Moxa Technologies IMC-21GA-T Manual

P/N: 1802000210031

IMC-21GA

Hardware Installation Guide

Moxa Industrial Media Converter

Second Edition, October 2014

- 2 -

Overview

The IMC-21GA series includes industrial 10/100/1000BaseT(X) to

100/1000BaseFX media converters that provide a cost-effective solution,

and are specially designed for reliable and stable operation in industrial

environments.

Package Checklist

Moxa’s IMC-21GA is shipped with the following items. If any of these

items are missing or damaged, please contact your customer service

representative for assistance.

•IMC-21GA media converter

•Hardware installation guide (this guide)

•Warranty card

Features

•The fiber port’s connection speed is DIP switch selectable

•Supports Link Fault Pass-Through (LFP)

•DIN rail mountable

•Multi mode (0.5 km) and single mode (10 km) models with SC fiber

connectors are available

•Operating temperature range from -40 to 75°C (T models)

•10K Jumbo Frame

•Redundant power inputs

•Supports Energy Efficient Ethernet (IEEE 802.3 az)

- 3 -

Panel Layout

1. Shielding Ground

2. Terminal block for power

input

3. Dip switch

4. Power LED

5. Gigabit Copper (G1) / Fiber

(G2) Port LED

6. SFP module slot

7. 10/100/1000BaseT(X) Port

8. SX/LX Fiber Port, SC

connector

9. DIN rail kit

- 4 -

Mounting Dimensions

DIN Rail Mounting

The aluminum DIN rail attachment

plate should be fixed to the back

panel of the

IMC-21GA when you

take it out of the box. If you need to

reattach the DIN

rail attachment

plate to the

IMC-21GA, make sure

the stiff metal spring is situated

towards the top.

Wiring Requirements

ATTENTION

Safety First!

Be sure to disconnect the power cord before installing and/or

wiring your IMC

-21GA.

Calculate the maximum possible current in each power wire and

common wire. Observe all electrical codes

dictating the

maximum current allowable for each wire size.

If the current goes above the maximum rating, the wiring could

overheat, causing serious damage to your equipment.

•Use separate paths to route wiring for power and devices. If power

wiring and device wiring paths must cross, make sure the wires are

perpendicular at the intersection point.

- 5 -

•Do not run signal or communications wiring and power wiring in the

same wire conduit. To avoid interference, wires with different signal

characteristics should be routed separately.

•You can use the type of signal transmitted through a wire to

determine which wires should be kept separate. The rule of thumb is

that wiring that shares similar electrical characteristics can be

bundled together.

•Keep input wiring and output wiring separated.

•We strongly advise that you label wiring to all devices in the system.

Grounding the IMC-21GA

Grounding and wire routing help limit the effects

of noise due to electromagnetic interference

(EMI). Run the ground connection from the

ground screw to the grounding surface prior to

connecting devices

ATTENTION

This pro

duct is intended to be mounted to a well-grounded

mounting surface such as a metal panel.

Wiring the Power Inputs

The 4-contact terminal block connector on the IMC-21GA’s top panel is

used for the IMC-21GA’s two DC inputs. Top and front views of one of the

terminal block connectors are shown here.

STEP 1:

Insert the negative/positive DC wires

into the V

-/V+ terminals.

STEP 2: 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.

STEP 3:

Insert the plastic terminal block

connector prongs into the terminal block receptor

located on IMC

-21GA’s top panel.

Redundant Power Inputs

Both power inputs can be connected simultaneously to live DC power

sources. If one power source fails, the other live source acts as a backup,

and automatically supplies all of the IMC-21GA’s power needs.

- 6 -

Communication Connections

RJ45 Ethernet Port Connection

The IMC-21GA has one 10/100/1000BaseT(X) Ethernet port located on

the front panel for connecting to Ethernet-enabled devices.

When connected to a 10/100 Mbps Ethernet port, the pinouts and cable

wiring diagrams for both MDI (NIC-type) and MDI-X (HUB/switch-type)

ports for both straight-through and cross-over Ethernet cables are:

MDI Port Pinouts

MDI-X Port Pinouts

8-pin RJ45

Signal

Tx+

Tx-

Rx+

Rx-

Signal

Rx+

Rx-

Tx+

Tx-

Straight-Through Cable Wiring

Cross-Over Cable Wiring

1000BaseT(X) Ethernet Port Connection

1000BaseT(X) data is transmitted on differential TRD+/- signal pairs over

copper wires. When connected to a 1000 Mbps Ethernet port, the pinouts

and cable wiring diagrams for both MDI (NIC-type) and MDI-X

(HUB/switch-type) ports for both straight-through and cross-over

Ethernet cables are:

MDI/MDI-X Port Pinouts

Signal

TRD (0) +

TRD (0) -

TRD (1) +

TRD (2) +

TRD (2) -

TRD (1) -

TRD (3) +

TRD (3) -

- 7 -

1000BaseSFP Fiber Port Connection

The Gigabit Ethernet ports on the IMC-21GA are 1000BaseSFP Fiber ports,

which require using Gigabit mini-GBIC fiber transceivers to work

properly.

The concept behind the LC port and cable is straightforward. Suppose you

are connecting devices I and II; contrary to electrical signals, optical

signals do not require a circuit in order to transmit data. Consequently,

one of the optical lines is used to transmit data from device I to device II,

and the other optical line is used transmit data from device II to device I,

for full-duplex transmission.

Remember to connect the Tx (transmit) port of device I to the Rx (receive)

port of device II, and the Rx (receive) port of device I to the Tx (transmit)

port of device II. If you make your own cable, we suggest labeling the two

sides of the same line with the same letter (A-to-A and B-to-B, as shown

below, or A1-to-A2 and B1-to-B2).

LC-Port Pinouts

LC-Port to LC-Port Cable Wiring

1000BaseSX/LX Fiber Port (IMC-21GA-SX-SC,

IMC-21GA-LX-SC)

The concept behind the SC port and cable is straightforward. Suppose you

are connecting devices I and II. Contrary to electrical signals, optical

signals do not require a circuit in order to transmit data. Consequently,

one of the optical lines is used to transmit data from device I to device II,

and the other optical line is used transmit data from device II to device I,

for full-duplex transmission.

All you need to remember is to connect the Tx (transmit) port of device I

to the Rx (receive) port of device II, and the Rx (receive) port of device I

to the Tx (transmit) port of device II. If you make your own cables, we

suggest labeling the two sides of the same line with the same letter

(A-to-A and B-to-B, as shown below, or A1-to-A2 and B1-to-B2).

SC-Port Pinouts

SC-Port to SC-Port Cable Wiring

- 8 -

ATTENTION

The IMC

-21GA is only compatible with transceiver modules from

Moxa's SFP

-1G series and SFP-1FE series. If you are using the

SFP

-1FESLC-T, SFP-1FELLC-T, or SFP-1FEMLC-T, use version

V1.3 or above to ensure that the IMC

-21GA's media converter

functionality works properly.

ATTENTI

This is a Class 1 Laser/LED product. To avoid causing serious

damage to your eyes, do not stare directly into the laser beam.

DIP Switch Settings

Dip No.

Function

OFF

Fiber Speed

100M

1000M*

“ON”: Forces 100 Mbps on fiber port

Note: When setting the mode for the IMC-21GA, use Moxa

SFP-1FE Series SFP modules

“OFF”: Forces 1000 Mbps on fiber port

Note: When setting the mode for the IMC-21GA, use Moxa

SFP-1G Series SFP modules

Energy Efficient Ethernet

Enable

Disable*

“ON”: Enable “Energy Efficient Ethernet” to

allow for less power

consumption during periods of low data activity

“OFF”: Disable “Energy Efficient Ethernet”

Link Fault Pass Through

Enable

Disable*

“ON”: Enables “Link Fault Pass Through”, the link status on the

TX port will inform the FX port of the same device and vice

versa.

“OFF”: Disables “Link Fault Pass Through”, the link status on

the TX port will not inform the FX port.

Reserved

*Default setting

After changing the DIP switch setting, you will need to power off and then

power on the IMC-21GA.

- 9 -

LED Indicators

The front panel of the Moxa IMC-21GA contains several LED indicators.

The function of each LED is described in the table below.

LED

Color

State

Description

PWR1

Amber

Power is being supplied to power input (V1+, V1-)

Off Power is not being supplied to power input

(V1+, V1-)

PWR2

Amber

Power is being supplied to power input (V2+, V2-)

Off

Power is not being supplied to power input

(V2+, V2-)

GREEN

TP port’s 1000 Mbps link is active

Blinking

Data is being transmitted at 1000 Mbps

Off

TP port’s 1000 Mbps link is inactive

Amber

TP port’s 10/100 Mbps link is active

Blinking

Data is being transmitted at 10/100 Mbps

Off

TP port’s 10/100 Mbps link is inactive

GREEN

Fiber port’s 1000 Mbps link is active

Blinking

Data is being transmitted at 1000 Mbps

Off

Fiber port’s 1000 Mbps link is inactive

Amber

Fiber port’s 100 Mbps link is active

Blinking

Data is being transmitted at 100 Mbps

Off

Fiber port’s 100 Mbps link is inactive

LFP: DIP switch is set to “LFP” mode

Device1

TP LED

DUTA TP

LNK

(G1)

LED

DUTA FO

(G2) LED

DUTB FO

(G2) LED

DUTB TP

LNK

(G1)

LED

Device 2

TP LED

TP1 Faulted

OFF

F1 Faulted

OFF

F2 Faulted

OFF

TP2 Faulted

OFF

- 10 -

LFP: DIP switch is set to “DIS” mode

Device1

TP LED

DUTA TP

LNK

(G1)

LED

DUTA FO

(G2) LED

DUTB FO

(G2) LED

DUTB TP

LNK

(G1)

LED

Device 2

TP LED

TP1 Faulted

OFF

F1 Faulted

OFF

F2 Faulted

OFF

TP2 Faulted

OFF

Auto MDI/MDI-X Connection

The Auto MDI/MDI-X function allows users to connect the Moxa

IMC-21GA’s 10/100/1000BaseT(X) ports to any kind of Ethernet device,

regardless of the type of Ethernet cable used for the connection. This

means that you can use either a straight-through cable or cross-over

cable to connect the IMC to Ethernet devices.

Auto-Negotiation and Speed Sensing

All of the IMC-21GA’s RJ45 Ethernet ports independently support

auto-negotiation for transmission speeds of 10 Mbps, 100 Mbps , and

1000 Mbps, with operation according to the IEEE 802.3u standard.

This means that some nodes could be operating at 10 Mbps, while at the

same time, other nodes are operating at 100 Mbps or 1000 Mbps.

Auto-negotiation takes place when an RJ45 cable connection is made, and

then each time a LINK is enabled. The IMC-21GA advertises its capability

for using 10 Mbps, 100 Mbps, or 1000 Mbps transmission speeds, with the

device at the other end of the cable expected to advertise similarly.

Depending on what type of device is connected, this will result in

agreement to operate at a speed of 10 Mbps, 100 Mbps, or 1000 Mbps.

If the IMC-21GA’s RJ45 Ethernet port is connected to a non-negotiating

device, it will default to 10 Mbps speed and half-duplex mode, as required

by the IEEE 802.3u standard.

Specifications

Technology

Standards

IEEE 802.3, 802.3u, 802.3ab, 802.3z, 802.3az

Interface

RJ45 Port

10/100/1000BaseT(X), RJ45 connector

Fiber Port

IMC-21GA-SX/LX-SC: 100/1000Base-SX/LX, SC

connector

IMC-21GA: 100/1000BaseSFP slot

LED Indicators

Power (PWR1, PWR2), G1 (TP Port), G2 (Fiber

Port)

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