Lantronix Micro125, Integration Manual, Page: 17 / 19

A: Compliance and Warranty Information
Micro125 Embedded Device Server Integration Guide 17
Figure 4-2 Pin Configurations
Test Bed Connectors
The Micro125 test bed has four connectors: CON1 (Serial Port 1 or Channel 1), CON2
(TTL Interface), CON4 (Serial Port 2 or Channel 2), and CON3, which is a 5VDC power
supply connector.
This RS-232 level serial interface is implemented with a DB9F connector. The Micro125
converts the RS-232 serial transmit and receive data of this interface to Ethernet protocol
transmit and receive data. The DB9 connector was selected for compatibility with most
PC serial interface ports using a straight through cable.
Table 4-1 Micro125 Test Bed Connectors
CON1 Serial Port
(Channel) 1a CON2 TTL Interface CON4 Serial Port
(Channel) 2b
Pin Signal Pin Signal Pin Signal
1 DTRA (output) 1 +5 VDC 1 TxB (output)
2 TxA (output) 2 GND 2 RxB (input)
3 RxA (input) 3 TxA (output) 3 GND
4 DCDA (input) 4 RxA (input)
5 GND 5 CTSA (input)
6 None 6 DCDA (input)
7 CTSA (input) 7 RTSA (output)
8 RTSA (output) 8 DTRA (output)
9 None 9 None
10 None
11 TxB (output)
12 RxB (input)
a. CON1 Serial Port (Channel) 1 is also designated as A.
b. CON4 Serial Port (Channel) 2 is also designated as B.