AD/DA TERMINAL BOARD
INTRODUCTION
The AD/DA terminal board provides screw terminals for connecting analog or digital I/O signals,it contains two digital to analog screw terminals and 16 screw terminals which provides single-ended or differential analog to digital connector.The terminal board can be used to several applications such as : low-pass filter,current shunt, and voltage attenuator by adding resistors and capacitors on the reserved circuit pads.
The features of AD/DA terminal board are:
* Provides two D/A screw terminals.
* Provides 16 single-ended A/D channels or 8 differential A/D channels.
* Built in screw terminal for easy wiring.
* Screw terminal: accept #22 to #12 awg wire.
* LED indicates when board is operating.
* Provides reserved circuit pads for low-pass filter,current,shunt,and voltage atenuator...etc.

The package contains:
* AD/DA terminal board.
* One 26 pin flat cable.
* user's manual.
HARDWARE CONFIGURATION
Before you use the AD-DA terminal board,you must ensure that the connectors are set correctly.Observe the figure in the following,the proper settings for the AD/DA terminal board are described in the follows.
DECISION-COMPUTER international Co., ltd



Pin Assignments Change Information
The produces of DECISION PCI data acquisition cards and ISA DA AD/DA terminal board have different pin assignments,before turn on your computer ,please check signals connection correctly.
1.Pin assignments of PCI 12/14 bits data acquisition card


2.Pin assignments of AD/DA terminal board
Pin Assignments
The 25 pin Dtype connector is provided to connet the AD/DA terminal board to AD/DA card. The singal assignment of 25 pin connector are shown in the follows.
1. Single-ended Mode
Pin Function Pin Function
1 +12V 14 -12
2 D/A-CH2 OUT 15 D/A CH1 OUT
3 GND 16 A/D-CH15
4 A/D-CH14 17 A/D-CH13
5 A/D-CH12 18 A/D-CH11
6 A/D-CH10 19 A/D-CH9
7 A/D-CH8 20 A/D-CH7
8 A/D-CH6 21 A/D-CH5
9 A/D-CH4 22 A/D-CH3
10 A/D-CH2 23 A/D-CH1
11 A/D-CH0 24 GND
12 GND 25 -5V
13 +5V
          2. Differential Mode
Pin Function Pin Function
1 +12V 14 -12
2 D/A-CH2 OUT 15 D/A CH1 OUT
3 GND 16 A/D-CH7 -
4 A/D-CH7 + 17 A/D-CH6 -
5 A/D-CH6 + 18 A/D-CH5 -
6 A/D-CH5 + 19 A/D-CH4 -
7 A/D-CH4 + 20 A/D-CH3 -
8 A/D-CH3 + 21 A/D-CH2 -
9 A/D-CH2 + 22 A/D-CH1 -
10 A/D-CH1 + 23 A/D-CH0 -
11 A/D-CH0 + 24 GND
12 GND 25 -5V
13 +5V


Screw Terminal Specification
The singal specification of TB1,TB2,TB3,TB4 are shown in the follows.
1. Single-Ended Mode
No. TB1 TB2 TB3 TB4
1 GND +12V -12V GND
2 GND D/A-CH2 OUT D/A-CH1 OUT GND
3 GND A/D-CH14 A/D-CH15 GND
4 GND A/D-CH12 A/D-CH13 GND
5 GND A/D-CH10 A/D-CH11 GND
6 GND A/D-CH8 A/D-CH9 GND
7 GND A/D-CH6 A/D-CH7 GND
8 GND A/D-CH4 A/D-CH5 GND
9 GND A/D-CH2 A/D-CH3 GND
10 GND A/D-CH0 A/D-CH1 GND
11 GND +5V -5V GND
         
2. Differential Mode
No. TB1 TB2 TB3 TB4
1 GND +12V -12V GND
2 GND D/A-CH2 OUT D/A-CH1 OUT GND
3 GND A/D-CH7 + A/D-CH6 - GND
4 GND A/D-CH6 + A/D-CH6 - GND
5 GND A/D-CH5 + A/D-CH5 - GND
6 GND A/D-CH4 + A/D-CH4 - GND
7 GND A/D-CH3 + A/D-CH3 - GND
8 GND A/D-CH2 + A/D-CH2 - GND
9 GND A/D-CH1 + A/D-CH1 - GND
10 GND A/D-CH0 + A/D-CH0 - GND
11 GND +5V -5V GND
    
     
    
Basic Combination Circuit
The basic combination circuit of AD/DA terminal board are shown in the following.

    
For different applications,the resistor and capacitors combination are shown in the follows.

1.Single-Ended Mode
    
2.Differential Mode
    
APPLICATIONS
The applications of AD/DA terminal board are specificated in the follows.
    
1.Single-Ended Mode
    
2.Differential Mode