Digitus DA-70163 User Manual

RS-232 SERIAL INTERFACE

PHOTOELECTRIC ISOLATOR

User Manual

DA-70163

I. Summary

With adoption of advanced photoelectric isolation technology, RS-232 Serial Interface

Photoelectric Isolator, also named Serial Isolator, can offer best protection for RS-232 serial

interface devices with elimination of damages possibly caused up by grounding

loop voltage, surge, lighting induction, hot plug, etc.

Normally, RS-232 damages are hardware damages of communication devices, for which

more than 90% of the reasons are bad circumstances including non-grounding at both ends

of the devices, several surges, lighting induction, static interference, hot plug,

electromagnetic interference, etc. For example, if device A is connected to device B with

RS-232 interface, when there is a voltage margin of above 50V between their grounding

wires, the communication will gets unstable. RS-232 Serial Interface Photoelectric Isolator

can tolerate a peak voltage margin of transient 2,500 Vrms for 500VDC on a continuous

base, and at the same time, it is able to absorb static and electromagnetic interference for

protection of RS-232 devices.

As the electric and grounding loop between the two ends of RS-232 devices are completely

blocked by the advanced isolation technology adopted by us, therefore, the electric signal

from one end has been turned into optical signal for transmission to the other end, and the

optical received by the other end will be converted back into electric signal again. In this

way, the communication devices are well protected from the interference and damages

possibly caused by power grounding loop or surge, therefore, obvious improvement of the

reliability and stability of the communication system are achieved.

Our products are now being widely used in the applications of point-to-point RS-232

communication system, UNIX multi-user system, monitor control system, program control

exchanger charging terminal, satellite receiver, ATM etc for the industries of electricity,

insurance, telecommunications, railway, post office, financial, banking, securities, program

controlling, etc.