Instructions
WARNING
PERSONAL INJURY
DO NOT USE these products as safety or emergency stop
devices or in any other application where failure of the
product could result in personal injury.
Failure to comply with these instructions could result in
death or serious injury.
008341-2-EN | 2 | 05/21
© 2021 Honeywell International Inc.
PRODUCT NOMENCLATURE
WARNING
MISUSE OF DOCUMENTATION
• The information presented in this document is for
reference only.
Do not use this document as a product installation guide.
• Complete installation, operation, and maintenance
information is provided in the instructions supplied with
each product.
Failure to comply with these instructions could result in
death or serious injury.
The FMA Series may be used in industrial knitting machines to monitor the yarn/thread
tension, helping to provide feedback for precise control.
S
Sphere
FM
1
A M S D XX 025
2
W C S C
3
3
MicroForce
Sensors
CouplingType
Supply
Voltage
Output
A
W
Newton (N)
Contact
Element
Option
Code
Force
Range
Force
Type
Transfer
Function
Compensated/
amplified
M
Mechanical
Option
Code 1
Force
Unit
C
XX
Future placeholder
Compression
3.3 V
+
10%
5.0 V
+
5%
3
5
A
C
10% to 90%
20% to 80%
SPI
I
2
C, Address 0x28
I
2
C, Address 0x38
I
2
C, Address 0x48
I
2
C, Address 0x58
I
2
C, Address 0x68
I
2
C, Address 0x78
1
Custom configurations are available upon request. Please contact Honeywell Sales.
2
Three characters specify the desired force level; allowable characters are the numbers 0 through 9 for currently configurable force ranges.
3
For other available transfer functions, contact Honeywell Customer Service.
S
2
3
4
5
6
7
005
015
025
5 (Newtons)
15 (Newtons)
25 (Newtons)
No diagnostics
Sensor short and open diagnostics
N
D
FMA SERIES SPECIFICATIONS
CHARACTERISTIC PARAMETER
Description compensated/amplified
Force range 5 N, 15 N, 25 N
Output SPI, I
2
C
Supply voltage 3.3 V, 5.0 V
Supply current, typ. 2.8 mA (3.3 V), 3.9 mA (5.0 V)
Operating temperature
range
-40ºC to 85ºC
[-40ºF to 185ºF]
Compensated temperature
range
5ºC to 50ºC
[41ºF to 122ºF]
Accuracy, typ. ±2% FSS BFSL
Total Error Band, max. ±8% FSS BFSL
Output resolution 12 bits
Long term stability ±1.6 FSS
Humidity
0% to 95% RH,
non-condensing
Shock
MIL-STD-202, Method 213,
Condition A (50 G)
Vibration
MIL-STD-202, Method 214,
Condition 1F (20.71 Gms)
Life
1 million full scale force cycles
minimum
Package size 5 mm x 5 mm [0.20 in x 0.20 in]
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
• Used in thread tension monitoring
feedback loop to ensure correct amount
of force is being applied under all
conditions
• Provides more accurate control of the
feedback loop where response time
is critical
• Provides multiple digital addresses on
the same bus
• Monitors many different thread tensions
at once
• Minimizes thread tension concerns,
resulting in less scrap due to garments
ruined by incorrect thread tension
• Minimizes machine downtime due to
broken threads
• Small size allows many sensors to fit into
small space
• Cost-effective solution to the load cell
sensors that are usually used to measure
thread tension
FMA SERIES MICROFORCE SENSORS
FOR USE IN INDUSTRIAL KNITTING MACHINES
The FMA Series piezoresistive-based force sensors offer a digital output for reading
force over the specified full scale force span and temperature range. They are fully
calibrated and temperature compensated for sensor offset, sensitivity, temperature
effects, and nonlinearity using an on-board Application Specific Integrated Circuit
(ASIC).
The direct mechanical coupling allows for easier interface with the sensor (using
tubing, membrane or a plunger), providing repeatable performance and a more reliable
mechanical interface to the application. These sensors offer a more stable output which
is directly proportional to the force applied to the mechanically-coupled sphere.
The digital I
2
C interface permits multiple addresses on the same bus, allowing the use
of multiple sensors and helping to reduce system complexity. The optional internal
diagnostics function enables fault detection.
FMA Series
Sensor optimized to be as small as possible
while still allowing for mechanical coupling.
Honeywell
Advanced Sensing Technologies
830 East Arapaho Road
Richardson, TX 75081
sps.honeywell.com/ast