EX-9531
Isolated USB to RS-485 & 422(TX,RX,RTS,CTS) Converter
Introduction
The EX-9531 convert is an intelligent, stackable expansion module that connects to a PC USB port or USB Hub via
the Universal Serial Bus(USB) port, providing one High-Speed RS-422 or RS-485 serial port(jumperless) The
EX-9531 features easy connectivity for traditional serial devices.
The RS-232 standard supports full-duplex communication and handshaking signals (such as RTS, CTS) and The
RS-485 control is completely transparent to the user and software written for half-duplex COM works without any
modification.
The EX-9531's Opto-isolators provide 3000 Vdc of isolation to protect the host computer from ground loops and
destructive voltage spikes on the RS-422/485 data lines.
EX-9531 also offer internal surge-protection on their data lines. Internal high-speed transient suppressors on each
data line protect the modules from dangerous voltages levels or spikes.
The EX-9531 module derives the power from USB port and doesn’t need any power adapter.
Features
USB Specification 1.1 Compliant
Auto direction flow control on RS-485
Full-Duplex RS-422 support
RS-422 support RTS & CTS handshake signals
Minimum 3000 VDC isolation protection
Transient suppression on RS-485 data lines
Auto switching for USB to RS-422 or RS-485(jumperless)
Auto Switching Baud Rate up to 115.2 Kbps
Reserved space for termination resistors R1(TX/DATA), R2(RX), R3(CTS), R4(RTS)
Power and data flow indicator for troubleshooting
Driver support for Windows 95/98/ME/2000/XP, Linux
Power requirement: Self Power
Mounts easily on DIN-rail or panel
Specifications:
USB Controller: Compatibility USB Specification 1.1 Standard
USB interface connector: USB type B
Isolation Side: RS-422/485
Converted signals: RS-422 or RS-485 Auto switching(jumperless)
Handshakel: RS422 support RTS & CTS handshake signals
Auto Switching Baud rate (bps):300 ~115.2 K BPS
Transmission and Receiving LED indicator
Isolation voltage: 3000 V DC
RS-422/RS-485 connector: plug-in screw terminal
Accessories (Supplied):NYLON DIN-rail Mounting Adapter SECC Panel Mounting Bracket
Plug-in screw terminal wiring: Accepts AWG 1-#12 to #22 (0.5 to 2.5 mm) wires
Power requirement: USB bus power
Case: ABS with captive mounting hardware
Power consumption: 0.65 W
Operating temperature:0 ~ 70 °C (32 ~ 158 °F)
Storage temperature:-25 ~ 85 °C (13 ~ 185 °F)
Humidity: 5 ~ 95%, non-condensing
Block diagram
USB
Controller
Data+
Data-
+5V
GND
Isolated
Power Supply
Auto
baud rate
detector
P
rot
ec
to
r
TX+/D+
TX- /D-
RX+
RX-
RTS+
RTS-
CTS+
CTS-
VSS
F.GND
EX-9531 user’s manual
