SeaLevel SeaLINK+485-DB9 User manual

SeaLINK+485-DB9

User Manual | 2107

Contents

CONTENTS............................................................................................................................................................................................................................2

BEFORE YOU GET STARTED..............................................................................................................................................................................................3

INTRODUCTION...................................................................................................................................................................................................................4

ELECTRICAL SPECIFICATIONS .......................................................................................................................................................................................10

TECHNICAL SPECIFICATIONS..........................................................................................................................................................................................11

HARDWARE CONFIGURATION .......................................................................................................................................................................................12

INSTALLATION & CONFIGURATION..............................................................................................................................................................................13

HARDWARE INSTALLATION............................................................................................................................................................................................15

APPENDIX A - HANDLING INSTRUCTIONS..................................................................................................................................................................21

APPENDIX B – TROUBLESHOOTING.............................................................................................................................................................................22

APPENDIX C – ELECTRICAL INTERFACE......................................................................................................................................................................23

APPENDIX D – ASYNCHRONOUS COMMUNICATIONS.............................................................................................................................................24

APPENDIX E – CABLE DRAWING...................................................................................................................................................................................25

APPENDIX F – HOW TO GET ASSISTANCE ..................................................................................................................................................................26

WARRANTY ........................................................................................................................................................................................................................27

Before You Get Started

What’s Included

The SeaLINK+485-DB9 (2107) is shipped with the following items. If any of these items is missing or

damaged, please contact Sealevel for replacement.

•Item# 2107 – USB to RS-485 Single Port Serial Interface Adapter

•Item# TB34 – DB9 Female to 5 Screw Terminals

Advisory Conventions

Warning

The highest level of importance used to stress a condition where damage could result to the

product, or the user could suffer serious injury.

Important

The middle level of importance used to highlight information that might not seem obvious or a

situation that could cause the product to fail.

Note

The lowest level of importance used to provide background information, additional tips, or other

non-critical facts that will not affect the use of the product.

Introduction

Overview

The Sealevel Systems SeaLINK+485-DB9 serial interface adapter provides the PC with a single USB to RS-

485 asynchronous serial port providing a versatile interface for common RS-485 needs. The SeaLINK+485

connects to a PC’s external USB port, so it does not require opening the computer case. Resources such

as IRQs and I/O addresses are also not utilized.

The SeaLINK® USB to RS-485 serial adapter utilizes Sealevel’s expertise in military-grade designs by

incorporating a ruggedized, overmolded enclosure design. This improves the reliability and durability in

industrial and mobile applications such as GPS navigation systems, barcode readers, signature input

devices, serial printers, scales, and similar applications.

The 2107 features programmable baud rate and data formats with 128-byte receive and 256-byte transmit

buffers. The USB serial adapter is compatible with all standard PC baud rates (300 baud and above) and

supports high-speed communication to 921.6K bps. The 2107 is powered by the USB port and status LEDs

molded into the enclosure indicate serial data activity and connection to the host.

The 2107 is specifically designed to be placed on either end of a two-wire half-duplex RS-485

communication link. It provides built in pull-up, pull-down, and terminating resistors that are required for

devices at the end of the link. It provides the required pull-up, pull-down, and terminating resistors required

for devices at the end of the link. Because the 2107 is designed to fully implement a two-wire half-duplex

RS-485 end point, it should not be placed in the middle of a RS-485 link. Because the 2107 is designed to

fully implement a RS-485 end point, it should not be placed in the middle of a RS-485 link.

Sealevel SeaCOM USB software drivers and utilities make installation and operation easy using Windows

and Linux operating systems. After installing the software, simply plug the 2107 into an available USB port

and the serial port is recognized as a standard COM port by the host system enabling compatibility with

legacy software.

The attached cable is 44 inches long and fully shielded to protect the 2107 from RF and EMI interference

that is common in mobile and industrial environments. Standard operating temperature range is -40° -

+75°C.

Features

•Compliant with RoHS and WEEE directives

•High-speed UART with 128-byte Rx FIFO and 256-

byte Tx FIFO

•Data rates from 300 bps to 921.6K bps

•Two-wire half duplex operation with built-in end of

link pull-up, pull-down, and terminating resistors

•Powered by USB connection

•DB9M connector

Optional Items

Depending upon your application, you are likely to find one

or more of the following items useful with the 2107. All items can be purchased from our website

(www.sealevel.com)by calling our sales team at (864) 843-4343.

Cables

Terminal Block - DB9 Female to 5 Screw Terminals (RS-422/485) (Part# TB34)

The TB34 terminal block adapter offers a simple solution for

connecting RS-422 and RS-485 field wiring to a serial port. The

terminal block is compatible with 2-wire and 4-wire RS-485

networks and matches the RS-422/485 pin-out on Sealevel

serial devices with DB9 male connectors. A pair of

thumbscrews secures the adapter to the serial port and

prevents accidental disconnection. The TB34 is compact and

allows multiple adapters to be used on multi-port serial

devices, such as Sealevel USB serial adapters, Ethernet serial

servers and other Sealevel serial devices with two or more

ports.

DB9F to DB25M (RS-485) Extension Cable (Part# CA177)

The CA177 is a standard AT-style RS-485 modem cable with a

DB9F connector on one end and a DB25M connector on the

other. This cable is 72 inches in length.

DB9F to DB9M Extension Cable (Part# CA127)

The CA127 allows users to extend a DB9 cable up to six feet.

The connectors are pinned one-to-one,

so the cable is

compatible with any device or cable that has DB9 connectors.

DB9 Female to 9 Screw Terminal (Part# TB05)

The TB05 terminal block breaks out a DB9 connector to 9 screw

terminals to simplify field wiring of serial connections. It is ideal

for RS-422 and RS-485 networks, yet it will work with any DB9

serial connection, including RS-232. The TB05 includes holes

for board or panel mounting. The TB05 is designed to connect

directly to Sealevel DB9 serial cards or any cable with a DB9M

connector.

Hubs

High Speed 4-Port USB 2.0 Hub with SeaLATCH USB Ports (Part# HUB4P)

The hub is USB 2.0 compliant, providing a full 480M bps data

rate to the host, and is backwards compatible with USB 1.1 and

1.0 devices. The HUB4P includes a wall-mount AC adapter that

supplies a full 500mA to each attached USB peripheral. The

power supply outputs 5VDC @ 2.4A and has a locking DC

connector to prevent accidental removal of the power cable.

High Speed 7-Port USB 2.0 Hub (Part# Hub 7P)

The HUB7P is USB 2.0 compliant, providing a full 480M bps data

rate to the host, and is backwards compatible with USB 1.1 and

1.0 devices. The powered hub includes a wall-

mount AC

adapter that supplies a full 500mA to each attached USB

peripheral. The power supply outputs 5VDC @ 4A and has a

locking DC connector to prevent accidental removal of the

power cable. The hub is housed in a rugged plastic enclosure

and status LEDs indicate external power, connection to the

host, and fault conditions.

Adapters and Converters

DB9F to RJ45 Modular Adapter (Item# RJ9S8)

The RJ9S8 is a DB9 female to RJ45 adapter. It can be

configured without tools and is an excellent choice for using

available infrastructure wiring.

DB9 Female to DB9 Male - Serial Surge Suppressor (Part# SS-DB9)

User configurable for use with male or female DB9 ports, the

SS-DB9 protects all 9 lines, plus D shell chassis. Convenient

DB9 input and output connects directly to the protected port,

obtaining a ground outlet from the computer chassis. Surge

suppression is handled with balanced arrays of high-speed

avalanche diodes that divert excess energies created by

electrostatic discharges, faulty wiring, or lightning away from

network interface connections.

Product Family

Whether you require one serial port or 16, SeaLINK USB serial adapters will have you quickly communicating

with RS-232, RS-422, and RS-485 peripherals. Unlike traditional UART-based devices, SeaLINK USB

products use a state-machine architecture that reduces host processor overhead for faster, more reliable

communications. Sealevel's SeaCOM software drivers and utilities make installation and operation easy

using Windows and Linux operating systems.

Part # Description

2105R USB to 1-Port RS-232 DB9 Serial Interface Adapter

2106 USB to 1-Port RS-422 DB9 Serial Interface Adapter

2107 USB to 1-Port RS-485 DB9 Serial Interface Adapter

2113 USB to 1-Port RS-232, RS-422, RS-485 DB9 Serial Interface Adapter

2123 USB to 1-Port RS-232, RS-422, RS-485 (Software Configurable) DB9 Serial Interface Adapter

2101 USB to 1-Port RS-232 DB25 Serial Interface Adapter

2102 USB to 1-Port RS 422, RS-485, RS-530 DB25 Serial Interface Adapter

2103 USB to 1-Port Isolated RS-232 DB25 Serial Interface Adapter

2104 USB to 1-Port RS 422, RS-485, RS-530 DB25 Serial Interface Adapter

2108 Embedded USB to 1-Port RS-232 DB9 Serial Interface Adapter with Low Profile PC Bracket

2128 Embedded USB to 1-Port RS-232, RS-422, RS-485 (Software Configurable) DB9 Serial

Interface Adapter with PC Bracket

2213 USB to 2-Port Isolated RS-232, RS-422, RS-485 DB9 Serial Interface Adapter

2223 USB to 2-Port RS-232, RS-422, RS-485 (Software Configurable) DB9 Serial Interface Adapter

2201 USB to 2-Port RS-232 DB9 Serial Interface Adapter

2202 USB to 2-Port RS-422, RS-485 DB9 Serial Interface Adapter

2203 USB to 2-Port RS-232, RS-422, RS-485 DB9 Serial Interface Adapter

2208 Embedded USB to 2-Port RS-232 DB9 Serial Interface Adapter with Standard Size PC

Bracket

2228 Embedded USB to 2-Port RS-232, RS-422, RS-485 (Software Configurable) DB9 Serial

Interface Adapter with PC Bracket

2401 USB to 4-Port RS-232 DB9 Serial Interface Adapter

2402 USB to 4-Port RS-422, RS-485 DB9 Serial Interface Adapter

2403 USB to 4-Port RS-232, RS-422, RS-485 DB9 Serial Interface Adapter

2404 USB to 4-Port RS-232 RJ45 Serial Interface Adapter

2407 USB to 4-Port RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter

2423 USB to 4-Port RS-232, RS-422, RS-485 (Software Configurable) DB9 Serial Interface Adapter

2433 USB to 4-Port RS-232, RS-422, RS-485 (Software Configurable) DB9 Serial Interface Adapter

641U USB to RS-232 RJ45 Serial Interface Adapter

647U USB to RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter

2801 USB to 8-Port RS-232 DB9 Serial Interface Adapter

2802 USB to 8-Port RS-422, RS-485 DB9 Serial Interface Adapter

2803 USB to 8-Port RS-232, RS-422, RS-485 DB9 Serial Interface Adapter

2804 USB to 8-Port RS-232 RJ45 Serial Interface Adapter

2807 USB to 8-Port RS-232, RS-485, RJ45 VersaCom Serial Interface Adapter

2823 USB to 8-Port RS-232, RS-422, RS-485 (Software Configurable) DB9 Serial Interface Adapter

2833 USB to 8-Port RS-232, RS-422, RS-485 DB9 Serial Interface Adapter

681U USB to RS-232 RJ45 Serial Interface Adapter

687U USB to RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter

2161 USB to 16-Port RS-232 RJ45 Serial Interface Adapter

2167 USB to 16-Port RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter

2108S Embedded USB to 1-Port RS-232 DB9 Serial Interface Adapter with Standard Size PC

Bracket

2123-OEM USB to 1-Port RS-232, RS-422, RS-485 (Software Configurable) DB9 Serial Interface Adapter

2223-KT USB to 2-Port RS-232, RS-422, RS-485 (Software Configurable) DB9 Serial Interface Adapter

2223-OEM USB to 2-Port RS-232, RS-422, RS-485 (Software Configurable) DB9 Serial Interface Adapter

641U-OEM USB to RS-232 RJ4 Serial Interface Adapter

647U-OEM USB to RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter

681U-OEM USB to RS-232 RJ45 Serial Interface Adapter

687U-OEM USB to RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter

2106-RoHS RoHS Compliant USB to 1-Port RS-422 DB9 Serial Interface Adapter

2102-RoHS RoHS Compliant USB to 1-Port RS-422, RS-485, RS-530 DB25 Serial Interface Adapter

2201-RoHS RoHS Compliant USB to 2-Port RS-232 DB9 Serial Interface Adapter

2203-RoHS RoHS Compliant USB to 2-Port RS-232, RS-422, RS-485 DB9 Serial Interface Adapter

2401-RoHS RoHS Compliant USB to 4-Port RS-232 DB9 Serial Interface Adapter

2403-RoHS RoHS Compliant USB to 4-Port RS-232, RS-422, RS-485 DB9 Serial Interface Adapter

2801-RoHS RoHS Compliant USB to 8-Port RS-232 DB9 Serial Interface Adapter

2404-RoHS RoHS Compliant USB to RS-232 RJ45 Serial Interface Adapter for Powering 5VDC Serial

Peripherals

2402-DC12 RoHS Compliant USB to RS-232 RJ45 Serial Interface Adapter for Powering 12VDC Serial

Peripherals

2404-DC24 USB to RS-232 RJ45 Serial Interface Adapter for Powering 24VDC Serial Peripherals

2407-DC05 USB to 4-Port RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter for Powering 5VDC

Serial Peripherals

2407-DC12 USB to 4-Port RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter for Powering 12VDC

Serial Peripherals

2407-DC24 USB to 4-Port RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter for Powering 24VDC

Serial Peripherals

2804-DC05 USB to 8-Port RS-232 RJ45 Serial Interface Adapter for Powering 5VDC Serial Peripherals

2804-DC12 USB to 8-Port RS-232 RJ45 Serial Interface Adapter for Powering 12VDC Serial Peripherals

2804-DC24 USB to 8-Port RS-232 RJ45 Serial Interface Adapter for Powering 24VDC Serial Peripherals

2807-DC05 USB to 8-Port RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter for Powering 5VDC

Serial Peripherals

2807-DC12 USB to 8-Port RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter for Powering 12VDC

Serial Peripherals

2807-DC24 USB to 8-Port RS-232, RS-485 RJ45 VersaCom Serial Interface Adapter for Powering 24VDC

Serial Peripherals

Electrical Specifications

The SeaLINK+485-DB9 utilizes a USB UART. This chip features programmable baud rate, data format, 128-

byte RX buffer, and 256-byte TX buffer. The RS-485 two-wire transceiver supports data rates from 300 baud

up to 921.6K baud. Refer to Appendix C for cable length limitations.

Connector Pin Out

RS-485 (DB-9 Male)

Note that pins 1 and 4 are internally connected and either may be used for the (+) wire in a two-wire

half duplex RS-485 link. Pins 2 and 3 are internally connected and either may be used for the (-) wire.

Note that pins 1 and 4 are internally pulled up to +5 volts though a 510-ohm resistor. Pins 2 and 3

are internally pulled down to ground through a 510-ohm resistor. The (+) and (-) pins are connected

together with a 120-ohm terminating resistor. This device should only be used at either end of a

RS-485 link.

Pin # Signal Name Mode

1 DATA+ Data Positive I/O

2 DATA- Data Negative I/O

3 DATA- Data Negative I/O

4 DATA+ Data Positive I/O

5 GND Ground

6 N/C Not Connected N/A

7 N/C Not Connected N/A

8 N/C Not Connected N/A

9 N/C Not Connected N/A

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