13 ECU-1251 Series User Manual
Chapter 3 Wiring and Installation
3.1.3 Wireless Card Installation
ECU-1251 is equipped with a Mini-PCIe interface on the front of motherboard, which
supports one full-size wireless network card. If users also need SIM card, slot on the
front of motherboard can be used. The installation is shown as below.
Figure 3.3 USB Connector
Figure 3.4 LAN Connectors (LAN1~LAN4)
Table 3.3: USB Connector Pin Assignment
Pin Signal
1VCC
2DATA-
3DATA+
4GND
Table 3.4: LAN Connector Pin Assignments
Pin Assignment Description
1 TD+ Transmit+
2 TD- Transmit-
3 RD+ Receive+
4 N/C Not used
5N/C N/C
6 RD- Receive-
7N/C N/C
8N/C N/C
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