Moxa Technologies IMC-21A series Handbuch

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P/N: 1802000210021

IMC-21A

Hardware Installation Guide

Moxa Industrial Media Converter

Third Edition, June 2012

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- 2 -

Overview

The Moxa Industrial Media Converter IMC-21A series consists of

entry-level 10/100BaseT(X) to 100BaseFX media converters that provide

a cost-effective solution, and are specially designed for reliable and stable

operation in harsh industrial environments.

NOTE

Throughout this Hardware Installation Guide, we use IMC as

abbreviation for Industrial Media Converter:

IMC = Industrial Media Converter

Package Checklist

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

is missing or damaged, please contact your customer service

representative for assistance.

•IMC-21A media converter

•Hardware installation guide (this guide)

•Warranty card

Features

•Power inputs: 12 to 48 VDC

•The TP port’s connection speed, Half/Full duplex mode, and

Force/Auto mode are all DIP switch selectable

•The fiber port’s Half/Full duplex mode is DIP switch selectable

•Supports Link Fault Pass-Through (LFP)

•DIN-Rail mountable

•Multi mode and single mode models with SC or ST fiber connectors

are available

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

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- 3 -

Panel Layout

1. DIP switch

2. Reset button

3. Terminal block for power input and

grounding

4. Power input LED

5. 100BaseFX (SC/ST connector) port

6. FX port's 100 Mbps LED

7. FX port's FDX/COL LED

8. TP port’s 100 Mbps LED

9. TP port's 10 Mbps LED

10.

10/100BaseT(X) port

11.

DIN-Rail kit

NOTE:

The IMC-21A series includes the

IMC

-21A-M-SC, IMC-21A-M-ST, and

IMC

-21A-S-SC.

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- 4 -

Mounting Dimensions

DIN-Rail Mounting

The aluminum DIN-Rail attachment plate should be fixed to the back

panel of the IMC-21A when you take it out of the box. If you need to

reattach the DIN-Rail attachment plate to the IMC-21A, make sure the

stiff metal spring is situated towards the top.

Wiring Requirements

Safety First!

•

Be sure to disconnect the power cord before installing

and/or wiring your Moxa IMC.

•

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.

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- 5 -

•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.

•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 Moxa IMC

Grounding and wire routing help limit the effects

of noise due to electromagnetic interference

(EMI). Run the ground connection from the right

most

connector of the 3-contact terminal block to

the grounding surface prior to connecting

devices.

ATTENTION

This product is intended to be mounted to a well

-grounded

mounting surface such as a metal panel.

Wiring the Power Inputs

The two left-most contacts of the 3-contact terminal block connector on

the IMC’s top panel are used for the IMC’s DC inputs. Take the following

steps to wire the IMC’s DC power inputs:

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, which is located on IMC’s top panel.

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- 6 -

Communication Connections

RJ45 Ethernet Port Connection

The IMC-21A has one 10/100BaseT(X) Ethernet port located on the front

panel for connecting to Ethernet-enabled devices.

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 shown below:

MDI Port Pinouts

MDI-X Port Pinouts

8-pin RJ45

Signal

Tx+

Rx+

Tx-

Rx-

Rx+

Tx+

Rx-

Tx-

Straight-Through Cable Wiring

Cross-Over Cable Wiring

Fiber Optic Port Connection

The concept behind the SC/ST port and cable is quite 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).

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- 7 -

SC-Port Pinouts

SC-Port to SC-Port Cable Wiring

ST-Port Pinouts

ST-Port to ST-Port Cable Wiring

ATTENTION

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

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

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- 8 -

DIP Switch Settings

DIP

No.

Function ON OFF

Force Fiber Port

Duplex

Full Duplex*Half Duplex

“

ON”: Forces Full Duplex on Fiber port.

“OFF”: Forces Half Duplex on Fiber port.

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.

Force TP Duplex

Full Duplex*

Half Duplex

(Only when Auto Negotiation (DIP 5) is disabled)

“ON”: Forces Full Duplex on Ethernet port.

“OFF”: Forces Half Duplex on Ethernet port.

Force TP Speed

100Mbps*

10Mbps

(Only when Auto Negotiation (DIP 5) is disabled)

“ON”: Forces 100Mbps on Ethernet port.

“

OFF”: Forces 10Mbps on Ethernet port.

Auto Negotiation

Enable*

Disable

“

ON”: Enables “Auto Negotiation” function, the

speed and duplex states for each port link segment

are automatically configured using the highest

performance interoperation mode.

“OFF”: Disables “Auto Negotiation” function, the

speed and duplex states depend on the DIP 3 & 4

configuration.

*Default setting

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

power on the IMC-21A, or use a pointed object to hold the reset button

down for five seconds to activate the new setting.

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- 9 -

LED Indicators

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

function of each LED is described in the table below.

LED

Color

State

Description

PWR

AMBER

Power is being supplied to the power

input.

Off Power is not being supplied to the

power

input.

100M

(FX)

GREEN

FX port’s 100 Mbps link is active.

Blinking

Data is being transmitted at 100 Mbps.

Off

FX Port’s 100 Mbps link is inactive.

FDX/COL

(FX)

GREEN

100BaseFX port is transmitting in full

duplex mode.

Blinking

A data collision has occurred.

Off

100BaseFX port is transmitting in half

duplex mode.

100M

(TP)

GREEN

TP port’s 100 Mbps link is active.

Blinking

Data is being transmitted at 100 Mbps.

Off

TP port’s 100 Mbps link is inactive.

10M

(TP)

GREEN

TP port’s 10 Mbps link is active.

Blinking

Data is being transmitted at 10 Mbps.

Off

TP port’s 10 Mbps link is inactive.

LFP: DIP switch is set to “LFP” mode

Device1

TP LED

DUTA TP

LNK LED

DUTA FO

LED

DUTB FO

LED

DUTB TP

LNK LED

Device 2

TP LED

TP1

Faulted

OFF OFF OFF OFF OFF OFF

F1 Faulted

OFF

F2 Faulted

OFF

TP2

Faulted

OFF

DUTA

DUTB

TP1

TP2

Device1

Device2

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- 10 -

LFP: DIP switch is set to “DIS” mode

Device1

TP LED

DUTA TP

LNK LED

DUTA FO

LED

DUTB FO

LED

DUTB TP

LNK 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’s

10/100BaseT(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.

Dual Speed Functionality and Switching

The Moxa IMC’s 10/100 Mbps switched RJ45 port auto negotiates with the

connected device for the fastest data transmission rate supported by both

devices. All models of Moxa IMC are plug-and-play devices, so that

software configuration is not required during installation or maintenance.

The half/full duplex mode for the switched RJ45 ports is user dependent

and changes (by auto-negotiation) to full or half duplex, depending on

which transmission speed is supported by the attached device.

Auto-Negotiation and Speed Sensing

The IMC-21A series’ RJ45 Ethernet port supports auto-negotiation in

10BaseT and 100BaseT(X) modes, with operation governed by 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.

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

then each time a LINK is enabled. The Moxa IMC advertises its capability

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

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

Depending on which type of device is connected, the devices will agree to

operate at either 10 Mbps or 100 Mbps.

If a Moxa IMC’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.

DUTA

DUTB

TP1

TP2

Device1

Device2

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