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1xRS232/422/485 Industrial Ethernet to Serial

Serial Port

Ports

Software Selectable as RS232, RS422/485 Full Duplex, or RS485 Half Duplex

Port Settings - Software Selectable as RS232, RS422/485 Full Duplex, or RS485 Half Duplex

Baud Rate

Any custom Baud rate between 60 - 1,000,000 (1 MegaBaud) can be selected

Data Bits

5,6,7 or 8

Parity

Odd, Even, None, Mark or Space

Stop Bits

1, 1.5 or 2

Flow Control

RTS/CTS, DSR/DTR, XON/XOFF

Tx/Rx Modes

RS232 Standard: RS232 allows point to point communication between 2 devices.

RS422 Standard: RS422 allows one transmitter and up to 10 receivers with data transmitter rates up

to 10 megabits per second for distances up to 40 feet and up to 100 Kilobits per second for distances

up to 4,000 feet (1219 metres). To achieve good long distance noise immunity, 2 wires are used to

carry each signal, configured as a twisted pair of cables. The TXD pair and RXD pair are used to carry

the data whilst the RTS pair and CTS pair lines are used for handshaking. Thus 2 twisted pairs are

used without handshaking and 4 twisted pair cable is used with handshaking both these schemes

allow full duplex data communications.

RS485 Standard: RS485, based on the RS422 standard allows up to 32 driver/receivers pairs on a

standard load or 128 low load devices per port can be connected. Whilst only one of these should

be transmitting data at any time, the rest can all simultaneously listen to the data. Handshaking is

performed by software protocol. Two twisted pairs form a full duplex system. Often only one twisted

pair cable is used as the TXD and RXD lines are tied together; this is known as half duplex mode.

Brainboxes RS422/485 products implement a state of the art hardware autogating circuit ensuring

error free communications in half duplex configurations.

Industrial Ethernet to Serial RS485: recievers are 1/8th load allowing upto 256 nodes on the bus. Fail

safe open circuit and short circuit protection, protects the Industrial Ethernet to Serial against wiring

faults.

Line Terminating Resistor: On board RS485 line termination resistor can be enabled by a user

selectable jumper. The RS422/485 line terminating resister prevents signal reflections when the ES

device is at the end of transmission line.

Bias Resistors: On board RS485 Half Duplex fail safe bias resistors enabled by user selectable jumpers.

The fail safe biasing resistors pull the line to a known good state during idle times preventing phantom

character detection.

Power Supply

Power Supply input

Redundant DC Dual Power Inputs, reverse polarity protected +5 VDC to +30VDC

Power Consumption 1.6 Watt typical 60mA@24V - 2.9 Watt Max

Ethernet

Ethernet Port

1 x RJ45 jack, 10/100Mhz autosensing, crossover auto sensing (Auto MDIX)

Data Rate

10/100 Mega bits/second

Cabling

Normal / AUTO MDI/MDIX and IEEE Auto crossover support

Industrial Ethernet to Serial

ES-511