116 VERS. 02X
DWG. Nr. :
5
PZ 6570
SWITZERLAND
Configuration and Calibration Report
LMU 116
M AGTROL
Dimensions and Ordering Information
LMU 116
DIMENSIONS
UUU
K
M
N
P
P
P
N
N
FRONT VIEW
H
SIDE VIEW
Mounting Screw
M6×30
Sealed Diecast
Aluminum Box Protection Class
IP 66
D
F
C
NOTE: Original
dimensions are in Metric
units. Dimensions
converted to English
units have been rounded
up to 2 decimal places.
E
B
A
mm
287
272
190
175
≈18
≈220
12
10
90
27
30
35
A
B
C
D
E
F
H
J
K
M
N
P
in
11.30
10.71
7.48
6.89
0.71
8.66
0.47
0.39
3.54
1.06
1.18
1.38
OVERHEAD VIEW
ORDERING INFORMATION
LMU 116 LOAD MEASURING UNIT
P/N 224-116-000-0
Includes balancing comparator sub-module?
• No
21
• Yes
61
Includes setup and calibration?
• No, standard module with no setup and no calibration
(blank)
• Yes, according to the configuration and calibration report PZ 6570
(To be filled in according to the application)
C
Due to the continual development of our products, we reserve the right to modify specifications without forewarning.
www.magtrol.com
Worldwide Network
of Sales Agents
Magtrol SA ISO 9001:2000 certified
SWISS
TI
ISO 9001
ON
Route de Moncor 4B
1701 Fribourg, Switzerland
Phone: +41 (0)26 407 3000
Fax: +41 (0)26 407 3001
E-mail: [email protected]
Subsidiaries in:
• Germany
• France
• Great Britain
CER
70 Gardenville Parkway
Buffalo, New York 14224 USA
Phone: +1 716 668 5555
Fax: +1 716 668 8705
E-mail: [email protected]
MAGTROL SA
TI
MAGTROL INC
FIC A
LMU116DS-US www 03/04
N
J
UUU
Stuffing Glands (PG 11 max.)
Ø cable: 5 to 12 mm (≈0.20" to 0.47")