The Ebyte E860-DTU series is an industrial LoRa wireless remote switch telemetry controller offering 1DI+1DO (1010) or 2DI+2DO (2020) 10A relay synchronization across 410-493MHz and 850-930MHz bands, delivering 5km (22dBm) or 10km (30dBm) point-to-point and point-to-multipoint wire-free actuation with sub-300ms latency, wide DC 8~28V power, DIN-rail mounting, and conformal coating.
Key Features
- Long-Range LoRa Wireless Switch Telemetry (Up to 10km): Powered by Semtech LoRa modulation technology with -148 dBm high receiver sensitivity, achieving reliable point-to-point and point-to-multipoint digital I/O synchronization over 5km (22dBm) or 10km (30dBm) line-of-sight without trenching or laying signal cables.
- Fast Sub-300ms Low-Latency Synchronization & Multiple Work Modes: Delivers rapid wireless response under 300ms with one-to-one bidirectional following, one-to-many broadcast, independent channel control, and one-key hardware pairing button.
- Heavy-Duty 10A High-Power Relay Outputs (10A 250VAC / 30VDC): Available in 1DI+1DO (Form A SPST) or 2DI+2DO (Form C SPDT) configurations, supporting dry contact / NPN digital inputs and directly switching solenoid valves, contactors, motors, and high-voltage alarms.
- Rugged Industrial Design & Conformal Coating Protection: Sprayed with military-grade conformal coating (anti-mold, anti-moisture, anti-salt spray), operating across -40 to +85 deg C industrial environments with DC 8~28V power supply and dual 35mm DIN-rail / screw mounting.
Core Specifications
| Parameter | Specification / Value |
|---|---|
| Wireless Modulation & Technology | Semtech LoRa Spread Spectrum Modulation |
| Operating Frequency Bands | 400SL Models: 410.125 ~ 493.125 MHz | 900SL Models: 850.125 ~ 930.125 MHz |
| RF Transmit Power & Sensitivity | 22dBm (Approx. 160mW) / 30dBm (1W Max) | Sensitivity: -148 dBm @ 2.4Kbps |
| Communication Distance | SL22 Models: 5 km | SL30 Models: 10 km (Clear Line of Sight, 5dBi Antenna) |
| Digital Input (DI) Channels | 1010 Models: 1 Channel | 2020 Models: 2 Channels (Dry Contact / NPN Input) |
| Digital Output (DO) Relays | 1010 Models: 1x Form A Relay | 2020 Models: 2x Form C Relay (10A 30VDC / 10A 250VAC) |
| Switch Response Latency | Within 300 ms Real-Time Response |
| Operating Voltage & Current | DC 8 ~ 28V (Nominal 12V/24V), Average Current: 70mA @ 12VDC |
| Antenna Interface | Standard SMA-K (Female Outer Thread with Internal Hole, 50 Ohm) |
| Mounting & Protection | Standard 35mm DIN-Rail and Screw Mount, Conformal Coating, -40 to +85 deg C |
Product Selection Guide
Notice for Selection: Choose between 1DI+1DO (1010 models) and 2DI+2DO (2020 models) based on your field switch channels; choose 400SL (410-493MHz / 433MHz) for Asia/China or 900SL (850-930MHz / 868/915MHz) for European CE RED and North American FCC ISM band compliance; select SL22 (22dBm / 5km) for standard distances or SL30 (30dBm / 10km) for ultra-long range penetration.
| Model SKU | I/O Channels | Frequency Band | RF Power | Range | Dimensions (L*W*H) | Weight |
|---|---|---|---|---|---|---|
| E860-DTU(1010-400SL22)-S | 1DI + 1DO (Relay) | 410.125 ~ 493.125 MHz | 22 dBm | 5 km | 92 * 54 * 32 mm | 72 g |
| E860-DTU(1010-400SL30)-S | 1DI + 1DO (Relay) | 410.125 ~ 493.125 MHz | 30 dBm | 10 km | 92 * 54 * 32 mm | 75 g |
| E860-DTU(2020-400SL22)-S | 2DI + 2DO (Relay) | 410.125 ~ 493.125 MHz | 22 dBm | 5 km | 100 * 90 * 40 mm | 120 g |
| E860-DTU(2020-400SL30)-S | 2DI + 2DO (Relay) | 410.125 ~ 493.125 MHz | 30 dBm | 10 km | 100 * 90 * 40 mm | 123 g |
| E860-DTU(1010-900SL22)-S | 1DI + 1DO (Relay) | 850.125 ~ 930.125 MHz | 22 dBm | 5 km | 92 * 54 * 32 mm | 72 g |
| E860-DTU(1010-900SL30)-S | 1DI + 1DO (Relay) | 850.125 ~ 930.125 MHz | 30 dBm | 10 km | 92 * 54 * 32 mm | 75 g |
| E860-DTU(2020-900SL22)-S | 2DI + 2DO (Relay) | 850.125 ~ 930.125 MHz | 22 dBm | 5 km | 100 * 90 * 40 mm | 120 g |
| E860-DTU(2020-900SL30)-S | 2DI + 2DO (Relay) | 850.125 ~ 930.125 MHz | 30 dBm | 10 km | 100 * 90 * 40 mm | 123 g |
Industrial Installation & Wiring
The E860-DTU series features a flame-retardant ABS industrial housing supporting both standard 35mm DIN-rail mounting and positioning screw hole mounting. Power connects to the DC 8~28V terminals (V+ and V-). Digital Inputs (DI) connect across DI signal terminals and the switch common terminal (GND), supporting dry contact switches, float switches, and NPN open-collector sensors. Digital Outputs (DO) provide heavy-duty 10A 250VAC / 30VDC relay contacts with Normally Open (NO), Normally Closed (NC), and Common (COM) terminals to directly drive contactor coils, pump motors, and alarm sirens. High-frequency RF transmission uses an external 50-ohm SMA-K antenna port. Intuitive front-panel LED indicators display DC power status, LINK connection, and real-time DI/DO channel activation.
Practical Application Scenarios
1. Remote Water Tower Level Interlock & Pump Station Control
In municipal water reservoirs, elevated tanks, and agricultural irrigation pump stations, running physical signal cables over mountains or private property is prohibitively expensive. Deploying an E860-DTU transmitter connected to a liquid level float switch allows instantaneous wireless triggering of the pump starter relay up to 10km away at the well pump house, automatically starting or stopping pumps without human intervention.
2. Industrial Valve Remote Actuation & Emergency Shutdown (ESD)
In chemical processing plants, fuel storage tank farms, and long-distance gas pipelines, emergency stop signals and limit switch feedback must bridge long spans without electrical conduit hazards. The E860-DTU transmits deterministic switch telemetry with sub-300ms latency, triggering emergency pneumatic valve closures wirelessly across vast facility grounds.
3. Factory Overhead Crane & Hoist Wireless Remote Control
Heavy overhead bridge cranes, metallurgical ladle cars, and material transfer carts operate across high-vibration manufacturing bays where umbilical cables frequently wear out. The E860-DTU provides a reliable LoRa wireless link immune to motor drive VFD interference, synchronizing pendant pushbutton commands directly to motor drive contactors.
4. Smart Mining Conveyor Belt Tear & Pull-Cord Safety Systems
Bulk material overland conveyor belts spanning several kilometers require emergency pull-cord switches and belt alignment detection. The E860-DTU enables wireless daisy-chained switch reporting back to the central control PLC, halting conveyor drives immediately upon safety interlock trip.
FAQ Section
1. How do I pair two E860-DTU units for point-to-point switch synchronization?
With both units powered on, press and hold the STATE/LINK button for 2 seconds on the Master device to enter pairing mode (the LINK LED will flash). Then press and hold the STATE/LINK button for 2 seconds on the Slave device. Within a few seconds, both LINK LEDs will turn solid, confirming successful wireless pairing and synchronous I/O linkage.
2. Can one transmitter control multiple receiver units (One-to-Many Mode)?
Yes. The E860-DTU series supports flexible one-to-many broadcast and independent channel mapping. A single Master DTU can synchronize its DI status to multiple Slave DTU relay outputs simultaneously across the entire RF coverage area.
3. What types of input signals are supported by the DI ports?
The DI ports natively support passive dry contacts (pushbuttons, mechanical limit switches, reed switches, relay contacts) as well as active NPN open-collector sensor outputs. Connecting the DI terminal to the GND terminal triggers an input state change.
4. How do I restore the E860-DTU to factory default settings?
Press and hold the front-panel STATE/LINK button for more than 6 seconds until the STATE indicator flashes rapidly. The device will reset all RF channels, encryption keys, and address mappings to default factory parameters.
