Korenix JetCon 2201-w User manual



 
 


Introduction
The standard RS-232 protocol has been widely used in most of industrial computer
systems for serial port communication. However, it has its limitations in transmission
speed, range, and networking capabilities. On the other hand, the RS-422 and RS-485
standard has overcome the limitations mentioned above by utilizing different voltage
lines for data and control signals. Therefore, the RS-232 to RS-422/485 converter is
commonly deployed to the industrial serial communication network for more distance
and reliability.
Product Features
 Automatic RS-232 to RS-422/485 converter
 Auto Baud rate and direction control
 High Speed 921.6Kbps
 3000V RS-485/422 isolation protection
 RX biasing and line terminator selection
 Easy Configure without power resetting
 -40~70oC wide operating temperature
System Dimension
74mm (W) x 24.7mm(H) x 99mm (D)
RS-232 to RS-422/485 Converter
2201i
PWR
TX
RX
DIP Switch RS-232
TX+ TX- RX+ RX- DATA+ DATA- S.GND V+ V-
RS-422/485-4w RS-485-2w 12-48V
Package Checklist
The JetCon 2201 series are
shipping with the following items:
 JetCon 2201 x1
 Quick Installation Guide x1
 DIN rail mount kits x1
V1.0
V1.0
JetCon 2201-w / JetCon 2201-iw
www.korenix.comv 1.0
Quick Installation Guide
Industrial RS-232 to RS-422/485 serial converter

System Installation
1. Mounting the Unit – DIN Rail
Din-Rail mount: screw up the DIN rail mount kit with 4 screws and mount
JetCon 2201 on the DIN Rail.
Insert the flat screw
driver into the bottom
of clip to loosen the
clip from the track
2. Mounting the Unit – Wall mount
Pull down after screw-up the screws to
Lock on the wall
RS-232 to RS-422/485 Converter
2201i
PWR
TX
RX
DIP Switch RS-232
TX+ TX- RX+ RX- DATA+ DATA- S.GND V+ V-
RS-422/485-4w RS-485-2w 12-48V
+ + Wall Mount Screw
3.5mm
7.00mm
3. Powering the Device
There is one earth grounding pole included in the power-input connector. Connect the earth
grounding of JetCon 2201 to ensure the system safety and prevent noise to obtain better
communication quality.
The standard DC power input is DC 24V with polarity reverse protection, the input voltage range
from 12V to 48V. Before install the power, please ensure the Switch power supply is UL certified
and the AC power source is turn-off.

RS-232 to RS-422/485 Converter
2201i
PWR
TX
RX
DIP Switch RS-232
TX+ TX- RX+ RX- DATA+ DATA- S.GND V+ V-
RS-422/485-4w RS-485-2w 12-48V
Power Input Range
DC 12V~48V
Earth Ground
Output Voltage: DC 24V/1A
AC Input
Switching Power Supply
UL Certified
V- V+
4.1 Connect to PC/PLC RS-232 interface
Some of RS-232 conductors of PC/PLC site need
short to provide handshaking feedback mechanism
as the connection figure.
4. Connecting the serial interface
JetCon 2201 supports RS-232 converts to RS-422, RS-485 4-wire and 2-wire. The
RS-232 supports Female DB-9 connector and RS-422/485 is removable terminal block.
Definition of RS-232 pin-out (DB-9)
Abbreviation
CD
TD
RD
DTR
S.G.
DSR
RTS
CTS
RI
1
2
3
4
5
6
7
8
9
Full Name
Carrier Detect
Transmit Data
Receive Data
Data Terminal Ready
Signal Ground
Data Send Ready
Request To Send
Clear To Send
Ring Indicator
Pin No.
54321
9876

4.2 RS-422/485 configuration
The JetCon 2201-w/2201-iw provides one 5-pin DIP-switch to select the RS-422/485 mode
and also provides 120 ohm line terminator selection. The configuration of DIP-switch shows
as following table. Be sure the DIP-switch is configured as right mode before make the
RS-422 or RS-485 connection.
In an idled multi-drop RS-485 network, all nodes are in listen (receive) mode. Under this
condition there are no active drivers on the network. All drivers are tri-stated. Without anything
driving the network, the state of the line is unknown. The JetCon 2201 provides biasing
resistor select function to offer and keep 200 mV at the RX+ and RX-. If the network node up
to 32, the first or last node need turn-on the Biasing resistor to keep the last bit state at RX+/- .
The 120Ω terminator is used to match the line impendence, when the line impendence is
mismatched, the transmitted signal is not absorbed and a portion is reflected back to the
transmission line and interference the communication. Also, the terminator only applies at first
and last node in a multi-drop RS-485 network.
Description
RS-422
RS-485 4-wire
RS-485 2-wire
RX +/- Terminator (120Ω)
RX+/- Biasing (150KΩ)
RX+/- Biasing (1KΩ)
SW1
Off
On
On
X
X
X
SW2
Off
Off
On
X
X
X
SW3
X
X
X
On
X
X
SW4
X
X
X
X
Off
On
SW5
X
X
X
X
Off
On 1
ON
2345
4.3 Connecting RS-422 and RS-485
The JetCon 2201 supports one 7-pin removable terminal block for RS-422/RS-485 2-wire and
4-wire communication.
In the following diagram shows the wiring architecture of RS-422, RS-485 2/4-wire.
The RS-485 support 2/4-wire master-slave communication mode, the master-slave type
architecture has one node that issues commends to each slave node and process the
responses that from slave. Slave node won’t transmit data without request from master node.
In the multi-drop serial network, each slave should have its own unique address.