ES-U-2016-RM EasySync, ES-U-2016-RM Datasheet - Page 23

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

6
This section shows the connector pinouts used on the ES-U-xxxx-x converters.
6.1
DB-9 Male connector
The RS232 ports are configured as Data Terminal Equipment (DTE), with a 9-contact D-Sub Pin
connector. Pin assignments are according to TIA/EIA-574 which formally defines the assignments for a
COM port found on many personal computers.
Pin Number
Connector Pinout Information
Shield
RS-232 Signal Pin-out
1
2
3
4
5
6
7
8
9
Case Ground
Pin Type
Ground
Output
Output
Output
Input
Input
Input
Input
Input
Table 13
Figure 14
Description
DCD = Data Carrier Detect
RXD = Receive Data
TXD = Transmit Data
DTR = Data Terminal Ready
GND = RS232 signal ground
DSR = Data Set Ready
RTS = Request To Send
CTS = Clear To Send
RI = Ring Indicator
Drain = typically connected to the host PC case
©2010 - 2011 EasySYNC Ltd.
RS-232 Pin-Out for DB-9 connector
DB-9 Male connector pin numbers
Document Reference No.: ES_000061
USB to Serial Converters Manual
Clearance No.: ES
Version 1.2
# 35
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