2-wire
resistance measurement method.
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Product
Micro-Ohmmeter
3207
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The Ballantine 4 Digit Micro-ohm Meter 3207 measures Low Resistance in Milli and micro-ohms with precise accuracy. It employs the proven 4-wire measurement technique and eliminates the lead resistance inherent in 2-wire technique to give accurate readings.
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Product
Ultra High Density Matrix Switch Card
1260-45
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The Astronics 1260-45 offers the highest-density switching matrices in a single-slot C-size VXI module, configurable as 11 different matrices from four 4x16 2-Wire to one 16x16 two-wire. Easily extend this module externally to build a larger matrix in a single VXI chassis to satisfy even the most dense applications.
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Product
4 Wire Earth Resistance & Resistivity Tester
4235 ER
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Standard Electric Works Co., Ltd
● Microprocessor-controlled.● Earth resistivity (ρ) test.● Earth testing at 20Ω, 200Ω, 2kΩ.● Earth voltage measuring : 0-300V AC.● Automatic C spike check.● Automatic P spike check.● 2-Wire test, 3-Wire test, 4-Wire test.● LCM display.● Auto ranging.● Auto power OFF.● Data hold.● 200 measurement results can be saved in the memory and recalled on the display.● Interval between auxiliary earth spikes is 1.0~50.0m.
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Product
4x8 2 Wire USB Modular Switch Matrix
U2751A
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The U2751A USB Modular Switch Matrix offers a flexible connection path between the device under test and the test equipment, thus allowing different instruments to be connected to multiple points on the device under test at the same time. This instrument is able to support measurements at a high bandwidth of up to 45MHz. It uses the common non-proprietary standard high-speed USB 2.0 interface that provides ease of connectivity
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Product
T100 Toxic Gas Transmitter
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The T100 is a 4-20mA 2-wire transmitter that can measure a wide range of gases. Housed in a rugged, compact metal enclosure, it is designed to be maintenance free and inherently stable.
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Product
PXI-2576, 64‐Channel, 2-Wire, Multibank PXI Multiplexer Switch Module
778572-76
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64‐Channel, 2-Wire, Multibank PXI Multiplexer Switch Module —The PXI‑2576 is a multibank PXI multiplexer switch module with 16 banks of 4x1 2‑wire multiplexers. With the flexible architecture of the PXI‐2576, you can configure it in a variety of topologies that make it suitable for parallel measurement operations requiring low‐channel counts, or you can combine all multiplexer banks to form a single high‐channel‐count multiplexer featuring 64 2‑wire channels. It also features onboard relay counting for relay monitoring and deterministic operation with hardware triggers to improve test throughput.
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Product
Weather Resistant Surge Protector for RS485 Control & 12VDC Power Lines
SP-RS485-12V-O
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Ideal for applications such as video surveillance cameras and access control. Protects sensors running on 22 AWG 2-wire sensor cables or 12VDC power lines against the effects of electrostatic discharge, faulty wiring and lightning. RS485 protection: Stage 1 clamping voltage: ±90V; Stage 2 resistance: 3.3 Ohms; Stage 3 clamping voltage: ±7.5V. 12VDC power lines protection: Stage 1 clamping voltage: ±90V; Stage 2 current rating: 3A; Stage 3: 12V TVS (transient voltage suppression) diode. Screw terminal pairs for RS485 and 12VDC power lines protection. Will also protect two single ended data, analog or control lines. Impact and weather resistant enclosure with locking hinged cover.
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Product
Interface
RAR-cPCI
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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
Proximity Sensors
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Cutler-Hammer® proximity sensors that deliver the results you're looking for. Choose from photoelectric sensors, 2-wire AC and 3-wire DC inductive sensors, sensors with LED indicators, and more.
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Product
PXI-2527, 32‐Channel, 300 V, 2‐Wire PXI Multiplexer Switch Module
778572-27
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32‐Channel, 300 V, 2‐Wire PXI Multiplexer Switch Module—The PXI‑2527 is a high‐voltage PXI multiplexer switch module that is ideal for medium‐ to high‐density automated test applications. Featuring high-power electromechanical relays, the PXI‑2527 is the perfect front end for the PXI DMM modules, offering simple channel expansion for a variety of measurements. The PXI‑2527 supports multiple channel configurations including 64x1 1‑wire, 32x1 2‑wire, and 16x1 4‑wire. It also features onboard relay counting for relay monitoring and deterministic operation with hardware triggers to improve test throughput.
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Product
NI TB-2646B Terminal Block for NI 2532B as 1-Wire Quad 4x32 or 2-Wire Dual 4×32 Matrix Matrix Topology Without Column Protection Resistors
782385-13
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The TB-2646B provides the necessary routing to configure the PXI-2532B or PXIe-2532B PXI Matrix Switch Module as a 2-wire dual 4x32 or 1-wire quad 4x32 matrix. You can directly connect the TB-2646B 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-2646B also provides optional isolation resistors to protect the reed relays from capacitive loads.
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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
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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
- RS-232 to RS-485 2 Wire with LCD Display
Model 366
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FEATURES: DataSpy® Status Display; Implements Low Cost LAN; Supports 32 Users; Uses Single Twisted Pair; External DTE/DCE Switch; Programmable Contention; Selectable Termination. The Model 366 allows interfacing RS-232 based equipment with networks/equipment using RS-485.
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Product
REM-11115, 4-Channel, 2-Wire Analog Output Module for Remote I/O
784749-01
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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
Keysight Dual 4x8 Armature Matrix for 34980A
34931A
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The Keysight 34931A 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 configurations 64 2-wire cross-points Connections to the internal DMM Expandable via four 2-wire analog buses Relay counter Latching armature relays 300 V, 1 A switch; 2 A carry current
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Product
Toxic Gas Detector
SMC 4501-XX
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The SMC 4501-XX Detector monitors toxic gases such as Hydrogen Sulfide, Carbon Monoxide, Oxygen Deficiency, Chlorine Dioxide, and others. Utilizing 2-wire loop-powered technology, the 4501-XX requires less wiring, leading to better protection from wiring errors.
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Product
Keysight Dual/Quad 4x8 Reed Matrix for 34980A
34933A
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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
PXIe-2525, 64‐Channel, 2 A, Multibank, 2‐Wire PXI Multiplexer Switch Module
780587-25
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64‐Channel, 2 A, Multibank, 2‐Wire PXI Multiplexer Switch Module —The PXIe‑2525 is a high‐density PXI multiplexer switch module that is ideal for routing signals within automated test systems. It uses electromechanical relays to perform immediate switch operations in one of the following 2‑wire multiplexer configurations: 16 bank 4x1, octal 8x1, quad 16x1, dual 32x1, and 64x1. The PXIe‑2525 also features onboard relay counting for relay monitoring.
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Product
ANSI X3.28 to Modbus RTU Converter
Model 2399
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* Converts ANSI X3.28 commandslinto Modbus RTU packets.* New 32 Address Mode supports multi-channel Modbus Controllers like the Watlow MLS300.* Control Modbus RTU devices from any ASCII serial source.* Serial ports support RS-232 and 2-wire/4-wire RS-485 signals.* Includes serial baud rate conversion.* Internal logic is IEEE-488.2 compatible and uses SCPI commands for configurtion setup.* 2399 mounts on a DIN rail or on any flat panel.* Inexpensive way to maintain manufacturing equipment such as semiconductor fusion chambers, etc as the ANSI Controllers become obsolete.* Application Note AB23-3 describes how to use the 2399 to replace obsolete Watlow Controllers in the Axcelis/Fusion Gemini Asher.* 2399 Serial Keyboard Program lets you control and setup the 2399 and test the ANSI modes.* 239x Table Loader Program uploads ANSI Command Table entries from an Excel csv file.
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Product
16 Channel Multiplexer (2/4-wire) Module for 34970A/34972A
34902A
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The Keysight 34902A module for the 34970A/34972A Data Acquisition/Switch Unit employs reed relays to achieve scan rates up to 250 channels-per-second. Use this module for high-throughput automated test applications as well as high-speed data logging and monitoring tasks.
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Product
Emergency/Panic Button
ENVIROMUX-EBS
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Sends activation signal when button is pressed. For normally closed or normally open circuit connections. 2-wire interface. Screw terminal. Maximum cable length: 1,000 ft (305 m). Dimensions WxDxH: 1.7x2.9x4.6 in (43x74x117 mm). Regulatory approvals: RoHS.
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Product
Modbus or Laurel ASCII ProtocolSerial Output DIN Rail Transmitters
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Laureate TM Series serial output transmitters can be jumpered for two signal levels: RS232 or RS485. Two serial protocols are selectable in software: Modbus or Laurel's Custom ASCII.Modbus protocol operation is fully compliant with the Modbus Over Serial Line Specification V1.0 (2002) for 2-wire, half-duplex connection.
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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
Dining Isolation Amplifier
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Knick Elektronische Messgeräte GmbH & Co. KG.
To feed and Isolation of 2-wire transmitters / sensors or SMART transmitters with HART transmission. Working voltage up to 2500 V AC / DC. Available for hazardous and non-hazardous area.
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Product
Speed Sensor Intrinsically Safe
ST420
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Features• 2-wire, loop-powered 4-20 mA analog output• No user calibration – works right out of the box• Standard and custom measurement ranges available• Reverse-wiring protected• Works with Electro-Sensors magnetic pulser discs / wrapsRugged stainless steel M18x1 housing; UL listed, Intrinsically Safe (IS); Class I, Div I (C, D) Class II, Div I (E, F, G)
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Product
20 Channel Multiplexer (2/4-wire) Module for 34970A/34972A
34901A
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The Keysight 34901A module for the 34970A/34972A Data Acquisition/Switch Unit is the most versatile multiplexer for general purpose scanning. It combines dense, multi-function switching with 60 channel/second scan rates to address a broad spectrum of data acquisition applications.
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Product
16-Channel Multiplexer (2 / 4-Wire) Module for DAQ970A and DAQ973A
DAQM902A
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DAQM902A 16 Channel Multiplexer (2/4-wire) Module. Reed relays with high voltage switching of up to 300 V and scan speed up to 250 ch/s.
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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
PXI Serial Interface Module
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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
Interface Technology ProLine
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Knick Elektronische Messgeräte GmbH & Co. KG.
Isolation Amplifier for DC voltage and current measurement with galvanic isolation, active and passive standard signal isolation amplifier, supply isolation amplifier for supplying 2-wire sensors, transmitter for temperature and AC signals, isolating amplifiers for high voltages and shunt applications. T
