GearMo GM-FTDI4X User manual

gearmo.com
User Manual
4-Port RS-232 USB 2.0 Serial Adapter
w/ LED Indicators Model No. GM-FTDI4X

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Contents
- Summary ........................................................................................................................ 1
- Functions ........................................................................................................................ 1
- Hardware Installation & Application ............................................................ 1
- Performance Parameters .................................................................................... 2
- Connector & Signal .................................................................................................. 2
- Product Dimensions & Connection Diagram ........................................ 3
- USB to RS-232 Communication ....................................................................... 4
- Faults & Troubleshooting ..................................................................................... 4
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Summary
Functions
Hardware Installation & Application
The USB interface is gradually replacing the old-fashioned, low-speed peripheral
interfaces with the continuous development of the PC industry. Many vital devices in
current industrial environments are still designed using an RS-232 interface, so the USB to
RS-232 converters are needed to transfer data between PC and RS-232 devices.
GM-FTDI4X is a universal USB 4 port RS-232 converter which doesn’t need external
power supply and is compatible with USB and RS-232 standards. It can convert single-end
USB signal to RS-232 signal, and it has built-in automatic transmit-receive switch without
time delay. The unique I/O circuit can be used to automatically control the direction of
data ow so as to make it plug-and-play and applicable to all existing communication
software and interface hardware
GM-FTDI4X supports point-to-point communication with data rate of 300-921,600bps.
The power indicator and data trac indicator LED’s can be used for fault indication. USB
to RS-232 conversion is supported.
GM-FTDI4X interface converter supports the following communication mode:
1. Point-to-point communication mode.
Read the user manual carefully before installing the GM-FTDI4X interface converter. Put
the signal cable of the equipment into the USB socket. USB/DB9 male connectors are
adopted for input/output interface connection for this product.

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Performance Parameters
Connector & Signals
1. Standards: Conforming to USB V1.1, 1.0 and 2.0 and EIA RS-232.
2. USB signals: VCC, DATA+, DATA-, GND, FG
3. RS-232 signals: DCD, RXD, TXD, DTR, GND, DSR, RTS, CTS, RI
4. Working mode: Asynchronous point-to-point mode.
5. Direction control: Adoption of automatic data stream control for automatic recognition
and control of data transmission direction.
6. Baud rate: 300-921.6Kbps, automatically detection of the transmission rate of the serial
interface signal.
7. Transmission Distance: 5 Meters for RS-232 and less than 5 Meters for USB.
8. Interface Protection: +-15KV electrostatic protection.
9. Interface Forms: B interface female connector and DB9 male connector for USB.
10. Signal Indication: 9 indicator lights for Power (PWR), Send (TXD), and Receive (RXD).
11. Transmission media: twisted-pair cable or shielded cable.
12. Dimensions: 1500mm x 36mm x 16mm
13. Working environment: -40°C to 85°C, relative humidity of 5% to 95%
14. Supports Win98, 2000, 2003, 2008, XP, Vista, 7, 8, CE, Mac, Linux.
1. Pin assignment of RS-232C1. Pin assignment of RS-232C
1
2
3
4
5
6
7
8
9
Receive Data SIN (RXD)
Transmit Data SOUT (TXD)
Data Terminal Ready (DTR)
Signal Ground (GND)
Request to Send (RTS)
Clear to Send (CTS)
Ring Indicator (RI)
DB9M (PIN) RS-232C
Data Carrier Detect (DCD)
Data Set Ready (DSD)

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1. USB-A type: USB signal input and pin assignment
1. VCC
2. DATA-(DM)
3. DATA+(DP)
4. GND
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Product Dimension & Connection Diagram
1. Standard USB A-type male connector
2. Filter magnetic ring
3. Screened black standard USB 2.0 cable
4. Aesthetic shell (black)
5. Standard DB9 male connector
6. Master chip of FTDI company in England

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USB to RS-232 Communication
1. DCD 2,RXD 3, TXD 4, DTR 5, GND 6, DSR 7, RTS 8, CTS 9, RI
1. Data Communication Failure
a. Check the USB cable connection
b. Make sure that the RS-232 output interface connection is correct
c. Check the power supply
d. Check the wire terminal connection
e. Check receive indicator and see if it ashes
f. Check send indicator and see if it ashes
2. Data missing or incorrect
a. Check to see whether the data rate and format at both ends of the communication
equipment is consistent.
RS-232 Device RS-232 Device
Faults & Troubleshooting