Microcontroller Unit (MCU)
LCD Hour Meters/Counters
LM Series
Datasheet
Page 2
LM Series
Microcontroller Unit (MCU) LCD Hour Meters/Counters
Honeywell’s MCU (microcontroller unit) LCD (liquid crystal display) Hour Meters and Counters, LM Series, are sealed digital
instruments designed to monitor and record elapsed running time, normally displayed in hours and tenths of hours. These devices
are used to log running time of equipment or counts of equipment use for potential use in transportation applications to assure
proper maintenance of expensive machines or systems, as well as warranty claims and rental-use tracking. This maintenance
typically involves replacing, changing, or checking parts, belts, lters, oil, and lubrication of heavy duty equipment, or running
condition of engines, motors, and blowers, to name a few.
These devices can feature up to a 40-year memory data retention (without power) to provide customers with a long data retention
capability within their desired application. The large 7 mm display eases readability and offers backlight options and a running
indicator. Sealing to IP67 (front)/IP66 (rear) designed to provide enhanced durability. The hour meter also features a long reset time
to offer customers the protection against malfunction of reset.
The LM Series offers customization options including the customer’s logo, Honeywell logo, or a black face, as well as numerous
customizable bezel options.
What makes our hour meters/counters better?
Backlighting and large display ease readability
IP67 (front) and IP66 (rear) rating provides enhanced durability
Longer reset time can minimize the possibility of a reset
malfunction
Multiple bezel options allow for different aesthetic looks and
accommodates various space requirements
Optional bending terminal blades allow for use where space
is at a premium
Manufactured for harsh,
rugged environments
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Features
Features
and Benefits
and Benefits
Great for tracking rental product use!
Up to 40 years of data retention without power!
EASY TO READ
The large 7 mm display on LM Series hour meters/counters eases readability and
offers options of backlight and running indicators.
RELIABLE AND DURABLE
The LM Series’ IP67 (front)/IP66 (back) environmental sealing creates a rugged
package design well suited for harsh environments. The mounting assembly’s
durable design helps make installation accurate and efficient. Their shock and
vibration resistance allows for use in a wide variety of heavy-duty applications.
CUSTOMIZABLE
LM Series hour meters/counters can be customized with the customer’s logo,
as well as numerous customizable bezel options. Meters are offered with
two function types: hour meter (measures time) or counter (measures number of
instances, starts, etc.). Optional bending terminal blades allow for use where
space is at a premium.
Potential Applications
TRANSPORTATION
Monitors and records elapsed running time in
• Agricultural vehicles
• Blowers
• Engines
• Heavy-duty construction vehicles
• Heavy-duty trucks
• Material-handling equipment
• Mowers
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LM Series
Table 1. Specifications
CharacteristicParameter
Digital range hours0 to 99,999.9 hours with auto turn over
Digital range counts0 to 999,999 counts with auto turn over
Digital height7 mm
Backlight color (optional)blue
View angle12 o’clock
Running indicatoryes
Accuracy±200 ppm/hour
Operating voltage range9 V to 64 V dc/ac (50 Hz to 500 Hz); 50 Hz for counter enable
SealingIP67 (front); IP66 (back)
Shock55 g per SAE J1378; 75 g per MIL-M-3917D
Vibration20 g per SAE J1378; 10 g per MIL-M-3917D
Humidity95 % non-condensing at 38 °C [100.4 °F]
Operating temperature-40 °C to 85 °C [-40 °F to 185 °F]
Storage temperature-50 °C to 90 °C [-58 °F to 190 °F]
load dump – yes
Transient immunity
Power consumption0.8 mA @ 12 Vdc
Panel mountingmultiple options, dependent upon bezel shape
Start time<1 s; if including all “8” check, then >1 s
Material – caseMakroblend
Material – lensLexan
Case depth1.35 in (including terminals)
Termination1/4 in blade (straight and bending); 3/16 in blade (straight and bending)
inductive – yes
EMI – yes
reverse polarity – yes
®
®
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Microcontroller Unit (MCU) LCD Hour Meters/Counters
MCU (Micr
PRODUCT NOMENCLATURE
LM
Type
LM Series
controller
Unit)
LCD Hour
Meter
—
o-
H
C
H
Function
Type
Hour meter
Counter
Shape and
Bezel
Shape: Diamond
H
Bezel: Black
Shape: Standard
S
Shape: Round
B
Bezel: Black
Shape: Round
W
Bezel: Chrome
Shape: Diamond
D
Bezel: None
Shape: Rectangle
C
H
F
Connector
Definition
+ : Positive
- : Negative
F
B : Backlight (blue)
E : Enable
+ : Positive
- : Negative
4
R : Reset
E : Enable
+ : Positive
- : Negative
3
E : Enable
+ : Positive
2
- : Negative
Terminal
A
3/16 in blade
C
1/4 in
M
bending blade
3/16 in
N
bending blade
A
Type
1/4 in blade
S
Table 2. Modification Codes
Modification
Code
Product
Shape
Box/Meter Wrap/
Marking
Hour Meter
Terminal
Fastenings Product Qty
Wires
11
12No fastenings included
13
Diamond,
Standard,
Rectangle
Bulk pack, no box
marking
14No fastenings included
21
22No fastenings included
23
24No fastenings included
Diamond,
Standard,
Rectangle,
Round
Box per product,
box marked with
part number
31
32No fastenings included
33
Round
Bulk pack, no box
marking
34No fastenings included
1 wire per
terminal
No wires
included
1 wire per
terminal
No wires
included
1 wire per
terminal
No wires
included
Included
Included
Included
Included
Included
Included
S
Voltage
Range
9 Vdc/Vac to
64 Vdc/Vac
—
H
Logo
Type
Honeywell
H
No logo
N
Hours
T
indicator
Customer’s
1
logo #1
Customer’s
2
logo #2
NOTE: Codes “1” to “9”
and “A” to “Z” (except
“H”, “N”, and “T”) are
defined for customers’
different logo/type
requirements.
Per Carton(s)
96 pieces per
carton
24 pieces per
carton
48 pieces per
carton
XX
Modification
Code
Multiple packaging
and component options
are recommended.
Type 11: Bulk packing
with wires and
fasteners.
Type 21: Box per
product packing with
wires and
fasteners.
Please refer to
Honeywell modification
code, or contact
your Honeywell sales
representative, or an
authorized Honeywell
Distributor.
See Table 2 (below)
for specific details.
Instruction
Sheet Qty
1
24
1
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LM Series
LM SERIES ORDER GUIDE
Catalog ListingFunctionShapeBezelConnectors
LM-CS3CS-N11CounterStandard–33/16 in bladeNone
LM-CS3CS-N13CounterStandard–33/16 in bladeNone
LM-CS3CS-N21CounterStandard–33/16 in bladeNone
LM-CS3CS-N22CounterStandard–33/16 in bladeNone
LM-CS3CS-N23CounterStandard–33/16 in bladeNone
LM-CS4AS-N11CounterStandard–4 (reset)1/4 in bladeNone
LM-HB2AS-H31Hour MeterRoundBlack21/4 in bladeHoneywell
LM-HB3AS-H31Hour MeterRoundBlack31/4 in bladeHoneywell
LM-HB4AS-H31Hour MeterRoundBlack4 (reset)1/4 in bladeHoneywell
LM-HC3CS-H11Hour MeterRectangle–33/16 in bladeHoneywell
LM-HC3CS-H21Hour MeterRectangle–33/16 in bladeHoneywell
LM-HC3CS-H22Hour MeterRectangle–33/16 in bladeHoneywell
LM-HD2AS-H11Hour MeterDiamondNone21/4 in bladeHoneywell
LM-HD2AS-N11Hour MeterDiamondNone21/4 in bladeNone
LM-HD2AS-N21Hour MeterDiamondNone21/4 in bladeNone
LM-HD2AS-N22Hour MeterDiamondNone21/4 in bladeNone
LM-HD3AS-H11Hour MeterDiamondNone31/4 in bladeHoneywell
LM-HD3AS-H13Hour MeterDiamondNone31/4 in bladeHoneywell
LM-HD3AS-N11Hour MeterDiamondNone31/4 in bladeNone
LM-HD4AS-H11Hour MeterDiamondNone4 (reset)1/4 in bladeHoneywell
LM-HD4AS-N11Hour MeterDiamondNone4 (reset)1/4 in bladeNone
LM-HH2AS-H11Hour MeterDiamondBlack21/4 in bladeHoneywell
LM-HH2AS-H21Hour MeterDiamondBlack21/4 in bladeHoneywell
LM-HH2AS-H22Hour MeterDiamondBlack21/4 in bladeHoneywell
LM-HH2AS-N11Hour MeterDiamondBlack31/4 in bladeNone
LM-HH3AS-H11Hour MeterDiamondBlack31/4 in bladeHoneywell
LM-HH3AS-H21Hour MeterDiamondBlack31/4 in bladeHoneywell
LM-HH3AS-H22Hour MeterDiamondBlack31/4 in bladeHoneywell
LM-HH3AS-N11Hour MeterDiamondBlack31/4 in bladeNone
LM-HH4AS-H11Hour MeterDiamondBlack4 (reset)1/4 in bladeHoneywell
LM-HH4AS-H21Hour MeterDiamondBlack4 (reset)1/4 in bladeHoneywell
LM-HH4AS-H22Hour MeterDiamondBlack4 (reset)1/4 in bladeHoneywell
LM-HH4AS-N11Hour MeterDiamondBlack4 (reset)1/4 in bladeNone
LM-HHFAS-H11Hour MeterDiamondBlack4 (backlight)1/4 in bladeHoneywell
LM-HHFAS-H21Hour MeterDiamondBlack4 (backlight)1/4 in bladeHoneywell
LM-HHFAS-H22Hour MeterDiamondBlack4 (backlight)1/4 in bladeHoneywell
Terminal
Type
Logo
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Microcontroller Unit (MCU) LCD Hour Meters/Counters
LM SERIES ORDER GUIDE, CONTINUED
Catalog ListingFunctionShapeBezelConnectors
LM-HS2AS-H11Hour MeterStandard–21/4 in bladeHoneywell
LM-HS2AS-H21Hour MeterStandard–21/4 in bladeHoneywell
LM-HS2AS-N21Hour MeterStandard–21/4 in bladeNone
LM-HS2AS-N22Hour MeterStandard–21/4 in bladeNone
LM-HS2AS-T11Hour MeterStandard–21/4 in bladeHours indicator
LM-HS3AS-H11Hour MeterStandard–31/4 in bladeHoneywell
LM-HS3AS-H21Hour MeterStandard–31/4 in bladeHoneywell
LM-HS3CS-N11Hour MeterStandard–33/16 in bladeNone
LM-HS4AS-H11Hour MeterStandard–4 (reset)1/4 in bladeHoneywell
LM-HSFAS-H11Hour MeterStandard–4 (backlight)1/4 in bladeHoneywell
LM-HW2AS-H31Hour MeterRoundChrome21/4 in bladeHoneywell
LM-HW3AS-H31Hour MeterRoundChrome31/4 in bladeHoneywell
LM-HW4AS-H31Hour MeterRoundChrome4 (reset)1/4 in bladeHoneywell
Terminal
Type
Logo
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LM Series
0.480 in
0.470 in
1.455 in
1.445 in
1.755 in
1.745 in
2X Ø 0.150 in ±0.005 in HOLES
0.18 in
LABEL PRINTING: PART NO, VOLTAGE, DATE CODE, UL RECOGNIZED SYMBOL WITH (FILE NO) XXXXXX & CE SYMBOL, MAX POWER,PRODUCING AREA SHOULD BE PRINTED ON LABEL.
#6-32 X .50 -REF ROUND HEADMACHINE SCREW CLASS 2 THREAD
#6 INTERNALSHAKEPROOF
TYPE 12
#6-32 NC2BTHREADS NUT
R 0.030 in ±0.005 typ.
MOUNTING HOLES
0.955 in
0.945 in
1.455 in
1.445 in
1.08 in
MOUNTING HOLE
4X R 0.030 in ±0.005 in
RETAINER
LABEL PRINTING:PART NO, VOLTAGE, DATE CODE, UL RECOGNIZEDSYMBOL WITH (FILE NO) XXXXXX & CE SYMBOL, MAX POWER, PRODUCING AREA SHOULD BE PRINTED ON LABEL.
0.94 in max.
CUP RETAINER & HEX NUT
DIMENSIONAL DRAWINGS
Figure 1. Diamond-Shaped Hour Meter Dimensions
LENS: BACKGROUND BLACK
WITH WHITE LETTERING
2.13 in
1.75 in
0.957 in
LOGO
0.08 in
0.79 in
0.75 in
0.14 in
0.22 in
±0.02 in
1.35 in
10°
1.25 in
(1.41 in)
(0.33 in)
2X Ø 0.15 in
(0.89 in)
Figure 2. Standard-Shaped Hour Meter Dimensions
1.60 in
(0.957 in)
(0.330 in)
Figure 3. Round-Shaped Hour Meter Dimensions
Ø 2.00 in
LOGO
Ø 2.27 in
0.10 in
0.12 in
0.30 in
BENDING TERMINAL
(OPTIONAL, CUSTOMER
DEFINE)
CASE
1.79 in
0.79 in
0.75 in
0.22 in
±0.02 in
1.33 in
0.98 in
0.73 in
TERMINAL
10°
BENDING TERMINAL
(OPTIONAL, CUSTOMER
DEFINE)
& LOCKWASHER
(0.18 in)
Ø 2.41 in
0.94 in max.
TERMINALS TO ACCEPT GM TERMINAL
2962447 AND GM CONNECTOR 2962448
OR EQUIVALENT.
1.44 in max.
0.88 in
(0.44 in)
TERMINALS TO ACCEPT GM TERMINAL 2962447
AND GM CONNECTOR 2962448 OR EQUIVALENT.
1.44 in max.
(0.18 in)
0.36 in
BEZEL
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DIAL
CASE
LABEL PRINTING: PART NO, VOLTAGE, DATE CODE,
UL RECOGNIZED SYMBOL WITH (FILE NO) XXXXXX
& CE SYMBOL, MAX POWER, PRODUCING AREA SHOULD
BE PRINTED ON LABEL.
0.88 in
TERMINALS TO ACCEPT GM TERMINAL 2962447
AND GM CONNECTOR 2962448 OR EQUIVALENT.
(0.44 in)
Page 9
Microcontroller Unit (MCU) LCD Hour Meters/Counters
0.957 in
BRACKET
(50067657-001)
NUT
(50067656-001)
LOCK WASHER
(50067695-001)
1.45 in
1.75 in
0.95 in
4X R 0.03
0.48 in
#6-32 X .50 -REF ROUND HEADMACHINE SCREW CLASS 2 THREAD
#6 INTERNAL
SHAKEPROOF
TYPE 12
#6-32 NC2B
THREADS NUT
OPTIONAL DELUXE BEZEL(GASKET FLANGE)
2 X Ø 0.150 in holes
MOUNTING HOLES
LABEL PRINTING:PART NO, VOLTAGE, DATE CODE, UL RECOGNIZED
SYMBOL WITH (FILE NO) XXXXXX & CE SYMBOL, MAX POWER,PRODUCING AREA SHOULD BE PRINTED ON LABEL.
Figure 4. Rectangle-Shaped Hour Meter Dimensions
1.902 in
0.157 in
1.291 in
0.72 in
Figure 5. Diamond-Shaped (No Bezel) Hour Meter Dimensions
BACKGROUND BLACK WITH WHITE LETTERING
2.05 in
1.03 in
1.75 in
(0.957 in)
(0.330 in)
2 X Ø 0.150 in holes
0.10 in
1.35 in
0.79 in
0.75 in
0.22 in
±0.02 in
CASE - BLACK
0.87 in
10°
TERMINAL
BENDING TERMINAL
(OPTIONAL, CUSTOMER
DEFINE)
0.94 in max.
1.768 in
1.44 in max.
(0.88 in)
(0.44 in)
0.18 in
TERMINALS TO ACCEPT GM TERMINAL 2962447
AND GM CONNECTOR 2962448 OR EQUIVALENT.
, CAUTION
Be cautious when working around and connecting to the LM
Series’ terminals, especially those other than the positive
terminal (+) as there is no eletrical protection on the negative (-),
reset, enable, and/or backlight terminals.
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LM Series
Figure 6. LM Series Mounting and Fasteners (if applicable)
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Microcontroller Unit (MCU) LCD Hour Meters/Counters
ADDITIONAL INFORMATION
The following associated literature is available on the Honeywell web
site at sensing.honeywell.com:
• Product installation instructions
• Product range guide
• Product line guide
• Product application-specific information
– Case study: True time stamp hour meters
– Industrial product line card
– Application note: Sensors and switches for potential medical
applications
– Application note: Sensors and switches in front loaders
– Application note: Sensors and switches in mobile cranes
– Appilcation note: Sensors and switches in oxygen concentrator
applications
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.
WARNING
MISUSE OF DOCUMENTATION
• The information presented in this product sheet 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.
WARRANTY/REMEDY
Honeywell warrants goods of its manufacture as being free of
defective materials and faulty workmanship. Honeywell’s standard
product warranty applies unless agreed to otherwise by Honeywell
in writing; please refer to your order acknowledgement or consult
your local sales office for specific warranty details. If warranted
goods are returned to Honeywell during the period of coverage,
Honeywell will repair or replace, at its option, without charge those
items it finds defective. The foregoing is buyer’s sole remedy
and is in lieu of all other warranties, expressed or implied,
including those of merchantability and fitness for a particular purpose. In no event shall Honeywell be liable for consequential, special, or indirect damages.
While we provide application assistance personally, through our
literature and the Honeywell website, it is up to the customer to
determine the suitability of the product in the application.
Specifications may change without notice. The information we
supply is believed to be accurate and reliable as of this printing.
However, we assume no responsibility for its use.
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Find out more
Honeywell serves its customers
through a worldwide network
of sales offices, representatives
and distributors. For application
assistance, current specifications,
pricing or name of the nearest
Authorized Distributor, contact
your local sales office.