ES-U-2016-RM EasySync, ES-U-2016-RM Datasheet - Page 19

• Manufacturer Part Number: ES-U-2016-RM
• Description: USB Interface IC USB to 16 Ports RS422/RS485, Metal
• Manufacturer: EasySync

5.4
This section applies to the following adapters:
See the General Notes and Warnings on page 14 before changing settings or opening the cover. The DIP
switches should be set to select the correct serial mode before connecting the converter to your RS-
422/RS-485 serial bus.
DIP Switch Settings
On the outside of the unit, there are three DIP switches, which are used to select the required serial
mode (RS-422 or RS-485).
Jumper Settings
Inside the unit, there is a 7x2 (14 pin) header block for each serial port. Jumpers are used to select
features such as 120 Ohm termination on Tx, Rx and CTS, and 750 Ohm biasing resistors on Tx and Rx.
You will need to open up the cover and set the jumpers as per the requirements of your application.
ES-U-2xxx-M and ES-U-2xxx-RM with 3 DIP Switches
ES-U-2002-M
ES-U-2102-M
ES-U-2008-M
ES-U-2016-RM
Jumper
11 - 12
13 - 14
9 - 10
1 - 2
3 - 4
5 - 6
7 - 8
RS-422
RS-485
See the notes in section 5.1 before setting Termination and Biasing
Enable Tx+/- Termination with 120 Ohm. This jumper should be
populated for RS-485 half-Duplex mode
Pull-up Tx+ to VCC by 750 Ohm Bias resistor. This jumper should be
populated to enable pull-up of Tx+
Pull-down Tx- to GND by 750 Ohm Bias resistor This jumper should be
populated to enable pull-down of Tx-
Enable Rx+/- Termination with 120 Ohm. This jumper should be
populated for RS-422 and RS-485 Full-Duplex mode
Pull-up Rx+ to VCC by 750 Ohm Bias resistor. This jumper should be
populated to enable pull-up of Rx+
Pull-down Rx- to GND by 750 Ohm Bias resistor. This jumper should be
populated to enable pull-down of Rx-
Enable CTS Termination with 120 Ohm. This jumper should be populated
for RS-422 mode
Table 7
4 Wire with handshaking
Full Duplex (4 wire)
Half Duplex (2 wire) with Echo
Half Duplex (2 wire) without Echo
Table 6
Operation Mode
©2010 - 2011 EasySYNC Ltd.
Jumpers to select termination and biasing
RS-422 & RS-485 Mode Configuration
Function
OFF
OFF
OFF
ON
S1
Document Reference No.: ES_000061
USB to Serial Converters Manual
OFF
OFF
ON
ON
S2
Clearance No.: ES
OFF
S3
ON
ON
ON
Version 1.2
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