Dte and dce overview dte - data terminal equipment – Rockwell Automation 1746-BAS-T SLC 500 Basic Basic-T Modules User Manual
Page 45
Publication 1746-UM004B-EN-P - December 2005
Install and Wire Your Module 3-11
DTE and DCE Overview
DTE - Data Terminal Equipment
The module’s serial ports are configured as 9-pin Data Terminal
Equipment (DTE), as are most terminals or computer ports.
IMPORTANT
You need to know whether the device connecting to
the module has a DTE or DCE interface.
Figure 3.9 through Figure 3.13 are provided to help
you make the appropriate connection.
DTE 9 Pinout
Signal from
DTE
Perspective
DTE 25 Pinout
Pin #
Signal Description
Pin #
Signal Description
1
NC-No Connection
(for BASIC module only)
Input
8
CD-Carrier Detect
2
RXD-Received Data
Input
3
3
TXD-Transmitted Data
Output
2
4
DTR-Data Terminal Ready
Output
20
5
Com-Signal Common
Shared
7
6
DSR-Data Set Ready
Input
6
7
RTS-Request to Send
Output
4
8
CTS-Clear to Send
Input
5
9
NC-No Connection
(for BASIC module only)
Input
22
RI-Ring Indicator