USB2-H-9004-M EasySync, USB2-H-9004-M Datasheet - Page 10

• Manufacturer Part Number: USB2-H-9004-M
• Description: USB Interface IC Hi-speed USB to 4prt Srl RS232/RS485 adpt
• Manufacturer: EasySync

Specifications of USB2-H-9004-M

• Rohs: yes

2
2.1
2.2
The USB2-H-9004-M supports 4 serial channels. All 4 can be independently set as either RS232 or RS485.
Channel configuration is done using switches SW1 to SW4. Various jumpers also allow power supply
source and pull-up/pull-down termination resistors.
Switch SW1 to SW4 Settings
table:
Table 2.1 –Switch Setting Configuration of the USB2-H-9004-M
The following gives a brief description of SW1 to SW4 switches.
Modes:
The USB2-H-9004-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-9004-M has a 120Ω termination resistor which can be switched in or out of the circuit when
5V Out:
This +5V supply is available after the USB2-H-9004 is fully enumerated and device drivers are loaded.
The default SWx switch settings enable RS485 mode. This can be changed as shown in the following
the channel is used in RS485 mode.
configuration
Position
Channel 1
Installation
SW1
Example Applications and Configurations
Hardware Configuration
1
2
3
4
configuration
Position
Channel 2
SW2
1
2
3
4
USB2-H-9004-M Hi-Speed USB to 4-Port RS232/RS485 Adapter Data Sheet
configuration
Position
Channel 3
SW3
1
2
3
4
©2010 EasySync Ltd.
configuration
Position
Channel 4
SW4
1
2
3
4
Document Reference No.: ES_000047
resistor enabled
5V Out Disable
RS232 mode
RS485 Echo
Termination
enabled
Open
(off)
120R
Clearance No.: ES
120R Termination
resistor disabled
5V Out Enable
RS485 mode
RS485 Echo
Closed
disabled
(on)
Version 1.0
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