UTEK UT-2204 Instruction Manual

UT-2204 4-port RS-485 Smart Data Converter
Instruction Manual

Overview

UT-2204 is a RS-485 bus split hub designed for RS-485 system
used in dema nding envir onments. It supports a data communication
rate up to 115.2KBPS and has data buffers and microprocessors. It
uses external switching power supply for safety and reliability and is
ideal for engineering applications.
The built-in discrimination circuit can automatically sense the
direction of data flow and switch the enable control circuit to ensure
the switch of transmit and receive in RS-485 mode. The communication
distance of RS-485 can exceed 1200m for stable performance, so it's
widely used in applications such as video supervision system as a
high-performance data interface converter.
UT-2204 RS-485 HUB provides star-type RS-485 bus connection.
Users can im prove the RS -485 bus structure and split bus segments
conveniently to improve the communication reliability. This feature
significantly improves the reliability of existing RS-485 network and
reduces maintenance interval. Reasonable use of UT-2204 RS-485HUB
can help to design a unique, highly reliable RS-485 system.

Features

1. Interface: Compatible with RS-232 and RS-485 standards of EIA/TIA
2. Electric connection: DB9/F socket for RS-232C interface, wiring
terminal for RS-485 end
1 1
3. Transmission media: twisted-pair cable or shielded cable
4. Operation mode: Asynchronous half-duplex
5. Signal indicator: 9 signal LEDs: power (PWR), transmit(TXD1),
(TXD2), receive (RXD1),(RXD2) and error (E1-E4)
6. Data rate: 1200BPS-115.2KBPS
7. Protection class: 15KVESD protection;1500W lightning surge
protection for RS-485 interface
8. Transfer distance: 0-1.2 Kilometers (115200-1200BPS)
9. Power supply: DC9-30V 1A
10. Dimension 210mm 140mm 32mm
11. Working environment: -40 to 85 ,relative humidity of
5% to 95%

Panel and signal indication

There are 9 indicator lights on the front panel of UT-2204.
Wiring terminal and socket are on the rear panel. RS-232 Setup
port is used for baud rate setting (please refer to the software
instruction manual), SIGNAL OUT is alarm relay output, DC9-30
is the power input socket and wiring terminal, RS-485INPUT and
RS-485OUTPUT are data communication ports.
4-port RS-485 Smart Data Converter
PWR TX2 TX1 E2 E4
RX2 RX1 E1 E3
Figure 1 Front panel view of UT-2204
RS-232 Setup
5
9 6
RS-485 OUTPUT RS-485 INPUT
Figure 2 Rear panel view of UT-2204
2 2

Explanations of indicator lights on the front panel of UT-2204

PWR power indicator, normally red
TX data transmitting indicator, normally flashing green,
indicating that the data is transmitted from RS-485 Output
1-4 to RS-485 Input 1-2ports
RX data receiving indicator, normally flashing yellow, indicating
that the data is transmitted from RS-485 Input1-2 to RS-485 Output
1-4 ports
E1-E4
ON then the RS-485 interface devices connected to port1-port4
are short-circuited or reverse connected, and E1 corresponds to
port 1, and E4 corresponds to port 4, and at the same time alarm
relay will operate and the normally open contacts will be closed.
Users can determine the failed port and the connected faulty device
according to the state of these error alarm indicators.

Electric interface and its definition

RS-232C
Figure 3 RS-232 interface
1 RS-232C interface definition
DB9 Female
(PIN)
Model:UT-2204
DC9-30V
SIGNAL OUT
+
NO NC COM
2 RS-485
1
Wiring terminals
error alarm indicator for port1-port4; If it always turns
interface definition RS-485 interface definition
RS-485+ RS-485- GND
5 1
9 6
Figure 4 RS-485 interface
RS-232C Interface signals
Protective earth SIN (RXD)
1
Transmit data SOUT(TXD)
2
3 Receive data SIN(RXD)
4 Empty
5 Signal ground GND
6 Empty
7 Empty
8 Empty
9 Transmit data
interface definition
Description
D x +
485+
D x -
485-
GND
GND
Note: X can be 1, 2, 3 or 4
3 3