Amphenol
Amphenol
LMD and LMS Modular Connectors
TABLE OF CONTENTS
Amphenol LMD & LMS Modular Connectors
• Table of Contents. .. . .. . .. . .. . .. . .. . .. . .. . .. . .. .99
• Introduction - Features, Benefits, Performance ..100
• Features, Options & Contact Data .. . .. . .. . .. . ..101
• LMD Housings - How to Order .. . .. . .. . .. . .. . ..102
• LMD Module Contact Arrangements. .. . .. .103, 104
• LMD Bussing Modules . .. . .. . .. . .. . .. . .. . .. . ..105
.
• LMD Diode Modules & Relay Modules . .. . .. . ..106
• LMD Accessories. .. . .. . .. . .. . .. . .. . .. . .. . .. . ..107
• LMD Assembly Instructions .. . .. . .. . .. . .. .108, 109
• LMS In-Line Splice Connector. .. . .. . .. . .. . .. . ..110
LMD & LMS Markets:
LRM Typical Typical Markets:
• Commerical Avionics
•
Military & Commercial Aviation
• Avionics Instrumention
•
Military Vehicles
•
Missiles/Ordnance
•
C4ISR
•
Space
•
Radar
Amphenol
Aerospace
99
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Amphenol
Aerospace
Introduction/
Pkg. Solutions/
Brush Contact
Amphenol
®
LMD and LMS Modular Connectors
for Rack & Panel or Cable Attachment
INTRODUCTION: FEATURES, BENEFITS, PERFORMANCE
LMD Modular Connectors
The LMD Connector Series was designed by Amphe-
nol Pyle-National to provide flexibility in the assembly
of wire harnesses that are used in instrumentation and
avionic control environments. The modular design of
the LMD provides rack and panel or cable to cable
attachment.
Options/ Hybrids - Fiber Optics/ Staggered/
Accessories Hi Speed/RF/Power
GEN-X
LRM (Line Replaceable Modules)
Docking Conn./ Hybrids - Signal/Power/ Standard
Accessories/Install.
Coax/Fiber Optics
Brush
Low Mating Force MIL-DTL-55302
• An LMD Connector is comprised of a housing,
modules and contacts - each ordered separately,
requiring assembly
• Lightweight housings are offered in two materials
• standard black thermoplastic
• high performance composite material for EMI
shielding
• white thermoplastic nylon material with increased
solvent resistance
• Four standard modules are available with the
following contact arrangements: 1 #8, 4 #16, 9 #20,
16 #22
• Modules are available in sealed and unsealed
versions
• Linear module design may be used for rack and
panel or cable to cable applications
• Bussing modules available to allow for a plurality of
circuit network configurations without extra
hardware
• Diode modules provide a current protection system
for avionic instrumentation packages and eliminate
the need for dedicated PC boards and other
hardware
• Miniature relay modules can be added which
eliminate the need for printed circuit boards and
hardware
Design Features of LMD Connectors
LMD Receptacle and Plug
HSB
3
HDB
3
Hi Speed
High Density
•
•
•
•
•
•
LMD Benefits
Reduces assembly and production costs
Eliminates costly PC board and associated hardware
Reduces inventory levels and associated costs
Allows for a variety of circuit configurations
Permits ease of circuit upgrading
Facilitates equipment maintenance
Ruggedized
VME64x /
VITA 60, 66
LMD Performance Characteristics
Temperature Rating
–55° C to +140° C (-67 ° F to + 284° F)
5000 megohms initial: 1000 megohms after 96
hours humidity
250 cycles (mating and unmating)
Maximum discontinuity of one microsecond
when subjected to sinusoidal vibration of 10 to
2000 Hz at 15 gravity units
Maximum discontinuity of one microsecond
when subjected to 1/2 -sine-wave transient
shock of 50 gravity units with pulse duration of
11 milliseconds
5 lbs. maximum
70 lbs. minimum
Insulation Resistance
(min.)
Durability
Vibration
Physical Shock
Module Insertion &
Removal Force
Module Retention
Rack & Panel
Brush
Ruggedized
Other
Rectangular
Interconnects
LMD/LMS
Rectangular
Interconnects
LMS Modular Connectors
Supplementing the LMD connector family, Amphenol/Pyle
National offers the LMS in-line splice connector; a low cost
interconnects that incorporates the LMD modules and contacts.
• Standard LMS splice connector - 3-piece assembly with
module removal tool access
• Tool-less splice connector - 3-piece assembly with a
push-button module release for easy module removal
• Two-piece bracket available for panel mounting
• Used in wire harness, instrument and equipment
terminations and test points
LMS Tool-less Splice Connector
100
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LMD Modular Connectors
FEATURES, OPTIONS & CONTACT DATA
LMD Plug
Optional
Center
Jackscrew
Amphenol
Aerospace
Introduction/
Pkg. Solutions/
Brush Contact
LMD Receptacle
Optional Keying
Post (Six position
keying capability)
Staggered/ Hybrids - Fiber Optics/ Options/
GEN-X
Hi Speed/RF/Power Accessories
Strain Reliefs
LRM (Line Replaceable Modules)
Pin or Socket Modules
(may be intermixed in plug
or receptacle housings
Variety of Contacts
available. (accept #8
through #28 AWG wire)
Module
Sealed or unsealed, accept rear release #8, #16, #20
and #22 gauge contacts (See pages 103-105 for the
variety of module types available)
Ruggedized
VME 64x/
VITA 60, 66
HDB
3
High Density
LMD’s module options provide a mix of both active and
passive devices within one connector. The features and
options of this series describe the design flexibility in this
connector series:
• LMD Standard components are molded of a U/L rated
94VO flame retardant, light-weight thermoplastic material.
Alternate white nylon material (provides resistance to
industrial oils and solvents) is available; consult Amphenol
Aerospace for availability.
• The linear LMD connector may be used for rack and panel
or cable-to-cable applications.
• Plug and receptacle housings may be front or rear panel
mounted.
• Optional keying post provides six position keying
capability.
• The optional center jackscrew provides ease of mating
and unmating and insures high reliability under vibration.
• Cable strain reliefs are available for internal attachment.
(See page 107).
• Variety of module types. Sealed and unsealed modules
accept rear release #8, #16, #20 and #22 gauge contacts.
Bussing, diode and relay modules available. PC tail
contacts are also available; consult Amphenol Aerospace.
• A variety of contacts accept #8 through #28 AWG wire.
Commercially available automated crimp terminating
equipment may be used.
• Wired or unwired modules are rear inserted and held by
two retention tines. With the aid of a front release tool, the
modules are easily removed from the rear. (See pg. 107).
• Pin or socket modules may be intermixed in plug or
receptacle housings.
LMD Features and Options
Contact Data
Contact Resistance
Max.
Dielectric
Withstand- Recommended
Contact Wire
ing Voltage Working Voltage
Size
Size Test Current Max.
(amperes) Millivolts AC (RMS)
AC (RMS)
22
20
16
8*
8
22
28
20
24
16
20
12
14
8
10
5.0
1.5
7.5
3.0
13.0
7.5
23
17
46
33
73
54
55
45
49
46
42
40
26
28
1800
1800
2300
2300
2300
600
600
900
900
900
HSB
3
Hi Speed
Standard Hybrids - Signal/Power/ Docking Conn./
Brush
Coax/Fiber Optics
Accessories/Install.
Low Mating Force MIL-DTL-55302
Contact Wire
Size
Size
28
26
24
22
24
22
20
20
18
16
14
12
10
8
Contact Crimp
Tensile Strength
Lbs. Min.
3
5
8
12
8
12
20
20
30
50
70
110
150
220
Max.
Wire Insulation
Rack & Panel
Brush
Ruggedized
22
.054
20
.083
LMD/LMS
Rectangular
Interconnects
16
8*
8
.103
.255
.255
Other
Rectangular
Interconnects
* with #12 wire well
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101
Amphenol
Aerospace
Introduction/
Pkg. Solutions/
Brush Contact
LMD Modular Connectors
LMD HOUSINGS - HOW TO ORDER
HOW TO ORDER LMD HOUSINGS
Housings are ordered separately from modules and contacts. Housings
are available with 6 bays. Typical housing part number is shown as follows:
1.
Options/ Hybrids - Fiber Optics/ Staggered/
Accessories Hi Speed/RF/Power
GEN-X
LRM (Line Replaceable Modules)
1.
Connector Type
LMD
2.
Housing Material
0
F
LMD
2.
Housing
Material
-0
3.
Number
of Modules
6
4.
Connector
Type
P
5.
Coupling
Mechanism
J
6.
Alternate
Keying
3
designates standard black thermoplastic
designates white thermoplastic nylon material -
consult Amphenol for availability
RECEPTACLE HOUSING
6 BAY
.740
(18.80)
A
B
C
4
3.
Number of Modules
6
cavities in plug or receptacle
housing (available in 6 only)
5.045
(128.14)
4.695
(119.25)
5
6
D
E
F
1
2
3
Ruggedized
VME64x /
VITA 60, 66
4.
Connector Type
P
R
designates plug
designates receptacle
4.320
(109.73)
.175
(4.45)
REF.
MOUNTING HOLE
FOR #8 SCREW TYPICAL
KEY POSITION INDICATOR
(6 KEY POSITIONS)
#12-24 THREAD
1.100
(27.94)
#10-32 NUT
FOR CHANGING
KEY POSITION
.944
(23.98)
HSB
3
HDB
3
Hi Speed
High Density
5.
Coupling Mechanism
J
K
E
designates jack-socket, rotating
designates jack-screw, fixed
designates without coupling mechanism
JACK SCREW
KEYING MECHANISM
6.
Alternate Keying
3
7
8
6 positions of keying post: 1, 2, 3, 4, 5 or 6
designates keying hardware shipped unassembled
for field assembly
designates no alternate keying hardware. Keyed
through housing only.
Docking Conn./ Hybrids - Signal/Power/ Standard
Accessories/Install.
Coax/Fiber Optics
Brush
Low Mating Force MIL-DTL-55302
Ordering information on modules, contacts and
strain reliefs is given on other pages of this LMD
catalog section that follow.
PLUG HOUSING
6 BAY
.740
(18.80)
F
E
5.045
(128.14)
4.695
(119.25)
D
3
4
2
C
1
6
B
A
5
4.320
(109.73)
.175
(4.45)
REF.
MOUNTING HOLE
FOR #8 SCREW TYPICAL
KEY POSITION INDICATOR
(6 KEY POSITIONS)
#12-24 THREAD
Rack & Panel
Brush
Ruggedized
1.000
(25.40)
.844
(21.44)
JACK SOCKET
KEYING MECHANISM
.375
(9.53)
HEX
Other
Rectangular
Interconnects
LMD/LMS
Rectangular
Interconnects
102
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LMD Modular Connectors
MODULE CONTACT ARRANGEMENTS
Modules and contacts for LMD connectors are sold separately
from housings.
Amphenol
Aerospace
Introduction/
Pkg. Solutions/
Brush Contact
Modules with 16 Size 22 Contacts
POLARIZING
KEYWAY
4
3
7
11
15
2
6
10
14
1
5
9
13
1
2
6
10
14
3
7
11
15
4
8
12
16
4
3
7
11
15
2
6
10
14
Pin Contact Size 22
Part number: LMD-4022-36LJ
.830 MAX.
(21.06) MAX.
Staggered/ Hybrids - Fiber Optics/ Options/
GEN-X
Hi Speed/RF/Power Accessories
LRM (Line Replaceable Modules)
POLARIZING
KEYWAY
1
5
9
13
1
2
6
10
14
3
7
11
15
4
8
12
16
5
9
13
.047
(1.19)
.450
(11.43)
.061
(1.55)
GREEN INK
STRIPE
.589
(14.96)
.174
(4.42)
.450
(11.43)
8
12
16
.500
(12.70)
.450
(11.43)
.450
(11.43)
8
12
16
.500
(12.70)
5
9
13
.450
(11.43)
.450
(11.43)
LOCATING SHOULDER
.450
(11.43)
.450
(11.43)
INTERFACIAL
LOCATING
SEAL
SHOULDER
.030
(0.76)
.995
(25.27)
.573
(14.55)
.648
(16.46)
1.117
(28.37)
Socket Contact Size 22
Part number: LMD-4122-96LD
.563
(14.30)
.865
(21.97)
.047
(1.19)
.863 MAX.
(21.92) MAX.
.621
(15.77)
Ruggedized
VME 64x/
VITA 60, 66
RETENTION
TINE
.132
(3.35)
WIRE
SEAL
RETENTION
TINE
.132
(3.35)
GREEN INK
STRIPE
.061
(1.55)
Socket
Module
Part number:
LMD-3003-S
Pin
Module
Part number:
LMD-3003-P
Sealed Socket
Module
Part number:
LMD-4003-S
Sealed Pin
Module
Part number:
LMD-4003-P
Contact Finish: Gold Plated
HDB
3
High Density
HSB
3
Hi Speed
Modules with 9 Size 20 Contacts
POLARIZING
KEYWAY
3
2
5
8
1
4
7
1
2
5
8
3
6
9
3
2
5
8
1
4
7
Pin Contact Size 20
Part number: LMD-4020-96LD
POLARIZING
KEYWAY
1
2
5
8
3
6
9
Standard Hybrids - Signal/Power/ Docking Conn./
Brush
Coax/Fiber Optics
Accessories/Install.
Thermocouple
Part Number: LMD-4020-10( )*
4
7
Low Mating Force MIL-DTL-55302
.450
(11.43)
6
9
.500
(12.70)
4
7
.450
(11.43)
.450
(11.43)
6
9
.500
(12.70)
.450
(11.43)
.720 MAX.
(18.29) MAX.
.077
(1.96)
.546
(13.87)
.031
(0.79)
.450
(11.43)
.450
(11.43)
LOCATING SHOULDER
.450
(11.43)
.450
(11.43)
INTERFACIAL
LOCATING
SEAL
SHOULDER
.1015
(2.58)
RED INK
STRIPE
.040
(1.02)
.995
(25.27)
.573
(14.55)
.648
(16.46)
1.117
(28.37)
.563
(14.30)
.865
(21.97)
Socket Contact Size 20
Part number: LMD-4120-96LD
Thermocouple
Part Number: LMD-4120-10( )*
.077
(1.96)
.656 MAX.
(16.56) MAX.
.482
(12.24)
.031
(0.79)
RETENTION
TINE
.132
(3.35)
WIRE
SEAL
RETENTION
TINE
.132
(3.35)
Rack & Panel
Brush
Ruggedized
Socket
Module
Part number:
LMD-3001-S
Pin
Module
Part number:
LMD-3001-P
Sealed Socket
Module
Part number:
LMD-4001-S
Sealed Pin
Module
Part number:
LMD-4001-P
.1015
(2.58)
RED INK
STRIPE
.077
(1.96)
LMD/LMS
Rectangular
Interconnects
Module part numbers are for black thermoplastic material. Consult Amphenol
Aerospace for availability of any other module materials.
Contact Finish: Gold Plated
*Complete thermocouple part number with
code letter for desired contact material as
follows:
P = Chromel
R = Alumel
N = Constantan
C = Copper
Other
Rectangular
Interconnects
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103
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