Elo TouchSystems E218 Operation Manual

USB – RS-485 Communication adapter

- virtual serial port

ELO E218

Operation manual

ELOE218ZK002

2

1.0 Introduction.................................................................................3

1.1 Use of the adapter........................................................................3

2.0 Operation principles....................................................................3

3.0 Installation..................................................................................3

3.1 USB interface connection............................................................3

3.2 RS-485 Installing.........................................................................3

3.2.1 VW3A8E214 version.................................................................4

3.3 Installing driver...........................................................................4

3.3.1 Installing virtual port under Windows XP................................4

3.3.2 Uninstalling virtual port under Windows XP...........................5

3.3.3 Virtual port properties setting...................................................6

4.0 Specification................................................................................6

4.1 Parameters...................................................................................6

4.2 Other............................................................................................6

5.0 Testing.........................................................................................7

6.0 Troubleshooting...........................................................................7

7.0 Ordering information..................................................................7

ELOE218ZK002

3

1.0 Introduction

The USB interface is preferred to the COM port with RS-232 interface in personal
computer technology. To connect the peripheral devices of the RS-232 interface, the
USB/RS-232 adapters along with the driver are applied to create so-called virtual
COM on the PC.
ELO E218 is a device which converts virtual COM to the asynchronous line of the
symmetric signal via the USB interface. The signals transmission to the half-duplex
RS-485 interface allows the range, communication partners´ number and the
transmission interference immunity to increase.

1.1 Use of the adapter

he converter increases transmission immunity against electrical disturbance hence it is
intended to be used in the environments where lightning over-voltage is not necessary
to be considered. The adapter allows the transmission rate up to 1 Mbps. This
maximum attainable rate decreases due to the line length and/or its impedance growth.
Recommended maximum line length is 1200 m at the rate of 9600 bps.

2.0 Operation principles

The adapter E218 converts the RS-485
interface to the USB interface, transmits
TxD and RxD signals. The transmission is
half-duplex that means switching on the RS­485 transmitter only during its own
transmitting to allow other communication
partners (max.32) to transmit. The RS-485
transmitter is automatically controlled.
There are two LED indicators - READY and
DATA. READY indicates that drivers are installed correctly, DATA indicates that
data are transmitted (red) or received (green) over RS-485.
Adapter is supplied from USB port

3.0 Installation

E218 adapter installation is described in this part. There are two problems to be
solved: the hardware installation and the SW driver installation.

3.1 USB interface connection

The adapter operates as per specification USB 2.0 full-speed (12 Mbps). The USB
adapter connector is of A male type.

3.2 RS-485 Installing

Model ELO E218 can be supplied with various RS485 connectors.