How to use Honeywell OELD intelligent junction box

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.