⚡ Zigbee Inching Relay Module DC4 — 4-Channel Dry Contact Switch
A 4-channel Zigbee dry contact relay module with inching (momentary), self-locking, and interlock modes. Four independent relay outputs let you control up to 4 separate devices from one compact board — gates, garages, locks, lights, pumps, and more. Adjustable inching time from 0.5 to 60 seconds. Works with eWeLink, Tuya/Smart Life, and Philips Hue Bridge. Zigbee mesh router + 433MHz RF remote.
🔀 Choose Your Variant
⚡ Key Features
- 4-Channel Dry Contact Relay — four independent relay outputs (NO/COM/NC each); control up to 4 separate devices from one module
- Inching Mode (Adjustable 0.5–60s) — relay closes for a configurable duration then auto-opens; perfect for gate motors, garage doors, locks, and timed triggers
- Self-Locking Mode — relay stays on/off until toggled; for lights, pumps, irrigation valves, and sustained control
- Interlock Mode — when one relay activates, the others deactivate; ideal for motor direction control, multi-zone selection, or mutually exclusive outputs
- Zigbee 3.0 Router — connects to your Zigbee hub and simultaneously strengthens your mesh network by acting as a repeater
- 433MHz RF Remote — pair with RF key fobs for local physical control; great for family members who don’t use the app
- Dual App Support — eWeLink and Tuya/Smart Life; also works with Philips Hue Bridge and Zigbee2MQTT/ZHA (Home Assistant)
- Wide Voltage Input — 5–32V DC or 90–260V AC (powers the board only; relay outputs are dry contacts)
- Voice Control — Alexa, Google Assistant via eWeLink or Tuya
All 4 relay outputs are dry contacts (NO/COM/NC). The power input only powers the circuit board. Connect each relay’s contacts to the trigger terminals of your gate motor, lock, or external circuit.
🏠 What Can You Control?
Full Property Access
Channel 1: Pedestrian gate. Channel 2: Driveway gate. Channel 3: Garage door. Channel 4: Front door lock. One module controls your entire property entrance from a single app.
Irrigation Zones
Connect each channel to an irrigation solenoid valve. In self-locking mode, turn zones on/off independently. Set schedules to water different garden zones at different times.
Commercial Access
Office or building with multiple access points? Four channels handle main entrance, side gate, parking boom, and delivery gate — all from one Zigbee module with app + RF remote control.
Dual Motor Control
Using interlock mode, you can pair channels for bidirectional motor control. Channels 1+2 for Motor A (forward/reverse), Channels 3+4 for Motor B. Control two motors with direction from one board.
📋 Technical Specifications
| Model | ST-DC4 (Zigbee + RF433) |
| Channels | 4 (independent dry contact relays) |
| Relay Output | Dry contact: NO / COM / NC (per channel) |
| Relay Rating | 10A 250VAC / 10A 30VDC (per relay) |
| Work Modes | Inching (0.5–60s adjustable) · Self-locking · Interlock |
| Protocol | Zigbee 3.0 (router) + 433MHz RF |
| Board Power | 5–32V DC or 90–260V AC |
| App | eWeLink or Tuya/Smart Life (iOS / Android) |
| Voice Control | Amazon Alexa, Google Assistant |
| Zigbee Hub Required | Yes (eWeLink or Tuya compatible hub) |
🔄 DC1 vs DC2 vs DC4 — Which One?
| Feature | DC1 | DC2 | DC4 |
|---|---|---|---|
| Channels | 1 | 2 | 4 |
| Inching | ~0.7s fixed | 0.5–60s adjustable | 0.5–60s adjustable |
| Self-Lock | ✅ | ✅ | ✅ |
| Interlock | ❌ | ✅ | ✅ |
| Best For | Single gate or garage | Gate + garage combo | Full property · Multi-zone · Commercial |
| Price | R149 | — | R359 |
❓ Frequently Asked Questions
Can each channel be set to a different work mode?
How does interlock mode work on 4 channels?
Can I mount it outdoors?
Does it work with Home Assistant?
Can I power it from the gate motor’s power supply?
🤝 Need Help? We’re Here for You!
Visit Us
8 Wildebraam Street
Weltevreden Park, Roodepoort
Gauteng, 1709
4 Gates. 4 Zones. 1 Module.
EACHEN Zigbee DC4 — 4-channel dry contact relay · Adjustable inching · Interlock · eWeLink / Tuya · R359
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