Document Reference No.: FT_000151
DS_US232R-10(R-100/500) USB TO RS232 ADAPTER CABLE Data Sheet
Version 1.11
Clearance No.: #99
Connections
3.3 External Connectors
3.3.1 USB
The USB-F-1001 is a downstream USB 2.0 Device. A standard USB Series “A” connector is mounted
inside the USB-F-1001 to facilitate connection to an upstream USB Host or Hub.
Pin Number
Pin Type
Description
1
Power
VBUS – USB Power provided from upstream USB Host or Hub
D– = USB data signal, negative polarity
D+ = USB data signal, positive polarity
GND = USB signal ground
Bidirectional
Bidirectional
Ground
2
3
4
Shield
Case Ground
Drain = typically connected to the host PC case
Table 3.1 USB "A" Connector Pin-Out
3.3.2 RS232
The RS232 port is configured as Data Terminal Equipment (DTE), with a 9-contact D-Sub Pin connector.
Pin assignments are according to TIA/EIA-574 which formally defines the assignments for a COM port
found on many personal computers.
Pin Number
Pin Type
Description
1
Input
Input
DCD = Data Carrier Detect
RXD = Receive Data
2
3
Output
TXD = Transmit Data
4
Output
DTR = Data Terminal Ready
GND = RS232 signal ground
DSR = Data Set Ready
5
Ground
Input
6
7
Output
RTS = Request To Send
CTS = Clear To Send
8
9
Input
Input / Power
Case Ground
RI = Ring Indicator
Shield
Drain = typically connected to the host PC case
Table 3.2 DE-9P RS232 Pin-Out
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