UMDAS 0802DA User's Guide

Functional Details

Screw terminal – pins 21-40

The screw terminals on the bottom edge of the (pins 21 to 40) provide the following connections:

!16 digital I/O connections (PortA0 to Port A7, and Port B0 to Port B7)

!One power connection (PC+5 V)

!Three ground connections (GND)

Main connector and pin out

Connector type

Screw terminal

Wire gauge range

16 AWG to 30 AWG

20 CTR 19 SYNC 18 TRIG IN 17 GND 16 +2.5VREF 15 AGND 14 D/A OUT 1 13 D/A OUT 0 12 AGND 11 CH7 IN 10 CH6 IN 9 AGND 8 CH5 IN 7 CH4 IN 6 AGND 5 CH3 IN 4 CH2 IN 3 AGND 2 CH1 IN 1 CH0 IN

20 CTR 19 SYNC 18 TRIG_IN 17 GND 16 +2.5VREF 15 AGND 14 D/A OUT 1 13 D/A OUT 0 12 AGND 11 CH3 IN LO 10 CH3 IN HI 9 AGND 8 CH2 IN LO 7 CH2 IN HI 6 AGND 5 CH1 IN LO 4 CH1 IN HI 3 AGND 2 CH0 IN LO 1 CH0 IN HI

40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21

40 39 38 37 36 35 34 33 32 31 30 29 28 27 26 25 24 23 22 21

GND Port B7 Port B6 Port B5 Port B4 Port B3 Port B2 Port B1 Port B0 GND PC +5 V GND Port A7 Port A6 Port A5 Port A4 Port A3 Port A2 Port A1 Port A0

GND Port B7 Port B6 Port B5 Port B4 Port B3 Port B2 Port B1 Port B0 GND PC +5 V GND Port A7 Port A6 Port A5 Port A4 Port A3 Port A2 Port A1 Port A0

8-channel single-ended mode pin out

4-channel differential mode pin out

Analog input terminals (CH0 IN - CH7 IN)

You can connect up to eight analog input connections to the screw terminal containing pins 1 to 20 (CH0 IN through CH7 IN.) Refer to the "Main connector and pin out" diagrams above for the location of these pins.

You can configure the analog input channels as eight single-ended channels or four differential channels. When configured for differential mode, each analog input has 14-bit resolution. When configured for single-ended mode, each analog input has 13-bit resolution, due to restrictions imposed by the A/D converter.

Single-ended configuration

When all of the analog input channels are configured for single-ended input mode, eight analog channels are available. The input signal is referenced to signal ground (GND), and delivered through two wires:

!The wire carrying the signal to be measured connects to CH# IN.

!The second wire connects to AGND.

The input range for single-ended mode is ±10 V. No other ranges are supported in this mode. Figure 3-3illustrates a typical single-ended measurement connection.

3-3