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China CA-91A Combustible Gas Alarm Controller - Factory Suppliers for 4 Detectors, LCD Display, RS485 Signal
Product Overview
CA-91A is a centralized compatible main & branch line combustible gas alarm controller. Equipped with a central LCD screen, it displays monitoring data clearly and supports easy operation. It adopts four-bus signal transmission, compatible with RS485 bus-type and 4-20mA split-type gas detectors, and can be connected to a maximum of 4 detectors.
The controller supports concentration over-limit sound-light alarm and fault sound-light alarm. Built-in wireless remote transmission module, with reliable power supply lightning protection and signal lightning protection inside, greatly improving anti-interference performance. Multiple programmable signal outputs can realize linkage control of exhaust fans, solenoid valves and other equipment, suitable for commercial and industrial gas safety monitoring scenarios.
Application Sites
Commercial Places
LPG stations, gas boiler rooms, restaurants, villas, basements and other gas-consuming areas.
Industrial Places
Petrochemical industry, oil depots, automobile manufacturing, shipbuilding industry and other industrial sites.
Technical Parameters
| Model | CA-91A Combustible Gas Alarm Controller |
|---|---|
| Working Voltage | AC220V±15%, 50Hz±1; DC12V/1.3Ah backup battery |
| Detector Power Supply | DC24V 0.6A |
| Communication Mode | RS485 (Bus type) / 4-20mA (Split type) |
| Max. Connected Detectors | 4 units |
| Signal Distance | ≤1000m |
| Max Output Current | 0.6A |
| Output Signal | 3 groups programmable relay switch output; 1 group programmable DC24V pulse output |
| Working Environment | Temperature -10℃ ~ +55℃; Humidity ≤95%RH (Non-condensing) |
| Dimension | 250mm × 185mm × 65mm |
| Weight | Approx. 2.2kg |
Frequently Asked Questions
How many gas detectors can be connected to the CA-91A controller?
The CA-91A Combustible Gas Alarm Controller supports a maximum connection of up to 4 detector units.
What communication modes are compatible with this controller?
It features four-bus signal transmission and is compatible with both RS485 bus-type and 4-20mA split-type gas detectors.
Can the CA-91A control external equipment like exhaust fans?
Yes. It has multiple programmable signal outputs (3 groups programmable relay switch outputs and 1 group programmable DC24V pulse output) which can realize linkage control of exhaust fans, solenoid valves, and other auxiliary equipment.
What kind of alarms does the CA-91A provide?
The controller supports concentration over-limit sound-light alarms as well as fault sound-light alarms to ensure safety and system reliability.
Does the controller have surge or lightning protection?
Yes. The unit features built-in power supply lightning protection and signal lightning protection, which greatly improves its anti-interference performance in industrial settings.
What is the maximum signal transmission distance?
The CA-91A supports a signal transmission distance of up to 1000 meters, making it suitable for large commercial and industrial sites.