How to use Honeywell OELD intelligent junction box

How to use Honeywell OELD intelligent junction box

Security Warning and Information

The installation must comply with the standards recognized by relevant national authoritative institutions, and reference should be made to EN 60079-14 and EN 60079-29-2 in the European region.

It is strictly prohibited to open the casing when powered on or when there may be explosive atmospheres present.

Operators need to be aware of the measures to be taken when the gas concentration exceeds the alarm level, and must not modify the product structure, otherwise it may render critical safety and certification requirements ineffective.

Only trained personnel are allowed to carry out internal operations of the product. Its measurement function has not obtained ATEX certification, and it is not allowed to rely on the backlight status indication of the OELD display screen for safety related operations. The equipment must not operate in an environment with an oxygen content exceeding 21%.

Special safety conditions for use (increased safety Ex e version)

Each terminal can be connected to a maximum of one single or multiple wires on either side, unless multiple wires are connected in an appropriate manner.

The insulation layer of the wire connected to the terminal should be suitable for the corresponding voltage and extend within 1mm of the terminal throat.

All used and unused terminal screws should be tightened to between 0.5Nm and 0.6Nm, and terminals can only be installed and wired using cables recommended by IECEx KEM 10.0093U.

Disposal and Environmental Protection

The product should be disposed of in accordance with local regulations, including materials such as the shell (aluminum alloy or 316 stainless steel), lid (aluminum alloy or 316 stainless steel, glass).

The product must be disposed of through appropriate WEEE disposal facilities and cannot be treated as general industrial or household waste.

Product Overview

Basic Introduction

OELD is a certified junction box for hazardous locations, suitable for detectors with 4-20mA output, and can be used in conjunction with Searchpoint Optima Plus or Searchline Excel series gas detectors.

Provide local visual status indication and Bluetooth low-energy interface, which can be configured and maintained through Bluetooth enabled mobile devices, certified by ATEX and IECEx, suitable for Zone 1 (gas) or Zone 21 (dust) hazardous areas, and the explosion-proof version also has cULus certification, suitable for Class I Zone 1 or Class II Zone 1.

There are 5 entrances (M25 or 3/4 "NPT depending on the version) and 3 certified plugs, while the Ex e version of the OELD only has 5 M25x1.5 entrances.

Structure and function

There are two grounding connection points and an electronic module with two pluggable terminal blocks inside the shell, used to connect the field and detector wiring.

Featuring four-color backlighting (green, yellow, red, blue) and a customized 7-segment liquid crystal display (LCD), different backlight colors represent different states, such as green for normal operation or warning, red for alarm, etc.

Options

Including pipeline installation kit (1226A0358), which can install OELD on pipelines with diameters ranging from 2 "to 6" (50 to 150mm); Ceiling installation bracket kit (1226A0355), used for ceiling installation; Sun visor (94000-A-1006), made of 316 stainless steel, can protect OELD and related detectors from direct sunlight.

Installation related

Site selection and positioning

The placement of gas detectors should follow the recommendations of gas diffusion experts, process equipment experts, safety personnel, and engineering personnel, and record the protocol for determining the detector location.

Installation designers should refer to IEC/EN 60079-29-2 and other national practice standards, as well as the site selection recommendations for specific locations in the gas detector technical manual.

Mechanical Installation

OELD can be installed in various ways through integrated mounting pads, such as on flat walls Unistrut ®  On the bracket, use the optional pipe installation kit to install on the pipeline or utility pole, or use the ceiling installation bracket kit to install on the ceiling.

When installing, it is necessary to consider the correct direction of the detector, ensure that the installation bolts are fully tightened, and use appropriate locking washers.

electrical installation

The detector can be installed directly or remotely to the OELD, and some detectors have corresponding junction boxes for remote installation.

The installation steps include removing the cover, taking out the electronic module, installing cable glands or conduit fittings, installing detectors (with different installation methods for different entrance versions), sealing unused cable entrances, making electrical connections, reinstalling the display module and cover, etc.

Electrical connection

Terminal block definition

Terminal block 1 (TB1) and terminal block 2 (TB2) have different markings, colors, and functions for each terminal. For example, terminal 1 of TB1 is - V (black) and is used for auxiliary power supply.

The increased safety (Ex e) version uses terminal blocks of specific manufacturers and types, while the explosion-proof (Ex d) version is black and the increased safety version is green. They must not be mixed, otherwise the product certification will be invalidated.

Wiring diagram

Provided OELD and Searchpoint Optima Plus、Searchline Excel、Searchline Excel Cross-Duct（XD） Wait for the wiring diagram of the detector, as well as the connection method of the detector with the current sink and current source configuration.

Grounding connections should avoid grounding loops. The OELD has two internal grounding points, and the on-site cable shielding layer should be connected to the instrument grounding in the control room. The internal and external grounding points of the OELD have corresponding specifications and connection requirements.

Power supply and cables

The OELD requires a voltage supply of 18-32Vdc (nominal 24Vdc) with a maximum power consumption of 2W, taking into account the voltage drop caused by cable resistance to ensure the minimum required supply voltage at the detector.

The cable should be suitable for hazardous area classification and comply with relevant regulations. It is recommended to use industrial grade shielded field cables. The allowable wire size for terminals is 0.2-2.5mm ² (24-12AWG), and the rated wire temperature should be greater than 80 ° C. The terminal tightening torque should be 0.5Nm to 0.6Nm.

Configuration

Configurable parameters

Including local alarm indication threshold (can be set between 5 and 65% FSD, default 20% FSD), mA input level setting (to match the detector's mA output curve), and OELD universal display settings (such as full-scale range, measurement unit, gas name, etc.).

configuration process

Configure by running the OELD App on a mobile device, including steps such as launching the application, logging in, searching for nearby OELD units, selecting and confirming connections, etc.

After completing the configuration or changing the settings, the configuration should be read back and verified to ensure that the changes are correct.

Operation

Startup and self-test

The startup and self-test sequence takes about 60 seconds, during which display testing, backlight testing, internal hardware and memory checks, etc. will be performed. After completion, it will enter normal operating mode.

normal operation

During normal operation, the LCD backlight indicates the detector status based on the 4-20mA output of the detector, and different current ranges correspond to different backlight colors and flashing states.

The display screen displays gas concentration information (in graphical and numerical form) and other information during normal operation. At low temperatures, the refresh rate of the display screen will automatically decrease. At extremely low temperatures, the screen clarity may decrease, but it can return to normal after the temperature is restored.

communication model

Equipped with Bluetooth Low Energy (BLE) interface, it supports non-invasive connection with mobile devices running the OELD App, and can also communicate with specific detectors through RS-485 interface.

Honeywell Analytics SHC-1 handheld interrogator and SHC protection device can also be used to connect with relevant detectors, but attention should be paid to relevant warnings and precautions.

OELD Mobile Application

Installation and operation

The OELD mobile application can run on Android 4.3 (Jelly Bean) or higher operating systems that support Bluetooth Low Energy (BLE) and can be downloaded and installed from the Google Play Store.

The first launch requires reading the End User License Agreement, logging in or registering an account. Registration requires an Internet connection and at least one OELD device's QR code.

Connection and Configuration

Can connect to OELD devices that have already been registered to the user account. The connection steps include clicking on relevant buttons on the main screen of the application, selecting the device, scanning the QR code (if access to restricted devices is required), confirming the connection, etc.

Multiple parameters of the OELD device can be configured, as well as parameters of detectors such as Searchpoint Optima Plus and Searchline Excel connected to the OELD, and calibration operations can also be performed (specific detectors).

Maintenance and troubleshooting

maintenance

Regularly inspect the OELD and cables for physical damage, clean the glass windows with a damp cloth, and do not use solvents or abrasive cleaners. The OELD has no user repairable parts.

It is recommended to check the configuration and operation of the equipment at least once a year, and the gas detector connected to the OELD should be checked and calibrated according to its operating instructions.

The replacement of the display module requires following specific steps, including power-off, removing the cover and electronic module, replacing the module, etc. After replacement, it needs to be reconfigured.

Malfunctions and warnings

Different display messages and codes correspond to different types of faults or warnings, such as "Over Rang" (W-01) indicating an over range warning, "Comm Err" (F-01) indicating an internal communication fault, etc., with corresponding remedial measures.

Specifications and ordering information

specifications

The material is marine grade aluminum alloy or 316 stainless steel (with 5-coated painted surface treatment), and the weight varies depending on the material. The size is 159x197x114mm, and the number and type of cable entrances vary depending on the version. There are corresponding terminals, storage and working temperatures, humidity, display information, visual indicators, power supply, interfaces, protection levels, and certifications.

ordering information

We provide models and descriptions of different versions of OELD smart junction boxes and related accessories (such as universal service kits, terminal block groups, plugs, installation kits, sunshades, etc.). We warn that it is necessary to obtain service kits that match the OELD version, otherwise the product certification will be invalidated.

Certification and Warranty

Certification and Approval

Including EU conformity declaration, hazardous area certification (such as ATEX, IECEx, cULus, Inmetro, etc.), performance certification, wireless certification, etc. Different certifications have corresponding certificate numbers and scope of application.

Warranty Summary

Honeywell Analytics guarantees that the OELD will be free of component and process defects, repairable or replaceable under correct use for a period of 24 months from the date of shipment, excluding consumables, normal wear and tear, accidental damage, etc. Claims must be made within the warranty period.