Black Box LMC280A Instructions for use

24/7 TECHNICAL SUPPORT AT 1.877.877.2269 OR VISIT BLACKBOX.COM
INDUSTRIAL
MEDIA
CONVERTERS
LMC280A, LMC281A, LMC282A, LGC280A, LGC281A, LGC282A
QUICK INSTALL GUIDE/USER MANUAL
1 2 3 4
ON
Half Duplex
ETH
10/100M
1
RX
LFP
10M
1
2
TX
LNK/
ACT
DPX
P1 P2 LFP
DPX
1 2 3 4
ON
Half Duplex
ETH
10/100M
1
RX
LFP
10M
1
2
TX
LNK/
ACT
DPX
P1 P2 LFP
DPX
1 2 3 4
ON
Half Duplex
ETH
10/100M
1
LFP
10M
1
2
LNK/
ACT
DPX
P1 P2 LFP
DPX

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TABLE OF CONTENTS
QUICK INSTALLATION GUIDE.......................................................................................................................................................... 4
Step 1: Check the Package Contents............................................................................................................................................................4
Step 2: DIN Rail Mounting..............................................................................................................................................................................4
Step 3: Wallmounting .....................................................................................................................................................................................4
Step 4: Network Connection..........................................................................................................................................................................5
Step 5: DIP Switch Settings...........................................................................................................................................................................5
Step 6: Terminal Block Wiring .......................................................................................................................................................................5
1. SPECIFICATIONS........................................................................................................................................................................... 6
1.1 LMC280A, LMC281A, LMC282A.............................................................................................................................................................6
1.2 LGC280A, LGC281A, LGC282A ...............................................................................................................................................................8
1.3 Compatible Fiber SFP Modules for Use with LMC280A, LGC280A...................................................................................................10
2. OVERVIEW.................................................................................................................................................................................... 11
2.1 Introduction............................................................................................................................................................................................. 11
2.2 Features ..................................................................................................................................................................................................11
2.3 Available Models .................................................................................................................................................................................... 11
2.4 What’s Included......................................................................................................................................................................................12
2.5 Hardware Description............................................................................................................................................................................12
2.5.1 LMC280A, LMC281A, LMC282A ..................................................................................................................................................................12
2.5.2 LGC280A, LGC281A, LGC282A.....................................................................................................................................................................14
3. CONFIGURATION ........................................................................................................................................................................ 17
3.1 Power Connection Guide (LMC280A, LMC281A, LMC282A).............................................................................................................17
3.2 Power Connection Guide (LGC280A, LGC281A, LGC282A) ...............................................................................................................17
3.3 10/100BASE-TX or 1000BASE-T Ethernet Port Connections.............................................................................................................18
3.3.1 10/100BASE-TX Ethernet Port Connections ..............................................................................................................................................18
3.3.2 1000BASE-T Ethernet Port Connections ....................................................................................................................................................18
3.3.3 RJ-45 (8-pin) to RJ-45 (8-pin) Straight-through Cable Wiring................................................................................................................19
3.3.4 RJ-45 (8-pin) to RJ-45 (8-pin) Crossover Cable Wiring ..........................................................................................................................19
3.4 100BASE-FX or 1000BASE-SX/LX Ethernet Port Connections .........................................................................................................20
3.4.1 SC Port to SC Port Cable Wiring ...................................................................................................................................................................20
3.4.2 ST Port to ST Port Cable Wiring ...................................................................................................................................................................20
3.4.3 LC Port to LC Port Cable Wiring....................................................................................................................................................................20
3.5 Setting the DIP Switches .......................................................................................................................................................................21
3.5.1 Link Fault Protection (LFP) DIP Switch on LMC280A, LMC281A, and LMC282A..............................................................................21
3.5.2 Relay Function DIP Switch on LGC280A, LGC281A, LGC282A..............................................................................................................21
4. INSTALLATION ............................................................................................................................................................................ 22
4.1 DIN Rail Mounting..................................................................................................................................................................................22
4.2 Wallmounting..........................................................................................................................................................................................22
4.3 Network Connection..............................................................................................................................................................................22
4.4 Terminal Block Wiring............................................................................................................................................................................22

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TABLE OF CONTENTS
5. APPLICATION DIAGRAMS.......................................................................................................................................................... 23
5.1 LMC280A, LMC281A, LMC282A Link Fault Passthrough Application..............................................................................................23
5.2 LGC280A, LGC281A, LGC282A Point-to-Point Application................................................................................................................24
6. DIMENSIONAL DIAGRAMS......................................................................................................................................................... 25
6.1 LMC280A, LMC281A, LMC282A...........................................................................................................................................................25
6.2 LGC280A, LGC281A, LGC282A.............................................................................................................................................................26
APPENDIX A: REGULATORY INFORMATION ................................................................................................................................ 27
A.1 FCC Statement .......................................................................................................................................................................................27
A.2 CE ............................................................................................................................................................................................................27
A.3 RoHS/WEEE ...........................................................................................................................................................................................27
A.4 NOM Statement .....................................................................................................................................................................................28
APPENDIX B: DISCLAIMER/TRADEMARKS ................................................................................................................................. 29
B.1 Disclaimer ...............................................................................................................................................................................................29
B.2 Trademarks Used in this Manual ..........................................................................................................................................................29

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QUICK INSTALLATION GUIDE
STEP 1: CHECK THE PACKAGE CONTENTS
Before installation, make sure you have all of the package contents available.
Package Contents
(1) Fast Ethernet or Gigabit Industrial Media Converter unit
(1) Wallmounting kit (2 brackets, 8 screws)
(1) DIN Rail kit (installed)
(1) 4-position terminal block (LMC280A, LMC281A, LMC282A models only)
(1) 6-posiiton terminal block (LGC280A, LGC281A, LGC282A models only)
(1) Dust cover
You Will Also Need
(1) Power supply
(1) Fiber SFP module (required for LMC280A and LGC280A models only)
STEP 2: DIN RAIL MOUNTING
NOTE: The DIN rail kit is already installed on the media converter.
STEP 3: WALLMOUNTING
1. Screw the two pieces of the wallmount kit onto both sides of the media converter. A total of eight screws are required, as shown
below.
+
+
+
FIGURE Q-1. ATTACHING THE WALLMOUNT BRACKETS
2. Use the media converter, with wallmount plates attached, as a guide to mark the correct locations of the four screws.
3. Insert four screw heads through the large parts of the keyhole-shaped apertures, and then slide the media converter downwards.
Tighten the four screws for added stability.

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STEP 4: NETWORK CONNECTION
The device has a standard Ethernet port. According to the link type, the device uses CAT3, 4, 5, 5e UTP cables to connect to any
other network devices (PCs, servers, switches, routers, or hubs).
STEP 5: DIP SWITCH SETTINGS
Set the DIP switches as described in the tables shown next.
LFP (LINK FAULT PROTECTION) DIP SWITCH ON THE LMC280A, LMC281A, LMC282A
TABLE Q-1. LFP DIP SWITCH
NUMBER POSITION DESCRIPTION
1ON LFP mode enable
OFF LFP mode disable
2ON 10-Mbps Ethernet speed
OFF 10/100 Mbps autonegotiating Ethernet speed
3ON Half-duplex Ethernet
OFF Half-duplex/full duplex autonegotiating Ehernet
4ON Half-duplex fiber
OFF Full duplex fiber
RELAY FUNCTION DIP SWITCH ON THE LGC280A, LGC281A, LGC282A
TABLE Q-2. RELAY FUNCTION DIP SWITCH
NUMBER POSITION DESCRIPTION
1, 2 OFF Relay function disable
1ON PWR-1 failure, relay enable
2ON PWR-2 failure, relay enable
1, 2 ON PWR-1 or PWR-2 failure, relay enable
STEP 6: TERMINAL BLOCK WIRING
The media converter supports dual redundant power supplies (not included) connected via the 4- or 6-pin terminal block.
NOTE: To order a suitable power supply, contact Black Box Technical Support at 877-877-2269 or [e-mail]
STEP 5A: Insert the negative/positive wires into the V-/V+ terminals, respectively.
STEP 5B: To keep the DC wires from pulling loose, use a small flat-blade screwdriver to tighten the wire-clamp screws
on the front of the terminal block connector.

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CHAPTER 1: SPECIFICATIONS
1.1 LMC280A, LMC281A, LMC282A
See the table below.
TABLE 1-1. LMC280A, LMC281A, LMC282A SPECIFICATIONS
PHYSICAL PORTS
CONNECTORS (1) 10/100BASE-TX RJ-45 Auto MDI/MDIX port;
LMC280A: (1) SFP cage;
LMC281A: (1) Multimode SC port;
LMC282A: (1) Single-mode SC port
FIBER PORT SPECIFICATIONS (LMC280A) LMC280A: Depends on SFP installed;
LMC281A, LMC282A: See below
FIBER PORTS SPECIFICATIONS (LMC281A, LMC282A)
STANDARD 100BASE-FX
MODE LMC281A: Multimode;
LMC282A: Single-mode
FIBER DIAMETER LMC281A: 62.5/125 µm,
50/125 µm;
LMC282A: 9/124 µm
TYPICAL DISTANCE LMC281A: 2 km;
LMC282A: 30 km
WAVELENGTH LMC281A, LMC282A: 1310 nm
MAXIMUM OUTPUT OPTICAL POWER LMC281A: -14 dBm;
LMC282A: -8 dBm
MINIMUM OUTPUT OPTICAL POWER LMC281A: -23.5 dBm;
LMC282A: -15 dBm
MAXIMUM INPUT OPTICAL POWER (SATURATION) LMC281A, LMC282A: 0 dBm
MINIMUM INPUT OPTICAL POWER (SENSITIVITY) LMC281A: -31 dBm;
LMC282A: -34 dBm
LINK BUDGET LMC281A: 7.5 dB;
LMC282A: 19 dB
TECHNOLOGY
ETHERNET STANDARDS IEEE 802.3 for 10BASE-T
IEEE 802.3u for 100BASE-TX and 100BASE-FX
IEEE 802.3x for Flow control
PROCESSING Store-and-Forward
DIP SWITCH SETTING DIP-Switch 1 for LFP mode selection:
ON: enable;
OFF: disable;
DIP-Switch 2 for Ethernet speed selection:
ON: 10 Mbps;
OFF: 10/100 Mbps Auto-negotiate;
DIP-Switch 3 for Ethernet full/half duplex selection:
ON: Half-duplex;
OFF: Full/Half-Duplex Auto-negotiate;
DIP-Switch 4 for fiber full/half duplex selection:
ON: Half-Duplex;
OFF: Full-Duplex

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CHAPTER 1: SPECIFICATIONS
TABLE 1-1 (CONTINUED). LMC280A, LMC281A, LMC282A SPECIFICATIONS
LED INDICATORS
POWER LED (2) Power LEDs (Green)
10/100BASE-TX RJ-45 PORT LED Green for port Link/Act:
ON: Link up;
Blinking: Acting;
OFF: Link down;
Amber for 100 Mbps/10 Mbps indicator:
ON: Link at 100 Mbps;
OFF: Link at 10 Mbps
Green for port duplex indicator:
ON: Full-Duplex;
OFF: Half-Duplex
100BASE-FX FIBER PORT LED Green for fiber port Link/Act:
ON: Link up;
Flash: Acting;
OFF: Link down;
Green for fiber port duplex indicator:
ON: Full-Duplex;
OFF: Half-Duplex
LFP STATUS LED Amber LED:
ON: LFP function fail;
OFF: LFP function disable
POWER
INPUT POWER Dual 12–48 VDC power input at 4-pin terminal block
POWER CONSUMPTION (TYP.) 2.2 Watts
OVERLOAD CURRENT PROTECTION Present
REVERSE POLARITY PROTECTION Present on terminal block
PHYSICAL CHARACTERISTICS
ENCLOSURE IP-30
DIMENSIONS 3.74" H x 1.03" W x 2.76" D (9.5 x 2.6 x 7.0 cm)
WEIGHT LMC280A: 0.47 lb. (213 g);
LMC281A, LMC282A: 0.48 lb. (218 g)
ENVIRONMENTAL
STORAGE TEMPERATURE -40 to +185 F (-40 to +85°C)
OPERATING TEMPERATURE -40 to +158°F (-40 to +70° C)
OPERATING HUMIDITY 5 to 95%, noncondensing
REGULATORY APPROVALS
EMI FCC Part 15, CISPR (EN55022) class A
EMS EN61000-4-2 (ESD), EN61000-4-3 (RS), EN61000-4-4 (EFT), EN61000-4-5 (SURGE), EN61000-4-6 (CS),
EN61000-4-8,
EN61000-4-11
SHOCK IEC60068-2-27
FREE FALL IEC60068-2-32
VIBRATION IEC60068-2-6
SAFETY EN60950-1

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CHAPTER 1: SPECIFICATIONS
1.2 LGC280A, LGC281A, LGC282A
See the table below.
TABLE 1-2. LGC280A, LGC281A, LGC282A SPECIFICATIONS
PHYSICAL PORTS
CONNECTORS (1) 10/100/1000BASE-TX RJ-45 Auto MDI/MDIX port;
LGC280A: (1) SFP cage;
LGC281A: (1) Multimode SC port;
LGC282A: (1) Single-mode SC port
FIBER PORT SPECIFICATIONS (LGC280A) LGC280A: Depends on SFP installed;
LGC281A, LGC282A: See below
FIBER PORTS SPECIFICATIONS (LGC281A, LGC282A)
STANDARD LGC281A: 1000BASE-SX;
LGC282A: 1000BASE-LX
MODE LGC281A: Multimode;
LGC282A: Singe-mode
FIBER DIAMETER LGC281A: 62.5/125 µm,
50/125 µm;
LGC282A: 9/125 µm
TYPICAL DISTANCE LGC281A: 550 m;
LGC282A: 10 km
WAVELENGTH LGC281A: 850 nm;
LGC282A: 1310 nm
MAXIMUM OUTPUT OPTICAL POWER LGC281A: -4 dBm;
LGC282A: -3 dBm
MINIMUM OUTPUT OPTICAL POWER LGC281A, LGC282A: -9.5 dBm
MAXIMUM INPUT OPTICAL POWER (SATURATION) LGC281A: 0 dBm;
LGC282A: -3 dBm
MINIMUM INPUT OPTICAL POWER (SENSITIVITY) LGC281A: -18 dBm;
LGC282A: -20 dBm
LINK BUDGET LGC281A: 8.5 dB;
LGC282A: 10.5 dB
TECHNOLOGY
ETHERNET STANDARDS IEEE 802.3 for 10BASE-T
IEEE 802.3u for 100BASE-TX
IEEE 802.3ab for 1000BASE-T
IEEE 802.3z for 1000BASE-X
JUMBO FRAME 10240 bytes
LED INDICATORS
POWER LED (2) Power LEDs (Green)
FAULT LED Amber: Indicates power failure
10/100/1000BASE-TX RJ-45 PORT LED Green for port Link/Act;
Amber for 100 Mbps indicator
1000BASE-FX FIBER PORT LED Green for port Link/Act
FAULT CONTACT
RELAY Relay output to carry capacity of 1A at 24 VDC
DIP SWITCH Relay output function enable/disable by DIP switch

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CHAPTER 1: SPECIFICATIONS
TABLE 1-2 (CONTINUED). LGC280A, LGC281A, LGC282A SPECIFICATIONS
POWER
INPUT POWER Dual 12–48 VDC power input at 4-pin terminal block
POWER CONSUMPTION (TYP.) 3.5 Watts
OVERLOAD CURRENT PROTECTION Present
REVERSE POLARITY PROTECTION Present
PHYSICAL CHARACTERISTICS
ENCLOSURE IP-30
DIMENSIONS 5.68" H x 1.03" W x 3.74" D (14.4 x 2.6 x 9.4 cm)
WEIGHT LGC280A: 0.83 lb. (380 g):
LGC281A, LGC282A: 0.88 lb. (400 g)
ENVIRONMENTAL
STORAGE TEMPERATURE -40 to +185 F (-40 to +85°C)
OPERATING TEMPERATURE -40 to +158°F (-40 to +70° C)
OPERATING HUMIDITY 5 to 95%, noncondensing
REGULATORY APPROVALS
EMI FCC Part 15, CISPR (EN55022) class A
EMS EN61000-4-2 (ESD), EN61000-4-3 (RS), EN61000-4-4 (EFT), EN61000-4-5 (Surge), EN61000-4-6 (CS),
EN61000-4-8,
EN61000-4-11
SHOCK IEC60068-2-27
FREE FALL IEC60068-2-32
VIBRATION IEC60068-2-6
SAFETY EN60950-1
MTBF LGC280A: 650,069 hours;
LGC281A: 597,923 hours;
LGC282A: 611,417 hours

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CHAPTER 1: SPECIFICATIONS
1.3 COMPATIBLE FIBER SFP MODULES FOR USE WITH LMC280A, LGC280A
See the table below.
TABLE 1-3. COMPATIBLE FIBER SFP MODULES FOR USE WITH LMC280A, LGC280A
PART NUMBER DESCRIPTION DISTANCE
100-MBPS CONNECTIONS (FOR USE WITH LMC280A)
LFP401 SFP/155 Extended Diagnostics, 850-nm, Multimode, LC 2 km
LFP402 SFP/155 Extended Diagnostics, 1310-nm, Multimode, LC 2 km
LFP403 SFP/155 Extended Diagnostics, 1310-nm, Single-mode, LC 30 km
LFP404 SFP/155 Extended Diagnostics, 1310-nm, Single-mode, LC 60 km
1-GBPS CONNECTIONS (FOR USE WITH LGC280A)
LFP411 SFP 1250-Mbps, 850-nm Multimode Fiber, LC 550 m
LFP412 SFP 1250-Mbps, 1310-nm Multimode Fiber, LC 2 km
LFP413 SFP 1250-Mbps, 1310-nm Single-mode Fiber, LC 10 km
LFP414 SFP 1250-Mbps, 1310-nm Single-mode Fiber, LC 40 km
LFP418 SFP 1250, Extended Diagnostics, 1550-nm Single-mode Fiber, LC 80 km
LFP420 SFP 1250-Mbps, 1550-nm TX, 1310-nm RX, Single-Mode Fiber, Simplex LC 10 km
LFP421 SFP 1250-Mbps, 1310-nm TX, 1550-nm RX, Single-Mode Fiber, Simplex LC 10 km
NOTE: Black Box media converters will also support generic SFP modules.

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CHAPTER 2: OVERVIEW
2.1 INTRODUCTION
The Fast Ethernet Industrial Media Converters convert a 10/100BASE-T(X) interface to a 100BASE-FX interface to allow you to extend
communication distance using optical fiber. The Gigabit Ethernet Industrial Media Converters convert a 10/100/1000BASE-T(X)
interface to a 1000BASE-FX interface.
Both the Fast Etherent and Gigabit Ethernet Media Converters are encased in a rigid IP-30 housing and have a wide operating
temperature range from -40 to 158° F (-40 to 70° C) for use in harsh industrial environments. The converters have dual power inputs,
each accepting a wide voltage range from 12 to 48 VDC.
The Fast Ethernet models also support the LFP (Link Fault Pass-through) feature. When one side of the link fails, the other side
continues transmitting packets. Use the DIP switch to enable the LFP function.
The Gigabit Ethernet models support the Relay Output Enable/Disable function via a DIP switch.
2.2 FEATURES
Fast Ethernet models support one 10/100BASE-T(X) auto-negotiation and auto-MDI/MDI-X port
Gigabit models support one 10/100/1000BASE-T(X) auto-negotiation and auto-MDI/MDI-X port
Fast Ethernet models provide one 100BASE-X multimode/single-mode or SFP port
Gigabit models provide one 1000BASE-X multimode/single-mode or SFP port
All models support Ethernet to fiber or Ethernet to SFP port
Fast Ethernet models offer LFP (Link Fault Pass-through) function via a DIP switch
All models operate in full/half duplex mode
All models use store-and-forward transmission
All have highly reliable rigid IP-30 housing
All mount on a DIN-Rail or wall
Gigabit models support jumbo frame up to 10240 bytes
Gigabit models have a relay output to carry capacity of 1 A at 24 VDC
2.3 AVAILABLE MODELS
Six models are available:
Fast Ethernet Industrial Media Converter SFP (LMC280A)
Fast Ethernet Industrial Media Converter MM SC (LMC281A)
Fast Ethernet Industrial Media Converter SM SC (LMC282A)
Gigabit Ethernet Industrial Media Converter SFP (LGC280A)
Gigabit Ethernet Industrial Media Converter MM SC (LGC281A)
Gigabit Ethernet Industrial Media Converter SM SC (LGC282A)

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CHAPTER 2: OVERVIEW
2.4 WHAT’S INCLUDED
Package Contents
(1) Fast Ethernet or Gigabit Industrial Media Converter unit
(1) Wallmounting kit (2 brackets, 8 screws)
(1) DIN Rail kit (installed)
(1) 4-position terminal block (LMC280A, LMC281A, LMC282A models only)
(1) 6-posiiton terminal block (LGC280A, LGC281A, LGC282A models only)
(1) Dust cover
You Will Also Need
(1) Power supply
(1) Fiber SFP module (required for LMC280A and LGC280A models only)
2.5 HARDWARE DESCRIPTION
2.5.1 LMC280A, LMC281A, LMC282A
Figure 2-1 shows the front panels of the LMC280A, LMC281A, and LMC282A units. Table 2-1 describes their components.
1, 2
4, 5
7
8
9
10
3
6
A
1, 2
4, 5
7
8
9
10
3
6
B
1, 2
4, 5
7
8
9
10
3
6
C
FIGURE 2-1. FRONT PANELS OF THE FAST ETHERNET MEDIA CONVERTERS

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CHAPTER 2: OVERVIEW
TABLE 2-1. FRONT-PANEL COMPONENTS
NUMBER COMPONENT DESCRIPTION
1 (1) P1 LED Lights when power to the unit is on
2 (1) P2 LED Lights when redundant power to the unit is on
3 (1) LFP LED Lights when link fault is detected
4 (1) DPX LED
Copper port duplex LED:
Green for port duplex indicator:
ON: Full-Duplex,
OFF: Half-Duplex
5 (1) DPX LED
Fiber port duplex LED:
Green for port duplex indicator:
ON: Full-Duplex,
OFF: Half-Duplex
6 (1) Link/Activity LED
Link/Activity LED:
Green for fiber port Link/Act:
ON: Link up,
Flashing: Acting,
OFF: Link down
A (1) SFP Slot Fiber SFP module installs here
B(2) SC connectors Provides multimode fiber connection
C(2) SC connectors Provides single-mode fiber connection
7(1) 4-position DIP switch Sets Link Fault Protection (LFP) enable/disable
8 (1) Link/Activity LED
Green for Link/Act:
ON: Link up,
Flashing: Acting,
OFF: Link down
9 (1) Speed LED
Amber for 100 Mbps/10 Mbps indicator:
ON: Link at 100 Mbps,
OFF: Link at 10 Mbps
10 (1) RJ-45 port 10/100 RJ-45 port links to Fast Ethernet
Figure 2-2 shows the top panel common to all of the LMC280A, LMC281A, and LMC282A units. Table 2-2 describes its components.
1 2
FIGURE 2-2. TOP PANEL COMMON TO ALL OF THE FAST ETHERNET MEDIA CONVERTERS
TABLE 2-2. TOP-PANEL COMPONENTS
NUMBER COMPONENT DESCRIPTION
1(1) 4-position terminal block Carries 12-48 VDC power to the media converter
2 (1) Grounding screw Connects to chassis ground

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CHAPTER 2: OVERVIEW
Figure 2-3 shows the back panel common to all of the LMC280A, LMC281A, and LMC282A units. Table 2-3 describes its components.
1
2
FIGURE 2-3. BACK PANEL COMMON TO ALL OF THE FAST ETHERNET MEDIA CONVERTERS
TABLE 2-3. BACK-PANEL COMPONENTS
NUMBER COMPONENT DESCRIPTION
1(1) DIN rail bracket Use to mount the media converter on a DIN rail
2(3) screws Attaches the DIN rail bracket to the media converter
2.5.2 LGC280A, LGC281A, LGC282A
Figure 2-4 shows the front panels of the LGC280A, LGC281A, and LGC282A units. Table 2-4 describes their components.
1, 2
4
5
6
3
A
1, 2
4
5
6
3
B
1, 2
4
5
6
3
C
FIGURE 2-4. FRONT PANELS OF THE GIGABIT ETHERNET MEDIA CONVERTERS

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CHAPTER 2: OVERVIEW
TABLE 2-4. FRONT-PANEL COMPONENTS
NUMBER COMPONENT DESCRIPTION
1 (1) P1 LED Lights when power to the unit is on
2 (1) P2 LED Lights when redundant power to the unit is on
3 (1) Fault LED Amber: Indicates power failure
4 (1) Link/Activity LED
10/100/1000BASE-T(X) RJ-45 Port Indicator:
Green for port Link/Act.;
Amber for 100 Mbps indicator
A (1) SFP Slot Fiber SFP module installs here
B(2) SC connectors Provides multimode fiber connection
C(2) SC connectors Provides single-mode fiber connection
5 (1) Link/Activity LED 1000BASE-X port indicator:
Green for port Link/Act
6 (1) RJ-45 port 10/100/1000 RJ-45 port links to Gigabit Ethernet
Figure 2-5 shows the top panel common to all of the LGC280A, LGC281A, and LGC282A units. Table 2-5 describes its components.
1 2 3
FIGURE 2-5. TOP PANEL COMMON TO ALL OF THE GIGABIT ETHERNET MEDIA CONVERTERS
TABLE 2-5. TOP-PANEL COMPONENTS
NUMBER COMPONENT DESCRIPTION
1(1) 6-position terminal block Carries 12-48 VDC power to the media converter
2(1) 2-position DIP switch Enables or disables Relay function
3 (1) Grounding screw Connects to chassis ground

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CHAPTER 2: OVERVIEW
Figure 2-6 shows the back panel common to all of the LGC280A, LGC281A, and LGC282A units. Table 2-6 describes its components.
1
2
FIGURE 2-6. BACK PANEL COMMON TO ALL OF THE GIGABIT ETHERNET MEDIA CONVERTERS
TABLE 2-6. BACK-PANEL COMPONENTS
NUMBER COMPONENT DESCRIPTION
1(1) DIN rail bracket Use to mount the media converter on a DIN rail
2(3) screws Attaches the DIN rail bracket to the media converter

17
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CHAPTER 3: CONFIGURATION
3.1 POWER CONNECTION GUIDE (LMC280A, LMC281A, LMC282A)
See the diagram below.
PWR-2
DC12-48V
G
PWR-1
Power Supply
12–48 VDC
Power Supply
12–48 VDC
V+
V-
Frame
Ground
V+ V-
FIGURE 3-1. POWER CONNECTION GUIDE FOR FAST ETHERNET MEDIA CONVERTERS
3.2 POWER CONNECTION GUIDE (LGC280A, LGC281A, LGC282A)
See the diagram below.
DC12-48V
L
PWR-2
V2+ V2- V1+ V1-
G
1A@24V
PWR-1
Power Supply
12–48 VDC
Power
Supply
Warning
Device
Power Supply
12–48 VDC
V+
V+
V-
V-
Frame
Ground
DIP Switch Select for
Power Alarm Output
+24 V GND
FIGURE 3-2. POWER CONNECTION GUIDE FOR GIGABIT ETHERNET MEDIA CONVERTERS

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CHAPTER 3: CONFIGURATION
3.3 10/100BASE-TX OR 1000BASE-T ETHERNET PORT CONNECTIONS
3.3.1 10/100BASE-TX ETHERNET PORT CONNECTIONS
TABLE 3-1. RJ-45 (8-PIN, MDI) PORT PINOUTS
PIN NUMBER SIGNAL CONNECTOR
1TX+
18
2RX-
3RX+
6RX-
TABLE 3-2. RJ-45 (8-PIN, MDIX) PORT PINOUTS
PIN NUMBER SIGNAL CONNECTOR
1RX+
18
2RX-
3TX+
6TX-
3.3.2 1000BASE-T ETHERNET PORT CONNECTIONS
TABLE 3-3. RJ-45 (8-PIN, MDI) PORT PINOUTS
PIN NUMBER SIGNAL CONNECTOR
1BI_DA+
18
2BI_DA-
3BI_DB+
4BI_DC+
5BI_DC-
6BI_DB-
7BI_DD+
8BI_DD-

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CHAPTER 3: CONFIGURATION
TABLE 3-4. RJ-45 (8-PIN, MDIX) PORT PINOUTS
PIN NUMBER SIGNAL CONNECTOR
1BI_DB+
18
2BI_DB-
3BI_DA+
4BI_DD+
5BI_DD-
6BI_DA-
7BI_DC+
8BI_DC-
3.3.3 RJ-45 (8-PIN) TO RJ-45 (8-PIN) STRAIGHT-THROUGH CABLE WIRING
See the diagram below.
Switch port NIC port
Straight-through cable
RJ-45
connector
Tx+ 3
Tx- 6
Rx+ 1
Rx- 2
RJ-45
connector
3 Rx+
6 Rx-
1 Tx+
2 Tx-
RJ-45 plug pin 1
FIGURE 3-3. RJ-45 STRAIGHT-THROUGH WIRING DIAGRAM
3.3.4 RJ-45 (8-PIN) TO RJ-45 (8-PIN) CROSSOVER CABLE WIRING
See the diagram below.
Switch port
(NIC port)
Switch port
(NIC port)
Crossover cable
RJ-45
connector
(Rx+) Tx+ 3
(Rx-) Tx- 6
(Tx+) Rx+ 1
(Tx-) Rx- 2
RJ-45 plug pin 1
RJ-45
connector
1 Rx+ (Tx+)
2 Rx- (Tx-)
3 Tx+ (Rx+)
6 Tx- (Rx-)
FIGURE 3-4. RJ-45 CROSSOVER WIRING DIAGRAM

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CHAPTER 3: CONFIGURATION
3.4 100BASE-FX OR 1000BASE-SX/LX ETHERNET PORT CONNECTIONS
3.4.1 SC PORT TO SC PORT CABLE WIRING
SC port pinouts SC port pinouts
SC port to SC port
cable wiring
TX
RX
RX
TX
FIGURE 3-5. SC PORT TO SC PORT CABLE WIRING
3.4.2 ST PORT TO ST PORT CABLE WIRING
ST port pinouts ST port pinouts
ST port to ST port
cable wiring
TX
RX
RX
TX
Cable wiring
TX
RX
RX
TX
FIGURE 3-6. ST PORT TO ST PORT CABLE WIRING
3.4.3 LC PORT TO LC PORT CABLE WIRING
Tx
Rx
Rx
Tx
LC port pinouts LC port pinouts
LC port to LC port
cable wiring
TX
RX
RX
TX
FIGURE 3-7. LC PORT TO LC PORT CABLE WIRING