Gearmo GM-1015-B Optoelectronic Isolator User Manual

: June 5, 2024
: Gearmo

Table of Contents

Gearmo GM-1015-B Optoelectronic Isolator
Overview
Feature
Connector and signal
Model choosing
Application
Connection
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Gearmo GM-1015-B Optoelectronic Isolator

Overview

GM-1015-B is an optoelectronic isolator. It adopts advanced optoelectronic isolation technology, this greatly protects R-232 serial devices from ground loop circuit, surge, lightning, ESD, and hot plug damage. 90% damage reasons of RS-23 2 port are on ground loop circuit, surge, lightning, ESD, and hot plug, electromagnetic interference, etc. Such as device A connects with device B via RS-232, if the voltage difference of ground wire between A & B is over 50V (normally will be over 80V), the RS-232 communication will be abnormal, RS-232 ports will raise 2,500Vrms in sudden, and continuous 500VDC submit value difference. GM-1015-B can absorb ESD and electromagnetic interference, so as to protect RS-232 ports from the devices. The optoelectronic technology makes GM-1015-B fully isolated the loop between electric and ground of both RS-232 ports; it changes the electrical signal into optic signal from one side, and transmits it to another side, then converts to electrical signal. This can protect the communication devices from ground loop and surge interference, which greatly improve the stability and reliability of the communication system. GM-1015-B is widely used in the field of power, insurance, telecom, railway, post office, finance, bank, and stock market, etc, applications such as point to point RS-232 communication system, UNIX multi-user system, monitoring con trol system, switch toll system, satellite receiver, ATM, etc.

Feature

Standards: RS-232 EIA & CCITTV.24 asynchronous protocol
Connector: Two DB9 on both sides
Transmission Mode: Asynchronous, full-duplex, full transparent
Isolated Voltage: 2,500Vrms impulse or 500VDC
Baudrate: 300bps-19,200bps
Power: From RS-232(TXD, RTS or DTR)
Dimension: 63mm x 33mm x 17mm
Weight: 30g
Operating Temperature: -40 to 85
Relative Humidity: 5% to 95%

Connector and signal

RS-232C DTE pin assignment

DB9 Female (PIN)	RS-232C Signal
1	N/C
2	SOUT (TXD)
3	SIN (RXD)
4	DSR
5	GND
6	DTR
7	CTS
8	RTS
9	N/C

DB9 male (PIN)	RS-232C Signal
1	N/C
2	SIN (RXD)
3	SOUT (TXD)
4	DTR
5	GND
6	DSR
7	RTS
8	CTS
9	N/C

Model choosing

Connection
GM-1015-B is allowed to connect between RS-232 connecting cable and RS-232 ports of the device at any sides (pay attention to: TO DTE and TO DCE direction). Generally speaking, PC and multi-user belong to DTE device; MODEM, terminal belong to DCE device. The final way to distinguish DTE or DCE device should be based on the RS-232 pin signals. So if two DTE devices (such like terminal and multi-user) are crossing via cross RS-232 cable, when using GM-1015-B, no matter it is on which side, terminal device should be connected on TO DTE side, cable should be on TO DCE side.