User manual

Installation Instructions

EC3-1816CLD2NA - 7 -

2.4 Jumper Setting

1. JCC1: Clear/Keep CMOS Setting (Pitch: 2.0mm)

CMOS is powered by the button battery on board. Clearing CMOS will restore

original settings (factory default). The steps are listed as follows: (1) Turn off

the computer and unplug the power cable; (2) Instantly short circuit JCC1; (3)

Turn on the computer; (4) Follow the prompt on screen to enter BIOS setup

when booting the computer, load optimized defaults; (5) Save and exit. Please

set as follows:

Setup Function

1-2 Open Normal ((Default)

JCC1

1-2 Short

Clear the contents of CMOS and all BIOS

settings will restore to factory default values.

2. JP1: AT/ATX Power-on Mode Selection (Pitch: 2.0mm)

Setup Function

1-2 Open AT power-on mode

JP1

2-3 Short ATX power-on mode (Default)

3. JP2～JP3: COM1 RS-232/ RS-485 Mode selection (Pitch: 2.0mm)

COM1 supports two operating modes: RS-232/RS-485. The mode selection can be

realized by setting JP2/JP3.

Mode Selection

Setting

RS-232

（Default）

RS-485

JP2 1-2 3-4

JP2, JP3

JP3

1-3

2-4

3-5

4-6