0-20 mA to fibre converter for analog position monitoring

28 August 2002 Opto-Electronics

The LL122 is an optical fibre analog current interface used in many process and industrial control systems. Available from Advanced Digital Devices, the interface converts a 0-20 mA signal to an optical signal which is sent through the fibre-optic cable. Another LL122 converter at the remote end re-converts the light signal back into a 0-20 mA electrical signal.

These circuits are short-circuit protected and are designed to tolerate the abuse often found in the industrial arena. The units are provided with built-in mains power supplies and are housed in grey powder-coated metal boxes which offer protection in harsh industrial environments. The units serve to extend the range of a 0-20 mA control signals via an opto-decoupler to prevent damage to equipment by induced lightning surges.

The LL122 is suited for 850 nm multimode as standard. Optional is 1300 nm multimode/singlemode. ST connectors are industry standard with multimode, and (optional) SC for multimode and FC for singlemode. The units are suitable for use in environmental conditions: 0-45°C and 0-95% noncondensing humidity.

For more information: ADD South Africa, 011 314 3150, [email protected]

Further reading:

Mouser broadens its LED lineup
Opto-Electronics
Mouser has broadened its LED lineup with diverse solutions designed to support lighting, medical, and smart home applications.

Read more...

---

High-quality optoelectronics components
Opto-Electronics
LEDs make up the bulk of Lite-On’s product range, and all popular types are manufactured from the ubiquitous round LEDs designed for through-hole mounting to state-of-the-art structures, integrated with programmable control systems.

Read more...

---

NTC thermistors for laser diode temperature measurement
Electrocomp Opto-Electronics
These bondable NTC thermistors can be mounted with Au wire bonding inside the package for highly accurate temperature detection of laser diodes used for optical communication.

Read more...

---

Touch screen enables wise data visualisation
Rugged Interconnect Technologies Opto-Electronics
ADLINK offers comprehensive industrial-grade touch monitors and smart panels with in-house value-added customisation.

Read more...

---

Upgraded GUIs on STM32 microcontrollers
Altron Arrow Opto-Electronics
TouchGFX has now been upgraded to version 4.22, which sees many new features to aid developers with their user experience.

Read more...

---

Ultrabright chip LEDs
Avnet Abacus Opto-Electronics
Vishay’s range of high-reliability ultrabright chip LEDs feature a tiny footprint with excellent efficiency, and are available in two sizes, SMD 0603 and 0402.

Read more...

---

Efficient industrial LED lighting systems
Radél Opto-Electronics
icotek produces a range of smart lighting solutions for control panels, machinery and server racks, to provide effective lighting in various applications.

Read more...

---

LIDAR filters
Editor's Choice Opto-Electronics
LIDAR filters must be designed with the specific application and sensor type in mind to maximise signal-to-noise ratio.

Read more...

---

New UHF RFID increases picking efficiency
Brady Corporation Opto-Electronics
Brady’s new LED UHF RFID label and reader solution is optimised to increase picking efficiency, as it is now possible to pinpoint the location of assets with greater accuracy.

Read more...

---

Battle germs with UV-C LEDs
CST Electronics Opto-Electronics
LITEON provides compact LED solutions for ultraviolet-C applications that can battle germs and viruses by deactivating the reproduction process of microorganisms.

Read more...

---