Publication 1764-UM001A-US-P
Installing and Wiring Your Module 3-9
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 3.8 through Figure 3.12 are
provided to help you make the appropriate connection.
Table 3.2 DTE Configurations
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
Spare Allen-Bradley Parts
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