USB2-H-9002-M EasySync, USB2-H-9002-M Datasheet - Page 9

• Manufacturer Part Number: USB2-H-9002-M
• Description: USB Interface IC Hi-speed USB to 4prt Srl RS232/RS485 adpt
• Manufacturer: EasySync

Specifications of USB2-H-9002-M

• Rohs: yes

2
2.1
2.2
The USB2-H-9002-M supports 2 serial channels. Easy can be independently set as either RS232 or RS485.
Channel configuration is done using switches SW1 and SW2. Various jumpers also allow power supply
source and pull-up/pull-down termination resistors.
Switch SW1 and SW2 Settings
table:
Table 2.1 – Switch Setting Configuration of the USB2-H-9002-M
The following gives a brief description of the SW1 and SW2 switches.
Modes:
The USB2-H-9002-M can be configured as either an RS232 or RS485 serial interface.
Echo:
When the serial interface is set to RS485, then echo can be enabled or disabled.
Termination:
The USB2-H-9002-M has a 120Ω termination resistor which can be switched in or out of the circuit when
5V Out:
The RI pin of each channel can alternatively be used to output a +5V supply if the RI function is not
The default SW1 switch settings enable RS485 mode. This can be changed as shown in the following
the channel is used in RS485 mode.
required. This +5V supply is available after the USB2-H-9002 is fully enumerated and device drivers are
loaded.
Installation
Example Applications and Configurations
Hardware Configuration
configuration
Channel 1
Position
SW1
1
2
3
4
USB2-H-9002-M Hi-Speed USB to 2-Port RS232/RS485 Adapter Data Sheet
configuration
Channel 2
Position
SW2
1
2
3
4
©2010 EasySync Ltd.
120R Termination
resistor enabled
5V Out Disable
RS232 mode
RS485 Echo
enabled
Open
(off)
Document Reference No.: ES_000046
120R Termination resistor
RS485 Echo disabled
Clearance No.: ES
5V Out Enable
RS485 mode
Closed
disabled
(on)
Version 1.0
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