Output (sink) current limits, Output (source) current limits – Measurement Computing USB-DIO96H User Manual
Page 13
USB-DIO96H User's Guide
Functional Details
13
Board label
Signal name
Board label
Signal name
Port 2
A0
P2A0 (SECONDPORTA Bit 0)
Port 4
A0
P4A0 (FOURTHPORTA Bit 0)
A1
P2A1 (SECONDPORTA Bit 1)
A1
P4A1 (FOURTHPORTA Bit 1)
A2
P2A2 (SECONDPORTA Bit 2)
A2
P4A2 (FOURTHPORTA Bit 2)
A3
P2A3 (SECONDPORTA Bit 3)
A3
P4A3 (FOURTHPORTA Bit 3)
A4
P2A4 (SECONDPORTA Bit 4)
A4
P4A4 (FOURTHPORTA Bit 4)
A5
P2A5 (SECONDPORTA Bit 5)
A5
P4A5 (FOURTHPORTA Bit 5)
A6
P2A6 (SECONDPORTA Bit 6)
A6
P4A6 (FOURTHPORTA Bit 6)
A7
P2A7 (SECONDPORTA Bit 7)
A7
P4A7 (FOURTHPORTA Bit 7)
B0
P2B0 (SECONDPORTB Bit 0)
B0
P4B0 (FOURTHPORTB Bit 0)
B1
P2B1 (SECONDPORTB Bit 1)
B1
P4B1 (FOURTHPORTB Bit 1)
B2
P2B2 (SECONDPORTB Bit 2)
B2
P4B2 (FOURTHPORTB Bit 2)
B3
P2B3 (SECONDPORTB Bit 3)
B3
P4B3 (FOURTHPORTB Bit 3)
B4
P2B4 (SECONDPORTB Bit 4)
B4
P4B4 (FOURTHPORTB Bit 4)
B5
P2B5 (SECONDPORTB Bit 5)
B5
P4B5 (FOURTHPORTB Bit 5)
B6
P2B6 (SECONDPORTB Bit 6)
B6
P4B6 (FOURTHPORTB Bit 6)
B7
P2B7 (SECONDPORTB Bit 7)
B7
P4B7 (FOURTHPORTB Bit 7)
C0
P2C0 (SECONDPORTC Bit 0)
C0
P4C0 (FOURTHPORTC Bit 0)
C1
P2C1 (SECONDPORTC Bit 1)
C1
P4C1 (FOURTHPORTC Bit 1)
C2
P2C2 (SECONDPORTC Bit 2)
C2
P4C2 (FOURTHPORTC Bit 2)
C3
P2C3 (SECONDPORTC Bit 3)
C3
P4C3 (FOURTHPORTC Bit 3)
C4
P2C4 (SECONDPORTC Bit 4)
C4
P4C4 (FOURTHPORTC Bit 4)
C5
P2C5 (SECONDPORTC Bit 5)
C5
P4C5 (FOURTHPORTC Bit 5)
C6
P2C6 (SECONDPORTC Bit 6)
C6
P4C6 (FOURTHPORTC Bit 6)
C7
P2C7 (SECONDPORTC Bit 7)
C7
P4C7 (FOURTHPORTC Bit 7)
CTR
CTR
5V
5V
GND
GND
GND
GND
Digital I/O (FIRSTPORTA Bit 0 to FOURTHPORTC Bit 7)
You can connect up to 96 digital I/O lines to the four banks of screw terminals (Port 1 to Port 4). Connect up to
24 DIO lines to each screw terminal group:
Connect up to 24 FIRSTPORT signals to the
PORT 1
terminals.
Connect up to 24 SECONDPORT signals to the
PORT 2
terminals.
Connect up to 24 THIRDPORT signals to the
PORT 3
terminals.
Connect up to 24 FOURTHPORT signals to the
PORT 4
terminals.
You can configure each digital port for either input or output. When configured for input, you can use the
digital I/O terminals to detect the state of any TTL level input. Refer to the schematic shown in Figure 6.
Figure 6. Schematic showing switch connection to digital channel FIRSTPORTA Bit 0
When set to the +5V input, FIRSTPORTA Bit 0 reads 1. When set to GND, FIRSTPORTA Bit 0 reads 0.
Output (sink) current limits
Each DIO pin can sink 64 mA maximum when configured for output.
Output (source) current limits
Each DIO pin can source 24 mA maximum when configured for output.
For more information about digital signal connections
Additional information about digital signal connections and I/O techniques is available in the Guide to Signal
Connections (available on our web site