MLC Catalog Specification Sheet

© Siemens AG 2015
Belt Scales
Milltronics belt scales
Milltronics MLC
■ Overview
■ Application
The MLC is suitable for monitoring such products as fertilizer,
tobacco, animal feed pellets, or sugar.
The MLC’s proven use of parallelogram style load cells results in
fast reaction to vertical forces, ensuring instant response to
product loading. This enables it to provide outstanding accuracy
and repeatability even with very light loading. The MLC may be
easily installed in existing flat belt conveyors or belt feeders.
Operating with Milltronics BW500, or SIWAREX FTC microprocessor-based integrators, the MLC provides indication of flow
rate, total weight, belt load and belt speed of bulk solids materials on a belt conveyor. A speed sensor monitors conveyor belt
speed for input to the integrator. When used in conjunction with
Milltronics BW500 integrator with PID controller, the MLC may
also be used in the food industry as part of a pre-feed control
system for extruders, cookers and de-hydrators.
Milltronics MLC is a low-capacity scale for light belt loading.
■ Benefits
•
•
•
•
•
•
4
Unique parallelogram style load cell design
Designed for light product loading
Compact and easy to install
System includes weighing idler
Stainless steel option
Low cost of ownership
Siemens WT 10 · Update 04/2015
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© Siemens AG 2015
Belt Scales
Milltronics belt scales
Milltronics MLC
■ Technical specifications1) 2)
Milltronics MLC
Milltronics MLC
Mode of operation
Load cell
Measuring principle
Strain gauge load cell measuring
load on flat belt conveyor idler
Typical application
Monitor fertilizer, tobacco, animal
feed pellets, sugar, cereal
Performance
Construction
17-4 PH (1.4568) stainless steel
construction with 304 (1.4301)
stainless steel cover
Degree of protection
IP67
Cable length
3 m (10 ft)
Accuracy1)
± 0.5 … 1.0 % of totalization over
25 … 100 % operating range
Excitation
10 V DC nominal, 15 V DC
maximum
Repeatability
± 0.1 %
Output
2 mV/V excitation at rated load cell
capacity
Non-linearity
0.03 % of rated output
Hysteresis
0.05 % of rated output
Non-repeatability
0.03 % of rated output
Capacity
10 or 20 lb
Overload
150 % of rated capacity, ultimate
300 % of rated capacity
Temperature
• -40 … +85 °C (-40 ... +185 °F)
operating range
• -10 … +60 °C (14 … 140 °F)
compensated
Mounting dimensions
Identical for all capacities
Hazardous locations
Consult the factory
Approvals
CE, RCM, GOST-R
Medium conditions
Max. material temperature
85 °C (185 °F)
Belt design
4
Belt width
• 450 … 1 200 mm
• 18 … 48 inch
Belt speed
2.0 m/s (400 fpm) maximum2)
Capacity
Up to 50 t/h (55 STPH)
Conveyor incline
• ± 20° from horizontal, fixed
incline
• Up to ± 30° with reduced
accuracy
Idlers
Conveyor idler
Horizontal
Idler diameter
50 or 60 mm (1.90 or 2.30 inch)
Idler spacing
0.5 … 1.5 m (1.6 … 5.0 ft)
1)
2)
Accuracy subject to: On factory approved installations the belt scale system’s totalized weight will be within the specified accuracy
when compared to a known weighed material test sample.
The test rate must be within the specified range of the design capacity and held constant for the duration of the test.
The minimum material test sample must be equivalent to a sample obtained at the test flow rate for three revolutions of the belt
or at least ten minutes running time, whichever is greater.
Contact Siemens application engineering ([email protected]) for consideration of higher belt speeds.
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Siemens WT 10 · Update 04/2015
© Siemens AG 2015
Belt Scales
Milltronics belt scales
Milltronics MLC
■ Selection and ordering data
Milltronics MLC belt scale
Low-capacity scale for light belt loading that comes
complete with a weighing idler.
Article No.
7MH71267777
Click on the Article No. for the online configuration in the PIA Life Cycle Portal.
Article No.
Belt Scale Application Guidelines
• English
7ML1998-5GA01
• French
7ML1998-5GA11
• German
7ML1998-5GA31
Belt width/Scale construction
• Spanish
7ML1998-5GA21
Polyester painted mild steel
Note: The operating instructions should be ordered
as a separate item on the order.
This device is shipped with the Siemens Milltronics
manual DVD containing the complete operating
instructions library.
18 inch (457 mm)
1A
24 inch (610 mm)
1B
30 inch (762 mm)
1C
36 inch (914 mm)
1D
42 inch (1067 mm)
1E
48 inch (1219 mm)
1F
500 mm (20 inch)
1G
650 mm (26 inch)
800 mm (32 inch)
1000 mm (39 inch)
Spare parts
Load cell, 10 lb (4.55 kg), 17-4 PH (1.4568) stainless
steel construction with 304 (1.4301) stainless steel
cover, includes hardware
7MH7725-1AA
7MH7725-1AB
1H
Load cell, 20 lb (9.09 kg), 17-4 PH (1.4568) stainless
steel construction with 304 (1.4301) stainless steel
cover, includes hardware
1J
Conduit replacement kit
7MH7723-1NA
1K
FDA conduit replacement kit
7MH7723-1QL
1200 mm (47 inch)
1L
450 mm (18 inch)
1M
Milltronics MLC calibration weight
[Stainless Steel 304 (1.4301)]
For scales with belt width of 18 inch or 500 mm or
450 mm
Stainless steel 304 (1.4301), bead blast finish
(1 ... 6 µm, 40 ... 240 µin)
2A
1.05 lb (0.47 kg)
7MH7724-1AL
24 inch (610 mm)
2B
1.63 lb (0.73 kg)
7MH7724-1AM
30 inch (762 mm)
2C
2.35 lb (1.06 kg)
7MH7724-1AN
36 inch (914 mm)
2D
3.21 lb (1.45 kg)
7MH7724-1AP
42 inch (1067 mm)
2E
For scales with belt width of 24 inch or 650 mm
48 inch (1219 mm)
2F
1.38 lb (0.62 kg)
7MH7724-1AQ
500 mm (20 inch)
2G
2.15 lb (0.97 kg)
7MH7724-1AR
650 mm (26 inch)
2H
3.11 lb (1.41 kg)
7MH7724-1AS
800 mm (32 inch)
2J
4.24 lb (1.91 kg)
7MH7724-1AT
1000 mm (39 inch)
2K
For scales with belt width of 30 inch or 800 mm
1200 mm (47 inch)
2L
1.72 lb (0.77 kg)
7MH7724-1AU
450 mm (18 inch)
2M
2.67 lb (1.21 kg)
7MH7724-1AV
3.85 lb (1.73 kg)
7MH7724-1AW
7MH7724-1AX
18 inch (457 mm)
Load cell capacity
10 lb (4.55 kg)
A
5.26 lb (2.37 kg)
20 lb (9.09 kg)
B
For scales with belt width of 36 inch or 1 000 mm
Not specified1)
X
Weighing idler dimensions
2.05 lb (0.92 kg)
7MH7724-1AY
3.19 lb (1.44 kg)
7MH7724-1BA
50 mm (1.96 inch)2)
1
4.56 lb (2.07 kg)
7MH7724-1BB
60 mm (2.40 inch)3)
2
6.29 lb (2.83 kg)
7MH7724-1BC
1.90 inch (48.2 mm)4)
5
For scales with belt width of 42 inch or 1 000 mm
Further designs
Order Code
Please add "-Z" to article no. and specify order
code(s).
Stainless steel tag [69 x 38 mm (2.7 x 1.5 inch)],
Measuring-point number / identification
(max 27 characters), specify in plain text.
Y15
Application Eng. reference number (max. 15 characters), specify in plain text.
Y31
2.38 lb (1.07 kg)
7MH7724-1BD
3.71 lb (1.67 kg)
7MH7724-1BE
5.35 lb (2.41 kg)
7MH7724-1BF
7.31 lb (3.29 kg)
7MH7724-1BG
For scales with belt width of 48 inch or 1 200 mm
2.72 lb (1.22 kg)
7MH7724-1BH
4.23 lb (1.92 kg)
7MH7724-1BJ
6.06 lb (2.75 kg)
7MH7724-1BK
7MH7724-1BL
Manufacturer's test certificate:
According to EN 10204-2.2
C11
FDA compliant version. Conduit and fittings
designed for food applications conforming to
FDA/USDA standards
K01
8.34 lb (3.75 kg)
Operating instructions
Article No.
Note: Calibration accessories should be ordered as
a separate item on the order
• English
7ML1998-5FF01
• German
A5E32007529
1)
Only for quotation purposes, not a valid ordering option.
2)
Available with belt width/scale contruction options 1G ... 1M, 2G ... 2M only.
3)
Available with belt width/scale options 1G ... 1M only.
4)
Available with belt width/scale contruction options 1A ... 1F, 2A ... 2F only
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© Siemens AG 2015
Belt Scales
Milltronics belt scales
Milltronics MLC
■ Dimensional drawings
MLC belt scale
Idler diameter C
(location of removed idler)
D
Installation
20.6
(0.81)
64 (2.5)
4 x Ø11 (0.44)
E
1)
Plan View
A
Front View
4
B
1) For pan supported belts, the belt should be cut out to allow the MLC and at least two (preferably four) other idlers to be installed.
Imperial designs [dimensions in inch (mm)]
Scale size
'A' roller width
'B' dimension
'C' dimension
'D' dimension
'E' dimension
18 (457)
18 (457)
19 (483)
1.90 (48.3)
6.19 (157)
3.5 (89)
24 (610)
24 (610)
25 (635)
1.90 (48.3)
6.19 (157)
3.5 (89)
30 (762)
30 (762)
31 (787)
1.90 (48.3)
6.19 (157)
3.5 (89)
36 (914)
36 (914)
37 (940)
1.90 (48.3)
6.19 (157)
3.5 (89)
42 (1 067)
42 (1 067)
43 (1 092)
1.90 (48.3)
6.19 (157)
3.5 (89)
48 (1 219)
48 (1 219)
49 (1 245)
1.90 (48.3)
6.19 (157)
3.5 (89)
Metric designs [dimensions in mm (inch)]
Scale size
'A' roller width
'B' dimension
'C' dimension
'D' dimension
'E' dimension
450 (17.72)
450 (17.72)
500 (19.69)
50 (1.97)
158 (6.22)
96 (3.78)
500 (19.69)
500 (19.69)
550 (21.65)
50 (1.97)
158 (6.22)
96 (3.78)
650 (25.59)
650 (25.59)
700 (27.56)
50 (1.97)
158 (6.22)
96 (3.78)
800 (31.50)
800 (31.50)
850 (33.46)
50 (1.97)
158 (6.22)
96 (3.78)
1 000 (39.37)
1 000 (39.37)
1 050 (41.34)
60 (2.36)
158 (6.22)
96 (3.78)
1 200 (47.24)
1 200 (47.24)
1 250 (49.21)
60 (2.36)
158 (6.22)
96 (3.78)
MLC, dimensions in mm (inch)
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Siemens WT 10 · Update 04/2015
© Siemens AG 2015
Belt Scales
Milltronics belt scales
Milltronics MLC
■ Schematics
A
A 5:1
Conduit and box
connector
Green 'B'
+ SIG 'A'
Shield 'B'
White 'B'
- SIG 'A'
Shield 'A'
Green 'A'
+ SIG 'B'
4
Customer junction box
Shield
White 'A'
- EXC
+ EXC
- SIG 'B'
Load cell
'B'
Red 'A'
Red 'B'
Black 'A'
Black 'B'
Load cell
'A'
To integrator
Note:
Conduit and cable arrangement may differ from example shown.
MLC connections
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