Is there an easier solution for complicated wiring during instrument commissioning?

Many people think instrument commissioning is difficult due to lack of operational proficiency. However, during on-site practical use, the real problem is often not the operation itself — the tools simply fail to establish communication.

First of all, the connection setup is overly complicated. HART communication signals are superimposed on the 4–20mA current loop. Ordinary computers cannot recognize such signals directly; a dedicated HART interface device is required for modulation and demodulation to build a communication link.

Second, on-site setup incurs high extra costs. A complete commissioning job usually requires extra spare parts: a separate 24V power supply, loop resistance, communication adapter, and various connecting cables. Besides, in many field conditions, instrument data cannot be read or diagnosed remotely, forcing technicians to rely on handheld communicators or disassemble instruments on-site, resulting in low work efficiency.

The root cause: there is no standardized on-site access method for HART communication, so commissioning relies on temporarily assembled wiring loops.

Improving work efficiency is not about cutting single operating steps, but standardizing the entire communication link. An ideal solution should satisfy the following requirements:

In short, users can start commissioning immediately without building auxiliary circuits in advance.

The Norhen HART Modem acts as a dedicated bridge and signal converter for HART communication. It enables direct access to HART signals without assembling multiple external auxiliary devices.

This all-in-one design integrates built-in 24V power supply and loop resistance, eliminating the need for extra accessories to stabilize communication. Technicians can connect the modem to PCs or Android mobile phones via USB or Bluetooth to read parameters, configure ranges and run diagnostic tests, replacing bulky handheld communicators and frequent wiring disassembly.

The biggest pain point of HART instrument commissioning is never complicated parameter setup, but unstable connection and inconsistent field environments. When HART communication shifts from makeshift temporary wiring to standardized plug-and-play access, most repetitive troubleshooting work on site can be drastically reduced.