Hexin Technology HXSP-2108C Industrial Level RS-232 to RS-485/RS-422 Converter User Manual
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Problem analysis：
1. Data communication unsuccessful
A. Check RS-232 interfaces whether to be correct;
B. Check RS-485 interfaces whether to be correct;
C. Check whether RS-232 signal level（TXD、DTR、RTS） lower than＋5V,
if that, it can get through power from 6
th
pin of DB9 Male.
2. Data missing or messy code
A. Check whether the baud rate and format of both sides of data
communication equipment are same.
B. If possible, add the matched resistance on the terminal circuit (120 Ω,1/4
w)
B. RS-232/RS-422 communicate as point to point s four wire, asynchronous,
full-duplex method, this method is mainly used for con trol-side equipment
connector is RS-232, and the connector of equipment un der control is
RS-422,and it will connect many RS -422 devices. From device (RS -422
SLAVE) MAX connection is 32~128 RS -422 devices. In order to avoid signal
reflex and interfering signal, it should be add the matched resistance on the
terminal circuit (120Ω, 1/4 w)
(2) When the HXSP-2108C connects as RS-232/RS-4485, the device
connects as RS-485 connection method.
A. RS-232/RS-485 communicate as point to point two wire , half-duplex
method, this method is mainly used for control -side equipment connector is
RS-232, and the connector of equipment un der control is RS-485, The two
side can not communicate directly because of disaccord of two side electrical
specialty, HXSP-2108C converter can be used for transparent change the
RS-232 signals to RS-485 signals, and it need not RTS.
B. RS-232/RS-485 communicate as point to points two wire , half-duplex
method, this method is mainly used for control -side equipment connector is
RS-232, and the connector of equipment un der control is RS-485,and it will
connect many RS-485 devices. From device (RS -485 SLAVE) MAX
connection is 32~128 RS-485 devices. In order to avoid signal reflex and
interfering signal, it should be add the matched resistance on the terminal
circuit (120Ω, 1/4 w)
Power Supply and Surge Protection
1. HXSP-2108C converter can get the power from the 9V adapter or from other
DC power or device. Power supply voltage should be +9V, electric should be
100mA.
2 . Surging protection
Ordinary interface converters do not provide large energy protection
equipment, and they try to release the energy to the Earth through the smallest
resistance route for the transient high voltage in the interface data line of wire
sensor. So it is easy to make the interface component’s damage. Interface
Converters during the process should avoid grounding vacant in order to
ensure the safety of use and reliable communi cations.