In many industrial digitalization projects, the biggest problem is not a lack of equipment.
It is that there are too many devices, too many protocols, and too many distributed sites — while most existing equipment does not actually need to be replaced.
One meter may communicate via Modbus RTU.
Another system may use BACnet.
Power equipment may rely on IEC104.
Other devices may use DL/T645, Modbus TCP, or legacy communication interfaces.
If every new protocol requires additional development, and every new deployment requires engineers to spend days on site, the real cost starts shifting away from hardware.
It becomes the cost of:
integration, commissioning, troubleshooting, and long-term maintenance.
That is where many IIoT projects become unnecessarily complicated.
One reality of industrial digitalization is simple:
You cannot replace every legacy device just to make it connected.
Many PLCs, meters, instruments, HVAC controllers, and energy devices are still perfectly functional.
The challenge is that they communicate through different industrial protocols.
Instead of replacing these devices, the BL120ML can act as a connectivity layer between field equipment and upper-level systems.
On the downlink side, it supports:
Modbus RTU, Modbus TCP, IEC104, DL/T645, BACnet/IP and BACnet MS/TP.
On the uplink side, it supports Modbus RTU and Modbus TCP.
For small and medium-sized data acquisition projects, this can allow customers to keep existing field equipment rather than redesigning the entire system simply for connectivity.
Installing an industrial gateway is only the beginning.
The real challenge often appears months later.
What happens when parameters need to be changed?
What if firmware needs to be upgraded?
What if something stops communicating?
Does an engineer need to travel to the site every time?
When equipment is installed inside factories, energy facilities, pump stations, building plant rooms, or remote locations, even a minor maintenance task can create significant labor, travel, and downtime costs.
The BL120ML supports remote configuration and remote firmware upgrades. It can also report information such as CPU usage, memory usage, disk usage, Ethernet devices, serial devices and 4G signal status, while hardware and software watchdogs are designed into the system.
For the customer, the real value is not simply “another feature.”
The value is:
One less site visit. One less unnecessary shutdown. Several fewer hours spent troubleshooting.
Another issue that is often underestimated in industrial projects is connectivity.
The network will not always be available.
Ethernet connections can fail.
Some locations have no fixed broadband infrastructure.
Remote installations may depend entirely on cellular communication.
The BL120ML family provides different Ethernet, 4G and Wi-Fi connectivity options. The device can prioritize wired Internet access and switch to 4G when the wired connection is unavailable, while OpenVPN is also supported.
Depending on the application, the series includes standard, 4G, 4G + GPS, and Wi-Fi configurations.
The important question is therefore not simply:
“Does the gateway support 4G?”
The better question is:
When the network condition changes, will your data acquisition system keep working?
Many devices work perfectly during a demo.
The real test begins after they enter an industrial environment.
Temperature variation, electrical transients, electrostatic discharge, vibration and unstable power conditions are part of everyday industrial operation.
The BL120ML supports a DC 9–36V power input, while its Ethernet and serial interfaces include ESD and EFT protection. The datasheet also lists IEC 61000-4-2, IEC 61000-4-4 and IEC 61000-4-5 Level 3 requirements, IEC60068-2-6 vibration testing, and an operating temperature range of -40°C to 85°C.
Because the goal of Industrial IoT is not:
“Connect the equipment successfully once.”
It is:
Keep it connected for years.
Many industrial projects do not require a huge, expensive and overly complicated IIoT architecture.
What they may actually need is much simpler:
Keep the existing equipment. Collect data from different field devices. Connect it to the existing supervisory system. Reduce on-site maintenance. Maintain connectivity when network conditions change.
That is what an industrial edge gateway should ultimately help solve.
The value of technology should not be measured by how many pages are in the datasheet.
It should be measured by:
How many problems it removes for the customer.
