2-wire
resistance measurement method.
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Product
PXI Switch - 24-CH 2-Wire Multiplexer Module
PXI-7921
Matrix Switch Module
ADLINK PXI-7921 is a relay multiplexer which consists of 24 2-wire relays (DPDT, 2 Form C). As a multiplexer, the PXI-7921 provides 48x1 1-wire, 24x1 2-wire and 12x1 4-wire configurations. Users could choose one of the configurations by software. PXI-7921 typically connects one instrument, such as a DMM, a digitizer or a signal source, with many points which need measurement or excitation. The contact position of the relays can be changed either by direct software commands or by following the instructions previously stored in the on-board scan list. The scan list advances upon the trigger from external measurement devices, such as a DMM. The scan list could also advance when the scan-delay timer expires. In the PXI-7921, PXI trigger functions are supported and software programmable. Multiple modules can therefore be synchronized without additional field wiring.
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Product
PXIe-2738 , 256-Crosspoint, 8x32, 2-Wire PXI Matrix Switch Module
782835-38
Matrix Switch Module
256-Crosspoint, 8x32, 2-Wire PXI Matrix Switch Module—The PXIe‑2738 is a high‐density 8x32 PXI matrix switch module designed for routing signals within automated test systems and using electromechanical relays to perform immediate switch operations. It also offers features to monitor the health of deployed systems and plan for predictive maintenance, including onboard relay count tracking, a temperature sensor, and functional and resistive relay self-tests available through the NI Switch Health Center.
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Product
PXI High-Density Matrix Switch: 4x64, 2-Wire, 100Vrms/0.5A, Reed Relays
M9121A
Matrix Switch Module
The M9121A is a 4x64 full crosspoint switch matrix offering high-density, high-speed signal switching in a single PXI module. The 2-wire matrix allows multiple channels to be connected in a single instance. Any row can be connected to any column, making it ideal for routing instrument signals to the device under test. This 2-wire switch matrix provides the high-speed, long-life reed relays to support signal switching up 100Vrms with 10W maximum power. The 4-wide bus is ideal to route signals between test instruments and the device under test. Choose from the durable connector block or standard cable connections.
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Product
VXI 16-Channel, 2-Wire LVDT/RVDT Simulation
65DL1
Simulator
NAI’s 65DL1 is a 16-channel, 2-wire, LVDT/RVDT Simulation Instrument on a VXI board. This single-slot, message-based board provides 16 independent, transformer-isolated, LVDT/RVDT, programmable 2-wire outputs (up to 34 V), wrap-around self-test, and an onboard programmable excitation supply.
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Product
NI TB-2643B Terminal Block for NI 2532B as 1-Wire Dual 4x64 Matrix or 2-Wire 4×64 Matrix Topology Without Column Protection Resistors
782385-07
Terminal Block
The TB-2643B provides the necessary routing to configure the PXI-2532B or PXIe-2532B PXI Matrix Switch Module as a 2-wire 4x64 or 1-wire dual 4x64 matrix. You can directly connect the TB-2643B to the front panel I/O connectors of the PXI-2532B or PXIe-2532B. This terminal block includes ribbon cable headers to connect signals to the PXI Matrix Switch Module. The TB-2643B also provides optional isolation resistors to protect the reed relays from capacitive loads.
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Product
PXI High Density Multiplexer: 99-ch, 2-Wire, 100Vrms/1A, Armature Relays
M9103A
Multiplexer Module
The M9103A, a high-density, high-power 99-channel multiplexer routes many different channels to a single point. The switches operate in a break-before-make mode that ensures no two points are connected at the same time, or multiple channels can simultaneously connect if needed. This module is ideal for routing multiple analog signals to a measurement device in an automated test environment (ATE) or data acquisition systems. Each channel switch has a high and low for 2-wire switching. The high-quality armature relays are capable of switching up to 100Vrms, with up to 60W of power. Choose from the durable connector block or standard cable connections.
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Product
PXI-2529, 128-Crosspoint, 2-Wire PXI Matrix Switch Module
778739-01
Matrix Switch Module
The PXI‑2529 is a high‐density PXI matrix switch module that you can configure as either a 4x32 or 8x16 2‑wire matrix by using different terminal block accessories. It uses electromechanical relays that offer excellent performance for high-power signals and low thermal offset for accurate measurements at low-voltage levels. The PXI‑2529 also features onboard relay counting for relay monitoring and deterministic operation with hardware triggers to improve test throughput.
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Product
Temperature Sensors
TT420-LT
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Features • 2-wire, loop-powered 4-20 mA analog output • Attachment probe, sensor, and 2-wire 4-20 mA signal conditioner • Integral 1/2" flexible liquid-tight conduit fittings • TT420Z-LT 1/4” stainless steel probe with 1/8 NPT adapter • TT420S-LT 3/8-16 threaded stud probe • FM approved, Dust Ignition-proof • Class II and III, Div I (E, F, G); NEMA 4
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Product
SWB-2814, 8x9, 1 A, 2-Wire Reed Matrix Module for SwitchBlock
781421-14
Matrix Switch Module
8x9, 1 A, 2-Wire Reed Matrix Module for SwitchBlock - The SWB‑2814 is a reed relay matrix module for SwitchBlock systems. Designed for high power, it can operate as an individual relay card or expand in a single carrier or single PXI chassis. You can connect any input to any output, individually or in combination. You can use matrix switches to route signals from oscilloscopes, DMMs, arbitrary waveform generators, and power supplies to various test points on a unit under test (UUT). The primary benefit of matrix switches is simplified wiring—the overall test system can easily and dynamically change the internal connection path without any external manual intervention.
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Product
TB-2676, Ribbon, 100 V, PXI Module Multiplexer Terminal Block
779535-01
Terminal Block
Ribbon, 100 V, PXI Module Multiplexer Terminal Block - The TB-2676 features ribbon cable headers that help you access all channels of the PXI-2576 Multiplexer Switch Module. You can use the TB-2676 to configure the 16 banks of 4x1 2-wire multiplexers included with the PXI-2576.
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Product
External Temperature for 3-wire PT1000 Probe
TGP-4204
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PT1000 probes are available with this logger that will record down to -200C, making them suitable for cryogenic applications. The probes are of 3-wire construction and use class A elements, making them more accurate than their 2-wire predecessors.
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Product
Digital Power Recorder
MPR-601W-01
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MULTI MEASURING INSTRUMENTS Co., Ltd.
*Applicable for single phase 2wires and single phase 3wires and *3phase 3wires and 3phase 4wires system*Wide measuring range up to 0~500V/500A*Easy data logging by USB flash memory
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Product
REM-11115, 4-Channel, 2-Wire Analog Output Module for Remote I/O
784749-01
Analog Output Module
4-Channel, 2-Wire Analog Output Module for Remote I/O - The REM‑11115 is an analog output module for remote I/O. Remote I/O systems are low-cost, modular systems for simple machine control and measurements. A remote I/O system consists of an EtherCAT bus coupler and individual modules mounted on a DIN rail. You control the REM‑11115 from a real-time controller, such as a CompactRIO Controller or an Industrial Controller. You can use remote I/O hardware to add low-cost I/O for simple tasks while your controller handles advanced tasks such as image processing, motion control, and high-speed or specialty measurements. You can use the REM‑11115 for voltage or current output, and it features a 2‑wire spring terminal connection method. The REM‑11115 has selectable output ranges and short-circuit-proof output channels.
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Product
Sensor Tester
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*Connection facilities for DC 2-wire and 3-wire sensors, *Change in switching status signalled visually and acoustically, * 15 V operating voltage for sensors when using a 9 V block battery, * Switches off automatically when not in use, * Visual indicator for operating voltage, switching status and low battery
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Product
- RS-485 DIN Rail Mounted Surge Suppressor
Model 8021NX
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FEATURES: Fast Response; Automatic Recovery; Up To 20 MBPS Data Rate; DIN Rail Mounted; Triple Stage Protection; Two Wire. The Model 8021NX is a DIN Rail mounted surge suppressor for 2-wire RS-485 circuits used to protect factory data networks, or, any RS-485 network that wants to avail itself of the DIN Rail packaging concept. The Model 8021NX provides common-mode (line to ground) surge protection and differential mode (line to line) protection for balanced networks. All the inputs, outputs and ground connections are via screw terminals located on the top surface of the device.
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Product
Modbus Register Converter
Model 2390
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* Converts Modbus Registers and variables for replacement Modbus devices.* Maintain existing software when upgrading Modbus systems.* Provides serial control of Modbus RTU devices from any ASCII source.* User defined Register Conversion Table supports all Modbus RTU devices.* Internal Register Conversion Tables for Watlow F4-to-EZ-ZONE and F4-to-F4T conversion.* Serial ports support RS-232 and 2-wire/4-wire RS-485 signals.* Includes baud rate conversion capability.* Uses SCPI commands to load the Conversion Table and set serial settings.* Small metal case mounts on a DIN rail or on any flat panel.* 239x Table Loader Program uploads the 2390 Register Conversion Table from an Excel csv file.* 239x Serial Keyboard Program provides instant control of the 2390 and Modbus Slave Devices without writing a program.
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Product
Switch Mainframe
SW1002
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Switch between voltmeter and battery tester while testing. 264 channels max. (2-wire) to 72 channels max. (4-terminal pair). Circuit design friendly for impedance measurements that minimize errors between channels (Effect: 0.01% f.s.*). For BT4560 100 mΩ range, R measurements, and a measurement frequency of 1 kHz. For OCV measurement, internal resistance measurement, and external potential measurement of battery cells. Measure battery modules up to 60 V DC.
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Product
Door Contact Sensor
ENVIROMUX-M-DCS
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Monitors access with a magnetic bridge sensor, which responds to any magnetic material (no special inserts necessary). Can also be used for monitoring side wall and covers. Includes mounting hardware. For normally closed circuit connection. 2-wire interface. Screw terminal. Maximum cable length: 1,000 ft. Wide actuating gap, approximately 1". Dimensions WxDxH (in): 0.5x0.5x2 (Switch), 0.5x0.5x2 (Magnet). Operating temperature: 32 to 158°F (0 to 70°C). Regulatory approvals: RoHS.
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Product
Industrial Grade PCI DIO 96 Board
MS 1817
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*96 digital input/output lines*Support s all PPI Modes (Mode0, Mode 1 and Mode 2)*5 V TTL/CMOS*Compatible with NI DIO Card*2-wire handshaking capability*Known power-up
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Product
Radar Level Transmitter
DR7500
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Drexelbrook DR7500 is a 2-wire 80 GHz radar (FMCW) level transmitter for demanding liquid applications involving narrow tanks with long nozzles and internal obstructions like agitators or heating coils.
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Product
2Wire Temp Transmitter
TS
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● Accuracy: RTD: 0.5%, T/C: 0.75%● Wide selection of input● Low output ripple● High stability & low cost
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Product
Interface
RAR-cPCI
Interface
Available in a range of configurations to match your needs, the RAR-cPCI provides complete, integrated databus functionality for ARINC 429, ARINC 575 and selected 2-wire, 32-bit protocols in a CompactPCI form factor.
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Product
PXI Serial Interface Module
Serial Interface
The PXI Serial Interface Module offers a number of options for connecting to serial hardware. You can choose from common serial protocols, such as RS232, RS422, and RS485. The PXI Serial Interface Module also offers various isolation, hyperthreading, and multiprocessor compatibility options as well as 4- and 2-wire transceiver modes for full- and half-duplex communication. NI serial interfaces also appear as standard COM ports for compatibility with programs that use serial communications.
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Product
NI TB-2641B Terminal Block for NI 2532B as 1-Wire 8x64 Matrix Topology Without Column Protection Resistors
782385-03
Terminal Block
The TB-2641B provides the necessary routing to configure the PXI-2532B or PXIe-2532B PXI Matrix Switch Module as a 2-wire 4x128 matrix. You can directly connect the TB-2641B to the front panel I/O connectors of the PXI-2532B or PXIe-2532B. This terminal block includes ribbon cable headers to connect signals to the PXI Matrix Switch Module. The TB-2641B also provides optional isolation resistors to protect the reed relays from capacitive loads.
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Product
TB-2635, Screw Terminal, 8x16, 2-Wire PXI Module Matrix Terminal Block
778839-01
Terminal Block
Screw Terminal, 8x16, 2-Wire PXI Module Matrix Terminal Block - The TB-2635 provides the necessary routing to configure the PXI-2529 PXI Matrix Switch Module as a 2-wire 8×16 matrix. You can directly connect the TB-2635 to the front panel I/O connectors of the PXI-2529. The TB-2635 includes screw terminals that provide access to the rows and columns of the matrix.
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Product
Keysight Dual/Quad 4x8 Reed Matrix for 34980A
34933A
Matrix Switch Module
The Keysight 34933A module for the 34980A Multifunction Switch/Measure Unit gives you the most flexible connection path between your device under test and your test equipment, allowing different instruments to be connected to multiple points on your device under test at the same time. Dual 4x8, 8x8, or 4x16 2-wire configurations 64 2-wire or 128 1-wire cross-points High-speed reed relays Connections to the internal DMM Expandable via four 2-wire analog buses Relay counter ±150 V peak, .5 A switch, 1.5 A carry current
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Product
Isolated RS-485
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Analog Devices offers a wide range of standard RS-485/RS-422 transceivers and iCoupler® isolated RS-485/RS-422 transceivers to suit many applications. The RS-485 specification meets the requirements for a truly multipoint communications network, and the standard specifies up to 32 drivers and 32 receivers on a single (2-wire) bus. Some RS-485 transceivers modify the input impedance to allow up to 8× more nodes to be connected to the same bus.
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Product
RS232 / RS485 / RS422 / Ethernet Surge Protectors
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Our passive, rugged, industrial-grade RS232 / RS485 / RS422 / Ethernet surge protectors are designed for direct industrial DIN-rail mounting and they come with two (2) or three (3) stages of surge protection — Gas Discharge Tube (GDT), protection resistors, and Transient Voltage Suppressor (TVS) - for maximum protection. From 2-wire RS485, 4-wire RS422 / RS485, to 10 / 100 / 1000M Ethernet, CommFront's surge protectors safeguard your data lines and provide you with a peace of mind.
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Product
Banana-Triax Adapter For 2‑Wire (Non-Kelvin) Connection
N1297A
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The N1297 Series is a collection of banana-triax adapters for the Keysight B2900 Series precision source measure unit (SMU). It consists of both 2-wire as well as 4-wire connection requirements.





























