Amplicon Magic 485F25 User Manual

Magic 485F Adapter
Amplicon products are produced in the United Kingdom under a quality system
approved by the British Standards Institution
Magic 485F25 & F9
RS 232-485
AUTOMATIC
RS 485
TRANSMITTER
ENABLE
This Instruction Manual is supplied with the Magic 485F Adapter to provide the user with sufficient information to
utilise the purchased product in a proper and efficient manner. The information contained has been reviewed and is
believed to be accurate and reliable, however Amplicon Liveline Limited accepts no responsibility for any
problems caused by errors or omissions. Specifications and instructions are subject to change without notice.
Magic 485F Instruction Manual Part Nº 859 933 74 Issue A3
© Amplicon Liveline Limited
Prepared by James Chisholm
Approved for issue by A.S. Gorbold, Operations Director
BS EN ISO 9001
Certificate No. FM 15094
Affirmed by
Declaration of Conformity

Amplicon Magic 485F25 Specifications

Electrical Specifications

supply voltage	+5.0 VDC to +12.0 VDC
supply current	50 mA plus current drawn by output loads
supply current fully loaded	100 mA
RS232 'High' signal input	+2.4 to +30 V
RS232 'Low' signal input	–30 to +0.8 V
RS232 input resistance	5 kΩ
RS232 'High' signal output	+9 V
RS232 'Low' signal output	–9 V
RS232 output resistance	300 Ω
RS422/485 input sensitivity	0.2 V
RS422/485 input hysteresis	70 mV
RS422/485 output drive	1.5 V minimum, fully loaded
RS422/485 output load	27 Ω minimum
RS422/485 receiver I/P termination	120 Ω resistor across differential input terminals
data rate	120 kBd max

Physical and Environmental Specifications

size with connector packed	67 x 53 x 20 mm
packed size	215 x 180 x 80 mm
weight with connector packed	60 gm
packed weight	250 gm
operating temperature range	0° C to +60° C
storage temperature range	-20 to +70° C

Summary

Introduction to Magic 485F

General Description of Magic 485F

Describes the function and unique features of the Magic 485F converter, highlighting its RTS-free turnaround control.

Products Covered in Manual

Lists the different models (485F, 485F25, 485F9) covered by the manual and their specific references.

Circuit Operation Explained

Explains the electrical level conversion from RS232 to RS422/485 and vice versa using TTL levels.

Technical Support and Repairs

Obtaining Technical Support

Provides contact information for technical assistance, including telephone, fax, and email.

Product Repair Procedure

Outlines the procedure for returning the adapter for repair, including warranty and RMA process.

Installation Instructions

Host Equipment Requirements

Specifies the RS232 port types (DB-25, DB-9) required for connecting the adapters.

Connecting the 485F Adapter

Details how to make RS232, RS422/485, and power connections via the terminal strip.

Magic 485F Adapter Configuration

Board Layout and Jumper Positions

Illustrates the board layout and jumper positions for the 485F25 and 485F9 models.

Configurable Options

Explains how to configure options like DCE/DTE, local echo, and transmission line termination.

Transmitter Turnaround Delay Settings

Details how to fine-tune the transmitter turnaround delay for optimal RS485 operation.

Power and Accessories

Power Supply Requirements

Details the external power supply requirements, voltage, and current for the adapter.

Connecting Mains Adapter

Instructions on how to connect the specific Amplicon mains adapter to the adapter's terminals.

UK Mains Adapter Power Supply

Describes the UK mains adapter, its order code, and specifications.

International Mains Adapter Power Supply

Describes the international mains adapter, its order code, and specifications.

Technical Specifications

Electrical Specifications

Lists detailed electrical parameters like voltage, current, signal levels, and data rate.

Physical and Environmental Specifications

Provides physical dimensions, weight, and operating/storage temperature ranges.