RAD Data comm 4-Wire Symmetrical VDSL Modem ASM-60 Manual do Utilizador descarregar pdf (Página 16)

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143

RAD Data Communications 2009 Catalog

M I N I A T U R E F I B E R M O D E M S /

M I N I A T U R E C O P P E R M O D E M S

•

Converts from RS-485 to fiber

•

Asynchronous transmission up to

115.2 kbps

•

Full duplex over 4-wire or half duplex

over 2-wire

•

V.54 diagnostics

•

LED indicators for status display

The FOM-485 is an asynchronous miniature

fiber optic modem that transmits RS-485 signals

over fiber optic cables. The FOM-485 is used in

utility applications where there is a need to

connect the main controller to a remote

terminal unit (RTU).

The FOM-485 allows connection of up to

32 RTUs to a single host, at a wide range of

data rates up to 115.2 kbps.

The FOM-485 supports full duplex transmission

over 4-wire or half duplex over 2-wire cables. It

supports diagnostic capabilities complying with

the ITU V.54 standard.

The modem has six LED indicators to display the

status of the modem: TD, RD, DCD, RTS, TEST,

and ERR.

FOM-485

Miniature RS-485 Fiber Optic Modem

FOM-485

RS-485

4-wire

Main

controller

Fiber

RTU

FOM-485

For latest updates visit www.rad.com

•

4-wire, full or half duplex

•

Selectable data rates: 1.2 to 19.2 kbps

•

Range up to 5 km (3 miles) at 9.6 kbps

•

Transfers one control signal

•

Internal, external or loopback clock

•

No external power required

•

LED indicator for carrier detect

•

Line connector options: terminal block,

RJ-12 and RJ-45

The sub-miniature SRM-5SC is a short range

modem connecting full or half duplex

synchronous terminals, controllers and

computers in point-to-point or point-to-

multipoint applications. The modem operates at

data rates from 1.2 kbps to 19.2 kbps (selectable)

with a range of 5 km (3.0 miles) at 9.6 kbps.

Three alternative sources for transmit timing are

available: internal oscillator, external clock from

the terminal or loopback clock derived from the

receive signal. The carrier can be strapped for

continuous operation or switched operation

controlled by the RTS signal.

The unit has an RS-232-C/V.24 interface, and is

available with a choice of a male or female

integral 25-pin connector for the DTE interface

and a 5-screw (4-wire and ground) terminal

block for the line. The SRM-5SC has both a

terminal block and RJ-45 or RJ-12 as its line

connectors.

SRM-5SC

Sync Multipoint Short Range Modem

Approximate Range (for 24 AWG/0.5 mm)

Data Rate

kbps km miles

19.2 4.5 2.8

9.6 5.0 3.0

4.8 6.0 3.7

1.2-2.4 6.5 4.0

SRM-5SC

Sync

computer

4-wire

Sync

terminal

SRM-5SC

For latest updates visit www.rad.com

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