National Instruments NI TB-2708 User Manual
INSTALLATION GUIDE
NI TB-2708
PXI Terminal Block for S Series Devices
This installation guide describes how to install and connect signals to the
NI TB-2708 terminal block for use with PXI-6115/6120 S Series devices.
Caution The connectors of the TB-2708 are sensitive to electrostatic discharge (ESD). The
user should ground themselves and/or design watchdog timing into their application prior
to connecting or disconnecting signals.
Introduction
The TB-2708 is a terminal block assembly consisting of nine SMB
connectors and a 14-pin I/O connector. The terminal block assembly
connects directly to the front panel of National Instruments PXI-6115
and PXI-6120 devices, eliminating the need for an external cable.
1
2
1 Access Door to Configuration Switches
2 14-Pin I/O Connector (Digital Signals)
Figure 1. TB-2708 Device View
I
AI 0
AI 1
AI 2
AI 3
0
O
S
SAMP
CTR 0
A
O 1
A
AI
T
AR
T
TRIG
AI
CLK
OUT
3
3 SMB Connectors (Analog Signals)
The nine SMB connectors on the TB-2708 allow you to easily connect
analog input and analog output signals to your National Instruments device.
The 14-pin I/O connector located on the bottom of the TB-2708 allows
access to digital signals.
Caution The TB-2708 is not designed for input voltages greater than 42 V
even if you install a voltage divider that reduces the voltage to within the input range of the
DAQ device. Input voltages greater than 42 V
device connected to it, and the host computer. Overvoltage also can cause an electric shock
hazard for the operator. National Instruments is not liable for damage or injury resulting
from such misuse.
What You Need to Get Started
You need the following to set up and use your terminal block:
❑ NI TB-2708 Terminal Block Assembly
❑ NI TB-2708 Installation Guide
❑ One of the following:
– NI PXI-6115
– NI PXI-6120
❑ S Series User Manual
❑ Number 1 Phillips screwdriver
Safety Information
/60 VDC,
pk
/60 VDC can damage the TB-2708, any
pk
Cautions Do not operate the device in an explosive atmosphere or where there may be
flammable gases or fumes.
Do not operate damaged equipment. The safety protection features built into this device
can become impaired if the device becomes damaged in any way. If the device is damaged,
turn the device off and do not use it until service-trained personnel can check its safety.
If necessary, return the device to National Instruments for service and repair to ensure that
its safety is not compromised.
Do not operate this equipment in a manner that contradicts the information specified in this
document. Misuse of this equipment could result in a shock hazard.
NI TB-2708 Installation Guide 2 ni.com
Do not substitute parts or modify equipment. Because of the danger of introducing
additional hazards, do not install unauthorized parts or modify the device. Return the
device to National Instruments for service and repair to ensure that its safety features
are not compromised.
Yo u must insulate all of your signal connections to the highest voltage with which the
TB-2708 can come in contact.
Connections, including power signals to ground and vice versa, that exceed any of the
maximum signal ratings on the terminal block can create a shock or fire hazard, or can
damage any or all of the boards connected to the host computer and the terminal block.
National Instruments is not liable for any damages or injuries resulting from incorrect
signal connections.
Clean the module and accessories by brushing off light dust with a soft non-metallic brush.
Remove other contaminants with a stiff non-metallic brush. The unit must be completely
dry and free from contaminants before returning it to service.
Installation
The TB-2708 connects directly to the front panel of the PXI DAQ device,
as shown in Figure 2.
2
3
1
1 Terminal Block Mounting Screws
2 PXI Chassis
Figure 2. Connecting the TB-2708 to an S Series Device
© National Instruments Corporation 3 NI TB-2708 Installation Guide
3 68-Pin I/O Connector on PXI Device
To connect the terminal block to the PXI module I/O connector, refer to
Figure 2 as you complete the following steps:
1. Install the PXI module into the chassis and tighten the two module
screws. You must install the PXI device before connecting the
TB-2708. Refer to the DAQ Getting Started Guide for instructions
on installing your PXI device.
2. Guide the terminal block onto the PXI module connector.
Caution Do not force the terminal block when inserting it into or removing it from the PXI
module I/O connector.
3. Tighten the two terminal block mounting screws.
Signal Descriptions
Figure 3 shows the front panel of the TB-2708, and Figure 4 shows the
TB-2708 block diagram. Refer to Table 1 for a brief description of each
signal available on the TB-2708.
Figure 3. NI TB-2708 Front Panel
NI TB-2708 Installation Guide 4 ni.com
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