Owner's manual
Table Of Contents
- 42AFL-xxA-N270 Series Flat Panel PC
- 1 Introduction
- 2 Detailed Specifications
- 3 Unpacking
- 4 Installation
- 4.1 Anti-static Precautions
- 4.2 Installation Precautions
- 4.3 Preinstalled Components
- 4.4 Installation and Configuration Steps
- 4.5 Removing the Back Cover
- 4.6 CF Card Installation
- 4.7 HDD Installation (AF-12A-N270 Only)
- 4.8 AT/ATX Mode Selection
- 4.9 Jumper Settings
- 4.10 Mounting the System
- 4.11 Bottom Panel Connectors
- 5 System Maintenance
- 6 AMI BIOS Setup
- 7 Software Drivers
- A System Specifications
- B Safety Precautions
- C BIOS Configuration Options
- D Watchdog Timer
- E Hazardous Materials Disclosure
- F Index

AFL-xxA-N270 Series Panel PC
Page 39
The COM1 and COM3 Pin 9 Setting jumper locations are shown in Figure 4-8 below.
Figure 4-8: COM1 and COM3 Pin 9 Setting Jumper Locations
4.9.4.1 COM3 RS-422 and RS-485 Pinouts
The pinouts for RS-422 and RS-485 operation of external serial port COM 3 are detailed
below.
COM 3 RS-422 Description
Pin 1 TX-
Pin 2 TX+
Pin 6 RX-
Pin 7 RX+
Table 4-6: RS-422 Pinouts
COM 3 RS-485 Description
Pin 1 Data-
Pin 2 Data+
Table 4-7: RS-485 Pinouts