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INSTALLATION INSTRUCTIONS
NI TBX-2808
Screw Terminal Accessory for the NI SwitchBlock
This installation guide describes how to install and connect signals to the NI TBX-2808 screw
terminal accessory for use with NI SwitchBlock cards.
The NI TBX-2808 is an unshielded, DIN-rail mountable terminal breakout block that consists
of a printed circuit board with screw terminals that provide connections to all channels of a
single NI SwitchBlock card. The NI TBX-2808 includes a safety interlock resistor to engage the
NI SwitchBlock card's safety relays, allowing connections to the NI SwitchBlock analog bus.
Specifications
Maximum voltage............................................. 100 V, CAT I
(row/column-to-ground)
Maximum current (per screw terminal) ............ 2 A
Maximum current (per terminal block) ............ 64 A
Caution
for connection to signals or for measurements within Categories II, III, or IV.
Caution
the NI SwitchBlock system. Review the specifications of the NI SwitchBlock carrier
and cards.
Caution
proper cable/wire strain relief(s) prior to use. There are no user serviceable parts
inside. Do not change or alter this product in any way.
Caution
to ensure compliance with Electromagnetic Compatibility (EMC) requirements. To
determine if shielded cables or accessories are required for the product that the
NI TBX-2808 will be used with, refer to the EMC specifications in the product's user
guide or manual. If shielded cables or accessories are required for EMC compliance,
do not use unshielded cables or accessories unless they are installed in a shielded
enclosure with properly designed and shielded input/output ports, and are connected
to the NI product using a shielded cable. If unshielded cables or accessories are not
properly installed and shielded, the EMC specifications for the product are no longer
guaranteed.
This product is rated for Measurement Category I. Do not use this product
The maximum voltage is limited to the lowest voltage of any component in
The NI TBX-2808 must be installed inside a suitably rated enclosure with
NI products typically must be operated with shielded cables and accessories
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Summary of Contents for NI TBX-2808
- Page 1 NI TBX-2808 Screw Terminal Accessory for the NI SwitchBlock This installation guide describes how to install and connect signals to the NI TBX-2808 screw terminal accessory for use with NI SwitchBlock cards. The NI TBX-2808 is an unshielded, DIN-rail mountable terminal breakout block that consists of a printed circuit board with screw terminals that provide connections to all channels of a single NI SwitchBlock card.
- Page 2 Allow the signal wires to exit through the cover opening. Note The NI TBX-2808 screw terminal accessory does not provide strain relief for signal wires. Add strain relief and insulation for your signal wires, if necessary. Replace the cover and tighten the cover screws.
- Page 3 Refer to Figure 2 and perform the following steps to connect the screw terminal accessory to the NI SwitchBlock card connector: Securely fasten the connector on one end of the cable to the NI SwitchBlock card connector using the thumbscrews.
- Page 4 You can attach them in only one way. Tie the ground terminal to an earth ground to ground the screw terminal end of the cable shield. Do not force the cable when inserting it into or removing it from the NI SwitchBlock card connector. NI SwitchBlock carrier...
- Page 5 Refer to Figure 3 for NI TBX-2808 pinouts. Figure 3. NI TBX-2808 Pinouts © National Instruments NI TBX-2808 Installation Instructions...
- Page 6 NI TBX-2808 assembly onto a DIN rail with a firm push. To unmount the NI TBX-2808 from the DIN rail, place a flathead screwdriver into the slot above the terminal block base and pry it away from the rail.
- Page 7 For additional environmental information, refer to the NI and the Environment Web page at . This page contains the environmental regulations and directives with ni.com/environment which NI complies, as well as other environmental information not included in this document. Waste Electrical and Electronic Equipment (WEEE)
- Page 8 LabVIEW, National Instruments, NI, ni.com, the National Instruments corporate logo, and the Eagle logo are trademarks of National Instruments Corporation. Refer to the Trademark Information at ni.com/trademarks for other National Instruments trademarks. Other product and company names mentioned herein are trademarks or trade names of their respective companies. For patents covering National Instruments products/technology, refer to the appropriate location: Help»Patents in your software, the patents.txt file on your media, or the National...
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