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Current Loops
See Also: Loop, HIL, Loop Testers
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PCI Express 8 Reed Relay Output
8012eS
The 8012eS PCI Express digital interface provides eight optically isolated inputs and eight Reed relay outputs (SPST). The isolated inputs are non-polarized and rated for 3-30 VDC. Optical isolation protects the PC and other sensitive equipment from the voltage spikes and ground loop currents that are common to industrial environments.
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PCI Express 8 Reed Relay Output
8012e
The 8012e Low Profile PCI Express digital interface provides eight optically isolated inputs and eight Reed relay outputs (SPST). The isolated inputs are non-polarized and rated for 3-30 VDC. Optical isolation protects the PC and other sensitive equipment from the voltage spikes and ground loop currents that are common to industrial environments.
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2-Port Serial Interface
APCI-7420-3
*RS232, RS422, RS485, 20 mA Current Loop (active, passive) with or without optical isolation*Modular structure through MX-modules*With or without optical isolation*Mode configuration free for each port*128-byte FIFO-buffer common interrupt*Automatic direction recognition for RS485*Transmission mode: asynchronous, full, half duplex
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Loop-Powered Digital Panel Meter
88-PRO
The 88-PRO Process Meter may be connected directly to a 4-20 mA, 10-50 mA or 1-5 mA current loop, with no need for additional power to the meter. This is because the meter is powered directly by the current loop, developing a maximum voltage drop of 2.5 V.
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Digital LOOP/PSC/LOAD Tester
2811 LP
Standard Electric Works Co., Ltd
● Microprocessor-controlled.● Displays and sound warning if external voltage present.● Displays mains voltage, scroll trough menus.● Checks wiring integrity (LEDs and display).● Single button operation.● Auto-off/auto-ranging.● Combined prospective short circuit current, PSC and LOOP tester.● Built-in carry case, test leads in separate pouch.● Loop test for L-E and L-N and PSC.● Voltage test L-N and L-E.● Enables analysis of constituent components in L-E and L-N loops giving resistance of earth, neutral wire, live wire and transformer winding.● Display can be customized for special orders.● 60Hz available on request.
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Current Loop Adapter
OP-1C
This adapter supports current loop communications.The kit incorporates a communications circuit with photo-coupler isolation and constant-current power supply of insulated type, thus realizing not only monitoring but also easy communications testing with passive or active current loop devices.
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PXI/PXIe Analog Output/Current Loop Simulator Module - 8 Channel
43-765-003
The 41/43-765-003 is an 8-channel Analog Output Module designed to meet the requirements of industrial control applications utilising current loops 4 – 20mA. It consists of up to four 16-bit, digital-to-analogue converters (DAC), capable of creating four current outputs each. Output current within 0mA - 4mA and 20mA - 24mA, give the ability to simulate error or extra signalling conditions. The ±24mA mode gives the ability to simulate either sourcing or sinking sensor.
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Downloading Multifunction Tester
ET4500
The new ET4500 tester carries out all the tests needed to verify the safety of electrical installations in domestic, commercial and industrial wiring installations in accordance with the latest regulations.
can be used to carry out 3 wire earth testing and has on board memory to store and download all installation test results for documentation.
Everything about the new ET Series has been designed to save time and make testing easier.Fast, reliable high current and non-trip loop testing comes as standard together with a high level of input protection and a CAT IV safety rating .Supplied with a full range of accessories.
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- RS-232 to Current Loop Converter
Model 65A
FEATURES: Active/Passive Loops; 20 or 60 mA. Operation; DC To 19.2 KBPS; Half/Full Duplex; Optically Isolated; DTE/DCE Selectable. The Model 65A is a small, versatile, RS-232 to Current Loop Converters for use with teletypes or computers providing local terminal input via a 20mA. (or 60 ma.) current loop. The Model 65 includes a wall mounted transformer and internal power supply circuitry.
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PCI Express 16 Reed Relay Output
8004e
The 8004e PCI Express digital I/O interface provides 16 optically isolated inputs and 16 Reed relay outputs. The isolated inputs protect the PC and other sensitive equipment from the voltage spikes and ground loop currents that are common to industrial environments. The outputs provide high quality, long-life, dry contact switch closures suitable for low-current applications.
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4-20mA Current Loop USB Data Logger
EL-USB-4
This data logger measures and stores up to 32,000 current loop readings over flashing red and green LEDs. The data logger features a pair of screw terminals and is supplied complete with a a 4-20mA d.c. measurement range. The user can easily set up the logging rate and start time, and download the stored data by plugging the module straight into a PCs USB port and running the purpose designed software under Windows 2000, XP or Vista
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12 D/A Outputs (±10 VDC or ±25 mA)
DA1
The DA1 module features 12 independent D/A output channels with a full-scale range of ±10 VDC at ± 25 mA (max). The DA1 provides either voltage or current control loop modes that are programmable for the particular application. The DA1 module also offers external trigger/synchronization signal (RS422/485) capability, which provides/accepts a trigger signal to/from other module(s).
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Analog & Digital I/O Modules
USB analog and digital I/O modules are a complete family of data acquisition modules for use in process control systems. The analog input modules can measure process signals such as DC voltage, thermocouples, 4-20mA current loops, discrete contact closures.
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PXI Analog Output / Current Loop Simulators
These modules are aimed at simulating industrial control transceivers, utilizing 4–20mA current loops. The modules include built-in relays for shorts and opens functionality enabling fault insertion testing on every channel and also enable slew rates to be programmed so that different sensors can be effectively mimicked.
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Industrial 4-20mA Driver
Analog Devices portfolio of leading industrial d/a converters and drivers addresses the challenges of enhancing system accuracy, reliability, and overall functionality while reducing form factor and power dissipation. The products provide a range of programmable output ranges from standard 4–20 mA for current loop communication to ±10 V for actuator control. They simplify industrial system design by offering considerable control functionality and advanced on-chip diagnostics to maximize system up time. ADI industrial converters also eliminate the need for costly calibration routines needed by some traditional discrete architectures.
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Opto-Isolated Current Loop Signal
4029
SPECTEC Innovative Sensor Solutions
SPECTEC's Model 4029 digital opto-isolated current loop signal conditioner prevents ground loops and interrupts any galvanic signals riding on magnetic speed sensor's output signal.. This signal conditioner converts magnetic, variable reluctance and inductive sensors' sinusoidal signals into a 4-20 mA output suitable for interfacing with process control units, dataloggers, flow controllers, and computers.
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4-port Serial Interface, Modular, With/without Optical Isolation, 3.3V/5V, With 9-pin Connectors
APCI-7500-3/4C
*This model has 4x 9-pin D-Sub male connectors on 2 brackets*RS232, RS422, RS485, 20 mA Current Loop*Modular structure through SI modules*With or without optical isolation*Mode configuration free for each port*128-byte FIFO-buffer, common interrupt*Transfer rate programmable up to 115,200 Baud*Option: up to 1 MBaud for RS485 and RS422*Automatic direction recognition for RS48*Mode: configurable RS232, RS422, RS485, 20 mA Current Loop (active, passive) with or without isolation (SI modules)
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PXI Analog Output/Current Loop Simulator Module - 12 Channel
41-765-002
The 41/43-765-002 is a 12-channel Analog Output Module designed to meet the requirements of industrial control applications utilizing current loops 4 – 20mA. It consists of up to four 16-bit, digital-to-analogue converters (DAC), capable of creating four current outputs each. Output current within 0mA - 4mA and 20mA - 24mA, give the ability to simulate error or extra signaling conditions. The ±24mA mode gives the ability to simulate either sourcing or sinking sensor.
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Microwave Moisture Meter
RX-95
The system works based on the absorption of microwave energy by water molecules contained inthe x-rayed material. It is a non-contact, non-destructive method of instant measurement of water content - used for materials such as coal, flour, grain, cement, seeds, sugar, etc. Thanks to high measurement sensitivity (resolution greater than 0.01% of water content by weight), short measurement time (about 5 times/sec.) and repeatability of measurement - the system is suitable for continuous measurement of material moisture, e.g. on conveyor belts and its recording on a PC or using a 4-20 mA current loop.
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Remote Indicators
ABB field indicators provide a convenient way to access the field instruments data when they are located in remote or difficult to access areas. Powered directly from the 4-20 mA current loop, they require minimal effort to setup.
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PXI Analog Output/Current Loop Simulator Module - 4 Channel
41-765-004
The 41/43-765-004 is an 4-channel Analog Output Module designed to meet the requirements of industrial control applications utilizing current loops 4 – 20mA. It consists of up to four 16-bit, digital-to-analogue converters (DAC), capable of creating four current outputs each. Output current within 0mA - 4mA and 20mA - 24mA, give the ability to simulate error or extra signaling conditions. The ±24mA mode gives the ability to simulate either sourcing or sinking sensor.
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Temperature Transmitter
T4111
Transducer is designed for temperature measurement at C or F by means of an externaltemperature probe with Pt1000 sensor. Measured temperature is converted to linearized unified signal 4-20 mA. Measured values are displayed on LCD display. It is possible to switch OFF theLCD at all. Current loop has two-wire connection and requires power from evaluation device.
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4-Port Serial Interface, Modular, With/Without Optical Isolation, 3.3V
CPCI-7500
*This Model has a 37-pin D-Sub male connector*RS232, RS422, RS485, 20 mA Current Loop*Modular structure through SI modules*With or without optical isolation*Mode configuration free for each port*128-byte FIFO-buffer, common interrupt*Transfer rate programmable up to 115,200 Baud*Option: up to 1 MBaud for RS485 and RS422*Automatic direction recognition for RS48*Mode: configurable RS232, RS422, RS485, 20 mA Current Loop (active, passive) with or without isolation (SI modules)*Transmission mode asynchronous, full, half duplex*Transfer rate: progr. up to 115.2 kBaud up to 1 MBaud on request*Protocol: 5, 6, 7 or 8-bit character 1, 1? or 2 stop bits*Parity: even, odd, none, mark or space*Interrupt lines: automatic through BIOS
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PXI/PXIe Analog Output/Current Loop Simulator Module - 16 Channel
43-765-001
The 41/43-765-001 is a PXI/PXIe 16-channel Analog Output Module designed to meet the requirements of industrial control applications utilising current loops 4 – 20mA. It consists of up to four 16-bit, digital-to-analogue converters (DAC), capable of creating four current outputs each. Output current within 0mA - 4mA and 20mA - 24mA, give the ability to simulate error or extra signalling conditions. The ±24mA mode gives the ability to simulate either sourcing or sinking sensor.
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Loop-Powered Transmitters and Drivers
4-20mA
Loop-Powered Transmitters convert the output from proximity probes, seismic sensors, into a 4-20mA DC current, which is proportional to the input being measured. The transmitter converts the displacement or vibration signal to DC voltage and/or current for a DCS or PLC system. They control a 4-20mA current loop for a specified vibration range (ex. 0-5 mils peak-to-peak). The transmitters have a two-wire hook-up, powered solely by the loop current and have a power supply range of 15 to 36 volts.
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AC Power Sources, Frequency Converter
MAC-01, -02, -03
For reliability, all models of the Titan AC Power Sources/Frequency Converters are fully current limit protected against either continuous or transient short circuit or overload conditions. When an overcurrent condition exists, the internal current control loop overrides the voltage control loop and scales back the sinewave drive until it sees a safe output current level.
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4-20mA Current Loop D/A Converters
ADI integrated solutions combine both the D/A converter and driver in one chip to provide the required output directly from the digital domain. Analog Devices’ portfolio of leading industrial D/A converters and drivers provides a range of programmable output ranges from standard 4 mA to 20 mA for current loop communication to ±10 V for actuator control. ADI industrial converters offer considerable control functionality and advanced on-chip diagnostics to maximize system uptime, as well as eliminate the need for costly calibration routines needed by some traditional discrete architectures.
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Current Loop 20 MA Constant Current SI-module With Optical Isolation
MXTTY
Current loop 20 mA constant current (active, passive) SI-module with optical isolation.
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Current Loop Data Loggers
This data logger can measure and store 4~20mA DC current readings automatically. The professional applications can be provided by the PC software DGraphTM. Logger status, alarm indication and low battery indication are via flashing red/green LED and yellow LED. The button on housing can be used to start logging, or confirm and clear LED alarm when LED alarm is hold status.
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PCI 16 Reed Relay Output / 16 Isolated Input Digital Interface (10-30V)
8004H
Optimized for sensing up to 24V inputs, the 8004H PCI digital I/O interface provides 16 optically isolated inputs and 16 Reed relay outputs. The inputs protect the computer equipment from spikes and ground loop current that can be generated in industrial environments, while the outputs provide high quality, long-life, low-current (10 Watt maximum), dry contact switch closures. The relays are normally open, and close when energized.
