UNI-T UT-501 User Manual

UT-501/502
RS-422/RS-485 Photoelectric Isolation
Data Repeater
User's Manual
I、General introduction:
U T 5 0 1 - data repeater is a kind of data relay
communication product of photoelectric isolated
RS-422/RS-485. It can be used with ATC-108
Photoelectric Isolation Interface
combination. UT-501 data repeater can prolong the
communication distance of RS-422/RS-485 bus
network and increase the number of RS-422/RS-485
bus network devices. The inner circuit of ATC-109N
Photoelectric Isolation Data Repeater can detect data
direction and switch to control it automatically,
conveniently to form a RS-485 network without any
shake hand signal. This kind of RS-485 control is
fully transparent and need not amend software for the
former network basing on RS-422/485 working
modes. The built in photoelectric isolator and DC/DC
converter can offer 3500V isolation voltage and the
rapid Transient Voltage Suppressor (TVS) can
effectively inhibit lightning and ESD, provide 1000W
lightning strike and surge protection power on each
line, and prevent lightning strike and common code
interference.
II、Performance parameter
1. Interface feature: interface is compatible with
EIA/TIA RS-485/RS-422 standard
2. Electric interface: RS-422/RS-485 interfaces are
DB9 interfaces
3. Transmission media: twisted-pair cable or shielded
cable
4. Working mode: asynchronous half or full duplex
5. Signal indication: 3 signal indication lights indicate
TXD, RXD and PWR
6. Isolation: isolation voltage 3500VRMS 500VDC
sequence
7. Transmission speed: 115.2K BPS to 1.2KM
8. Protecting grade: RS-422, RS-485 interface 1000W
lightning strike and surge protection on each line
9. Extended distance: 0-5 kilometers
Converter in
(115200-9600BPS)
10. Size: 125mmx54mmx25mm
11. Working environment: -25℃ to 70℃,
95% relative humidity
III. Circuit function block diagram:
38.4K BPS to 2.4KM
9600 BPS to 5KM
5% to
IV.Connector and signal
RS-422/485 Pinout: (6-bit terminal from the left to right) )
Terminal
1 2 3 4
No
RS-422 T+ T- R+ R-
RS-485 485+ 485- - -
V. Installation setup and application:
Please read the User's Manual carefully before
installing U T - 5 0 1 Photoelectric Isolation Data
Repeater. Connect the product's power converter with
+9V socket. The Termnal pin shall be connected with
RS-422 or RS-485 network equipments according to
definition instruction.
U T - 5 0 1 Photoelectric Isolation Data Repeater
supports following 3 relay communication modes:
1. RS-422/ 4 wire full duplex relay
2. RS-485/ dual-line half duplex
3. 4 wire RS-485 to 2 wire RS-485 relay
RS-422 to RS-422 relay: .
RS-485 to RS-485 relay:
4 wire RS-485 to 2 wire RS-485 relay:
VI. Sketch map for communication connection
1. RS-422 4 wire full duplex data relay
2. RS-485 dual-line half duplex data relay
5 6
VIN GND
VIN GND