SERCOS Fiber Optic

Transmitters and Receiver

Technical Data

HFBR-0600 Series

Features

• Fully Compliant to SERCOS

Optical Specifications

• Optimized for 1 mm Plastic

Optical Fiber

• Compatible with SMA

Connectors

• Auto-Insertable and Wave

Solderable

• Data Transmission at

Symbol Rates from DC to

over 2 MBd for Distances

from 0 to over 20 Metres

Applications

• Industrial Control Data

Links

• Reduction of Lightning and

Voltage Transient Suscepti-

bility

• Tempest-Secure Data

Processing Equipment

• Isolation in Test and

Measurement Instruments

• Robotics Communication

SERCOS

SERCOS is a SErial Realtime

COmmunication System, a

standard digital interface for

communication between controls

and drives for numerically

controlled machines. The SERCOS

interface specification was written

by a joint working group of the

VDW (German Machine Tool

Builders Association) and ZVEI

(German Electrical and Electronic

Manufacturer’s Association) to

allow data exchange between NC

controls and drives via fiber optic

rings, with isolation and noise

immunity. The HFBR-0600 family

of fiber optic transmitters and

receivers comply to the SERCOS

specifications for transmitter and

receiver optical characteristics

and connector style (SMA).

Description

The HFBR-0600 components are

capable of operation at symbol

rates from DC to over 2 MBd and

distances from 0 to over 20

metres. The HFBR-1602 and

HFBR-1604 transmitters contain

a 655-nm AlGaAs emitter capable

of efficiently launching optical

power into 1000

µm plastic

optical fiber. The optical output is

specified at the end of 0.5 m of

plastic optical fiber.

The HFBR-1604 is a selected

version of the HFBR-1602, with

power specified to meet the

SERCOS high attenuation

specifications.

The HFBR-2602 receiver incor-

porates an integrated photo IC

containing a photodetector and dc

amplifier driving an open-

collector Schottky output

transistor. The HFBR-2602 is

designed for direct interfacing to

popular logic families. The

absence of an internal pull-up

resistor allows the open-collector

output to be used with logic

families such as CMOS requiring

voltage excursions higher than

V

dynamic range of 15 dB.

CAUTION: The small junction sizes inherent to the design of this component increase the component's

susceptibility to damage from electrostatic discharge (ESD). It is advised that normal static precautions be

taken in handling and assembly of this component to prevent damage and/or degradation which may be

induced by ESD.