USB to Serial Converters Manual
Version 2.0
Document Reference No.: CP_000032 Clearance No.: CP#022
Copyright © Connective Peripherals Pte Ltd
5
2
Specifications
2.1
Standard
Features
•
Internal Transmit and Receive buffers
•
Requires no IRQ, DMA, I/O port
•
DB-9 male serial connectors (terminal blocks on some models) (see Note 1)
•
LEDs for each port indicate TxD and RxD
•
Virtual COM port drivers available
o
Windows 7 up to Windows 10
o
MAC OSX 10.9 onwards
o
Linux K
ernel 3.0.0-19 (e.g.
(
Ubuntu version 11.10)
o
Other legacy drivers available from the FTDI website
USB to RS-232 Features (available on ES-U-1xxx and ES-U-30xx)
•
Adds RS-232 ports via USB connection
•
RS-232 data signals : DCD, RxD, TxD, DTR, GND, DSR, RTS, CTS, RI (See Note 2)
USB to RS-422/RS-485 Features (available on ES-U-20xx and ES-U-30xx) (See Note 3)
•
Adds RS-422 / RS-485 ports via USB connection
•
Auto transmit buffer control for 2-wire RS-485 half-duplex operation
•
Internal termination and bias resistors on some models (enabled by jumper)
•
RS-422 data signals : TX-, TX+, RX+, RX-, GND, RTS-, RTS+, CTS+, CTS- (see Note 2)
•
RS-485 signals (half duplex) : Data+, Data-, GND
•
RS-485 signals (full-duplex) : TX-, TX+, RX-, RX+, GND
Additional Opto-isolation Features (available on ES-U-11xx and ES-U-21xx)
•
Each RS-232 or RS-422/RS-485 port is individually isolated with 2000 volt DC optical isolation
•
Each RS-232 or RS-422/RS-485 port is individually protected by a surge protector to withstand
electrostatic discharge and power surges up to 25KV ESD
Note 1 ES-U-1032-RM has RJ45 ports which can be converted to DB-9 male if required using the supplied cables
Note 2 Terminal block has subset of these signals only
–
see section 6 for details
ES-U-2101-MB also features RS232 but only a subset of these signals
–
see section 6 for details
Note 3 Support multiple serial protocols - Jumpers or DIP switches are used to select the required serial protocol
