EC-533R
Gas Shutoff System - 3-Channel Controller
Equipped with the CLNF APD30-15 industrial switching power supply - 30W rated, universal input 100-277VAC, stable DC 15V / 2A output. Provides clean, regulated power across all three detection channels regardless of mains voltage variation.
Three-channel gas shutoff controller in a robust hinged ABS enclosure. Independent dry-contact relay outputs for each zone drive GD-703/704/705 shut-off valves on alarm. Per-channel LED indicators, built-in buzzer, and front-panel MUTE / OPEN/CLOSE / RESET controls allow full operation without opening the enclosure. Operating range -10℃ to 55℃.
- 3× independent dry-contact relay outputs (#1 / #2 / #3)
- CLNF APD30-15 SMPS - 100-277VAC input, DC 15V/2A
- Built-in buzzer + MUTE / OPEN/CLOSE / RESET buttons
- Compatible with GD-703, GD-704, GD-705 valves
- External input terminal for third-party integration
- Hinged ABS enclosure, -10℃~55℃ operating range
CLNF APD30-15
Industrial SMPS
Unlike transformer-based designs, the switching power supply inside the EC-533R operates across a universal 100-277VAC input range and converts mains power to a stable, low-ripple DC 15V / 2A output. This keeps sensor and relay circuits clean even when building power fluctuates.
- Wide-range AC input - works on 100V and 220V mains
- High-efficiency switching design - less heat, longer life
- Low output ripple - cleaner power for sensitive detection circuits
- UL / CE / RoHS certified SMPS module
Internal view - CLNF APD30-15 SMPS (bottom right) · GC-533/536 main board · 3× dry-contact terminal strips
EC-533R Specifications
Source: product label GC-533R (3 Circuit) · board GC-533/536 REV1.0
Built for Multi-Zone Reliability
Industrial-Grade SMPS
The CLNF APD30-15 switching power supply accepts 100-277VAC worldwide input and delivers a stable DC 15V / 2A output - ensuring clean, regulated power even on noisy industrial lines.
3-Channel Independent Monitoring
Dedicated #1 / #2 / #3 LEDs and dry-contact relay outputs allow independent gas detection zones to be monitored and shut off separately without cross-channel interference.
Audible + Visual Alarm
Built-in piezo buzzer and per-channel LEDs provide immediate on-site alarm. MUTE button silences the buzzer while keeping visual indicators active for continued status monitoring.
OPEN / CLOSE / RESET Control
Front-panel OPEN/CLOSE button manually actuates connected valves. RESET clears latched alarm states after the gas hazard is resolved. All controls are operable without opening the enclosure.
Safety & Installation Warnings
Connect only to AC 220V, 50/60Hz supply. The internal SMPS handles wide-range input (100-277VAC) but must not be connected to DC sources.
All mains wiring to AC input terminals and dry-contact wiring must be carried out by a licensed electrician with power fully isolated at the breaker.
Per product label: avoid installation locations where steam is in direct contact with the unit or where high moisture is present.
Immediately ventilate the area. Do not operate any electrical switches. Close the manual gas cock and contact emergency services.
EC-533R FAQ
Need the EC-533R for your facility?
Tell us your number of detection zones and valve models - our team will confirm compatibility and provide a project quote.