How should QC4, QC8 and QC12 be selected?
Select mainly by circuit count and cabinet space. QC4 provides four inputs and outputs for small panels, QC8 provides eight for venues and medium lighting panels, and QC12 provides twelve for schools, campuses and centralized multi-circuit control. QC8 has Ethernet, two RS485 ports and CAN, while QC4 and QC12 have Ethernet and one RS485 port.
What is the difference between RC, QC and QCL?
RC models focus on local RS485 bus integration with PLCs, HMIs, industrial computers and gateways. QC models combine Ethernet and RS485 for LAN, platform and third-party integration. QCL models combine 4G and RS485 for distributed sites or projects without fixed broadband.
Does the QC family support MQTT and secondary development?
Yes. QC models can use MQTT, TCP and UDP for LAN software, servers and project platforms. Protocol and interface documentation can be provided for the selected model so circuit control, inputs and field logic can be integrated into the application.
Can the controllers connect to PLCs, SCADA or a private platform?
Yes. RS485 can connect PLCs, HMIs, industrial gateways and SCADA, while Ethernet can connect servers, IoT platforms and private deployments. The controller handles circuit switching and field inputs; the platform can manage groups, schedules, permissions, logs and remote operations.
Which loads are suitable for latching relays?
They suit lighting circuits, power switching and applications that need the relay state to be held without continuously energizing the coil. Match lighting drivers, contactor coils and motor-related circuits to rated current, inrush and protection. High-power or high-inrush loads can be switched through a contactor controlled by the QC output.
Can wall switches, sensors and meters be connected?
Wall buttons, dry contacts and compatible digital signals can use the controller inputs for local operation alongside remote control. RS485 sensors and meters can connect through a controller, gateway or platform according to the interfaces, protocol and hardware or firmware capabilities of the selected model.
How can an existing lighting distribution panel be upgraded?
First list the circuits, load types, inrush characteristics, protective devices and wall-switch wiring, then select QC4, QC8 or QC12 by circuit count. Install the controller in the panel, connect circuits and local inputs, and configure networking, circuit names, groups, schedules and permissions. Energy meters or multi-circuit acquisition modules can be added when energy management is required.