Zhenming Electronics
RS485 relay controller

ZMRL QLR Series Network Relay Controller

RS485 relay controller series covering 4, 6, 8, 12, 16, 24 and 32-channel output control for building lighting, campus cabinets, exhibition halls and centralized equipment switching.

ZMRL QLR Series Network Relay Controller product image
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Tax-inclusive reference prices in CNY. Negotiable; the quotation reflects the selected configuration, quantity and delivery requirements. All products carry a 3-year warranty.

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For a complete system, include the power supply, sensors, communication access and platform deployment in your enquiry.

Product Positioning

RS485 relay controller series covering 4, 6, 8, 12, 16, 24 and 32-channel output control for building lighting, campus cabinets, exhibition halls and centralized equipment switching.

Capability 014, 6, 8, 12, 16, 24 and 32-channel output options
Capability 0212V power supply and 10A 240V AC relays
Capability 03RS485 Modbus RTU communication
Capability 04DIN-rail installation for small boxes and centralized control cabinets

Typical Applications

The page is written for engineering companies, system integrators, device manufacturers and B2B project procurement teams.

Cinema lightingExhibition hallsParks and street lightingCampuses and hospitalsControl cabinets and remote switching

Selection Notes for B2B Projects

Control ObjectPlan the product by lighting circuit, pump, fan, cabinet output or equipment switching object instead of only by channel count.
Protocol and PlatformCheck whether the project needs RS485, Ethernet, LTE(4G), MQTT, Modbus, grouped control, schedules, logs or private platform deployment.
Circuit PlanningSeparate high-power, inductive and frequently switched loads into clear circuits and match controller selection with the cabinet design.

Integration and Deployment

Circuit ObjectsMap each output to a named lighting, pump, fan, valve, cabinet or equipment circuit and retain a clear control boundary.
Local OperationUse dry-contact inputs, wall panels, schedules or supported local rules for field operation when the selected model provides them.
Network OperationsUse the communication interfaces of the selected model for status, remote control, action records and multi-site management.
Electrical CoordinationCoordinate relay loads, contactors, protection, cabinet wiring and manual override with the electrical design.

Protocol and Lighting Strategy Notes

Relay controller projects can be combined with DMX512 lighting control, sunrise and sunset schedules, Modbus integration, MQTT access, platform management and operation logs.

DMX512Sunrise sunset schedulesModbusMQTTLoad selectionOperation logsSmart lightingPrivate deployment

Remote Device Intercontrol

Supported models and firmware can map a remote input, sensor or business event to controller outputs at another site for one-to-one or one-to-many linkage. Applications include water towers and pumps, parking counts, warehouse alarms, irrigation and chain-store equipment.

Selection and system combinations

Select QLR controllers by channels and hardware configuration. Use the chosen model’s supply, output and communications specifications before comparing other 4G or Ethernet ranges.

Technical specifications and model data

Series modelsZMRL0410-QLR4, ZMRL0610-QLR6, ZMRL0810-QLR8, ZMRL1210-QLR12, ZMRL1600-QLR16, ZMRL2400-QLR24, ZMRL3210-QLR32
Output channels4, 6, 8, 12, 16, 24 or 32 independent dry-contact outputs for 220V circuits
Input portsQLR4/6/8/12: 4/6/8/12 local inputs respectively, plus one RS485 input; QLR16/24/32: one RS485 input
Relay specification10A 240V AC
Supply12V; standard 12V/1A supply
Mounting35mm DIN rail
Enclosure dimensionsQLR4: 107×110×60mm; QLR6/QLR8: 160×110×60mm; QLR12/QLR16: 200×115×60mm; QLR24: 250×110×60mm; QLR32: 300×110×60mm

Product integration and applications

01

RS485 outputs for dense control cabinets

QLR controllers provide 4, 6, 8, 12, 16, 24 or 32 independent relay outputs with the 10A 240VAC relay specification. Smaller units fit local equipment boxes; larger units support floor, cinema, exhibition or public-area cabinets. An RS485 master organizes operations, with each circuit identified by cabinet and channel.

ZMRL3210-QLR32 panel with 32 RS485-controlled relay outputs
ZMRL3210-QLR32 panel with 32 RS485-controlled relay outputs
02

Plan inputs separately from outputs

QLR4, QLR6, QLR8 and QLR12 include corresponding local input channels and RS485. The published port data for QLR16, QLR24 and QLR32 specifies the RS485 input path. Do not assume 32 outputs also means 32 local inputs. A separate digital input module can provide the required buttons, limits or fault contacts.

03

Combine with PLCs, panels and energy acquisition

Use QLR as the output layer of a PLC, industrial PC, HMI or gateway system through RS485 Modbus RTU. A touch panel provides local scenes, acquisition modules provide contact feedback, and meters add circuit energy data. The supervisory platform handles groups and records. Existing systems can be upgraded cabinet by cabinet.

Selection questions

Does QLR32 include 32 button inputs?

The published QLR32 port data specifies the RS485 input path. QLR4/6/8/12 have corresponding local inputs. Count field inputs separately from relay outputs.

Is QLR a standalone 4G controller?

QLR is intended for RS485 integration. Use a gateway or a controller family with 4G communication when remote cellular access is required.

Selection FAQ

What lighting or control projects are suitable?These relay controllers are used for smart lighting, control cabinets, equipment switching, parks, streets, campuses, hospitals, cinemas and exhibition halls.
How should relay channels be selected?Channel count should follow the number of lighting circuits, equipment groups, cabinet layout and expansion margin.
Can the controller support remote operation?Depending on the model, RS485, Ethernet, 4G, MQTT, TCP, UDP or platform access can support remote control and status viewing.

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