Uotek UT-501-EN User Manual

UT-501-EN
Industrial RS-232 to RS-485/422
Port-powered Opto-isolated Converter
User Manual
. Overview
UT-501-EN industrial grade port-powered opto-isolated interface
converter, compatible with RS-232C, RS-422, RS-485 standards,
capable of converting single-port RS-232 signals to balanced
differential RS-422 or RS-485 signals, with built-in opto-isolator,
capable of providing up to 2500Vrms isolation voltage, with
fast transient voltage suppression protector. This protector is
designed to protect the RS-422/RS-485 interface with today's
advanced TVS (TRANSIENT VOLTAGE SUPPRESSOR) transient
voltage suppressor. Under normal conditions, the TVS tube is
highly resistive, and when the two ends of the TVS tube are subjected
to an instantaneous high-energy shock, it can reduce the impedance
of its two ends at a very high rate, absorbing a large The voltage
at both ends is clamped at a predetermined value to protect the
circuit components behind from damage due to transient high-
voltage shock. This protector can effectively suppress lightning
(LIGHTNING) and ESD, providing 600W of lightning surge
protection power per line, as well as surge voltages and transient
over-voltages generated by various causes on the line, and the
extremely small inter-pole capacitance ensures high-speed
transmission of the RS-422/RS-485 interface. The RS-232 interface
end is connected to the compatible RS-232C standard interface
through a DB9 female connector, and the RS-422 and RS-485
ends are the outputs through the ten-position terminal block.
The converter is equipped with zero-latency automatic transceiver,
unique I/O circuitry automatically controls the data flow direction
without any handshaking signal (such as RTS, DTR, etc.), and
no jumper setting is required to achieve full-duplex (RS-422)
and half-duplex (RS-485) mode conversion, plug-and-play.
Ensure that it is suitable for all existing communication software
and interface hardware, no need to make any software modification
to the previous RS-232 based working mode.
UT-501-EN industrial grade port-powered opto-isolated interface
converter can provide reliable connection for point-to-point
and point-to-multipoint communication, point-to-multipoint
allows 32 RS-422 or RS-485 interface devices per converter,
with data communication rate 300-115.2Kbps, with power
indicator and data flow indicator to indicate the fault situation,
support communication mode RS-232 to RS-422, RS-232 to
RS-485 conversion.
1
.Performance Parameter
Interface characteristics: interface compatible with EIA/TIA
RS-232C, RS-485/RS-422 standard
Electrical interface: RS-232 interface input DB9 female connector,
RS-422/RS-485 interface ten terminal blocks for the output
Protection level: RS-232 interface +/-15KV ESD protection, RS-422,
RS-485 interface 600W per port of lightning surge protection.
Isolation: isolation voltage 2500Vrms 500DC continuous
Working mode: asynchronous half-duplex or asynchronous full-duplex
Signal indication: three signal indicators power (PWR), transmit (TXD),
receive (RXD)
Transmission medium: twisted pair or shielded wire
Transmission rate: 115.2Kbps to 300M
38.4Kbps to 600M
9600 BPS to 1.2KM
Dimension: 117mm 80mm×25mm
Operating temperature: -25 ~ 70
Relative humidity: 5 ~ 95%
Transmission distance: 0-1200m (115200bps-9600bps)
. Performance Parameter
DB 9 Female
RS-232C Interface signal
(PIN)
1 GND
2 Receive data SIN (RXD)
3 Transmit data SOUT (TXD)
4 DTR
5 GND
6 DSR
7 RTS
8
CTS
9
RI
RS-485/RS-422 output signal and terminal pin assignment
Terminal
Output RS-422
block
signal RS-422 full-duplex wiring
(PIN)
T/R+ Transmit (A+)
1
Transmit (B-)
2 T/R-
RXD+ Receive (A+)
3
RXD- Receive (B-)
4
GND GND
5
/
N/A
6
/
7 N/A
N/A /
8
/
9 VCC
GND GND
10
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. Hardware Installation and Application
Please read the user manual before installing UT-501 port-powered
opto-isolated interface converter, connect the communication cable to
the RS-232 port and the corresponding power supply to the power port.
T/R+T/R- represents transmitting and receiving A+/B-, RXD+/ RXD-
represents receiving A+/B-, VCC represents input or output power,
GND represents common ground, point-to-point, point-to-multipoint,
half-duplex communication connects two wires T/R+, T/R-, point-to-
point, point-to-multipoint, full-duplex communication connects 4 wires
T/R+, T /R-, RXD+, RXD-.
UT-501 port-powered Interface Converter supports the following 4
communication methods:
1. Point-to-point/four-wire full duplex
2. Point-to-multipoint/four-wire full duplex
3. Point-to-point/two-wire half-duplex
4. Point-to-multipoint/two-wire half-duplex
When the converter is wired as full duplex or half duplex, a matching
resistor (120 Ohm 1/4W) needs to be connected at the end of the line in
order to prevent signal reflection and interference
. Communication connection diagram
RS-232 to RS-422 conversion
1.RS-422 point-to-point 4-line full duplex communication
RS-485
half-duplex wiring
RS-485(A+)
RS-485(B-)
/
/
GND
/
/
/
/
GND
UT-501-EN RS-422 Device
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