Connections and Wiring
29
NI-2000, NI-3000, NI-4000 Hardware Reference Guide
Input/Output (I/O) Port: Connections and Wiring
The I/O port responds to either switch closures, voltage level (high/low) changes, or it can be used for
logic-level outputs.
A contact closure between the GND and an I/O port is detected as a Push.
When used for voltage inputs, the I/O port detects a low signal (0 - 1.5 VDC) as a Push, and a
high signal (3.5 - 5 VDC) as a Release (
this IO port uses 5V logic but can handle up to 12V
without harm).
When used for outputs, the I/O port acts as a switch to GND and is rated for 200mA
@ 12 VDC.
The NI-2000 can use up to 4 I/O ports
The NI-3000 and NI-4000 can use up to 8 I/O ports
The PWR pin pr12 VDC @ 200 mA and is designed as a power output for the PCS
Power Current Sensors, VSS2 Video Sync Sensors (or equivalent).
The GND connector is a common ground and is shared by all I/O ports. A common ground is
shared with I/O ports 1 - 8 (NI-3000/NI-4000) or with I/O ports 1 - 3 (NI-2000).
FIG. 6
RELAY connector (male)
FIG. 7
INPUT/OUTPUT (I/O) connector (male)
I/O Port Wiring Specifications
NI-4000 and NI-3000
I/O Port Wiring Specifications NI-2000
Pin
Signal
Function
Pin
Signal
Function
1
GND
Signal GND
1
GND
Signal GND
2
I/O 1
Input/Output
2
I/O 1
Input/Output
3
I/O 2
Input/Output
3
I/O 2
Input/Output
4
I/O 3
Input/Output
4
I/O 3
Input/Output
5
I/O 4
Input/Output
5
I/O 4
Input/Output
6
I/O 5
Input/Output
6
12 VDC
PWR
7
I/O 6
Input/Output
8
I/O 7
Input/Output
9
I/O 8
Input/Output
10
12 VDC
PWR
NI-4000/NI-3000 relay connector
configuration (Port 8)
NI-2000 relay connector
configuration (Port 4)
NI-4000/NI-3000 I/O connector
configuration (Port 17)
NI-2000 I/O connector
configuration (Port 9)