Simplified Gas Alarm System B-780
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-
- Model
- B-780
- Target Gas
- LPG / Methane
- Detection Principle
- Catalytic combustion, Hot wire semiconductor
- Alarm Set Value
- 1/100 to 1/4 %LEL
Simple and reliable three-point gas alarm system for LPG / Methane monitoring
Features
- The B-780 works with three detector models suitable for different applications.
- Gas alarm will be notified with red LED blinks and beeping sound.
- Fault alarm will be notified with amber LED blinks and beeping sound.
- Alarm unit is wall-mounted and easy to install.
- Power supply is 100/220 VAC and is connected to a standard AC outlet.
- Compact and lightweight
- There are three types of external outputs, which can be output to an external alarm device, emergency shutoff interlocking system, etc.
- Operation check can be done easily with TEST button.
Specifications
(ALARM)
| Model | B-780 | |
| Target Gas | LPG | Methane |
| Number of Connected Detectors | Up to 3 Units | |
| Detectors to be Connected | KD-5G, KD-5T, GD-1B | KD-5GM, KD-5M |
| Gas Alarm | ・Red ALARM LED blinks ・Beeping sound, 80 dB/m or higher ・Selectable to auto resetting or manual resetting |
|
| Fault Alarm | Amber FAULT LED blinks | |
| Power Supply | 100/220 VAC±10%, 50/60Hz | |
| Power Consumption | Approx. 5 W during normal operation (max.) Approx. 10 W during gas alarm (max.) |
|
| External Outputs | (1) 6 VDC, 10 mA during nomal operation, 12 VDC, 10 mA during gas alarm, and 0 VDC during fault alarm | |
| (2) 100/220 VAC, 1 A max. during gas alarm
(output delay time is approx. 35 sec., which can be changed to zero (no delay) by DIP switch setting), Replaceable fuse |
||
| (3) NO/NC contact 24 VDC, 1 A max. (output delay is approx. 35 sec., which can be changed to zero (no delay) by DIP switch setting) | ||
| Operating Temperature | -10°C to +40°C (No condensation) | |
| Dimensions | W138 × H180 × D33 mm (Excluding protrusions) | |
| Mass | Approx. 420 g | |
| Accessories | Screws x 2, Crimp terminals x 10 | |
(DETECTOR)
| Model | KD-5G | KD-5GM | KD-5T | KD-5M | GD-1B |
| Detection Principle | Catalytic combustion | Hotwire semiconductor | Catalytic combustion | ||
| Target Gas | LPG | Methane | LPG | Methane | LPG |
| Alarm Set Value | 1/100 to 1/4 %LEL | ||||
| Response Time | 30 sec. or less | 1 min. or less | 30 sec. or less | 1 min. or less | 30 sec. or less |
| Power Supply | 24 VDC±20% | ||||
| Current Consumption | 30 mA or less at 24 V | ||||
| Structure | Explosion-proof (d2G4) | Weather-resistant | ― | ||
| Cable Length | Up to 500 m (CVV, 1.25 mm2, 3-core cable) | Up to 200m (0.5mm2, 3-core cable) |
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| Operating Temperature | -10℃ to +60℃ | -10℃ to +50℃ | -10℃ to +40℃ | ||
| Dimensions | W94 x H141 x D123 ㎜ (Excluding protrusions) | W52 x H116 x D37 ㎜ | |||
| Mass | Approx. 1,500 g | Approx. 220 g | |||
| Mounting Method | By screws | By installation plate or band | |||
| Accessories | Stand, rainproof cap, rainproof cover, screws, screw expansion plugs, crimp terminals | Installation plate, wood screws, band, connectors, screw expansion plugs, crimp terminals | |||
