III Technical Index
1. Alarm Temperature 50±5 ℃ (can be also set from -20 ℃ to +99.9 ℃ aiming at different control subjective)
2. Alarm Power-off Time ≤0.2S
3. Alarm Sound ≥ 80Dba
4. Max. Power < 18W
5. Alarm Current 700mA
IV Service Condition
Environment Temperature: 0 ～ 40 ℃
Relative Humidity: 90% ～ 95%
Power Supply: AC220V Allowance: +10% ～ -15% 、 50HZ±1%
Direct-Current Secondary Power: 48V Allowance: +10% ～ -0.5%
V Operating Principle
1. Alarm part
When the fire occurs in the protection area, the temperature detector inside the protection area will transfer the collective temperature signal to the principal machine, and the principal machine will identify, estimate and compare it to set value. When come into or be in accord , the principal machine will send fire signal out, and the alarm signal will be transferred to the monitoring microcomputer through the modem or the net opening of the local area network. Also, the voice alarm will be given off at the same time. The monitoring microcomputer can implement the menu operation through the keyboard, and automatically or manually send out control command to the control unit according to programming content, making the electric relay act and realize linking control.
The alarm principle of anti-theft alarm, waterproof alarm lamp and others is the same as above.
2. Door access control part
The door access controller is generally supplied by alternative-current power supply, and when the power is cut off, it is supplied by the battery backup. The door access controller owns RS-485 interface, which generally connects to the I/O interface of the system principle machine. When someone punches the card, if the card is legal, the electric delay will attract and the electric lock will open. Meanwhile, the card number will be transferred to the I/O interface board through the 485 interface, and the I/O interface board will record the current time and event and then transfer the information to the principal board of PC machine. This information can be sent to the monitoring microcomputer through the public telephone network or local area network. Also, the monitoring microcomputer will transfer the command of opening the door. After receiving the command, the system principal machine will make the control unit carry out action, power up the electric lock to unlock and realize long-distance door opening accordingly.
VI Basic Functions
1. Resetting and sound deadening : Press the reset button, the system will enter into the resetting state to check the system circuit and display interface of luminotron , and provide a waiting time for the detector. After that, the system will enter into monitoring state. Press the sound deadening button, the current alarm sound can be cancelled.
2. Monitoring: Under normal condition, after the system is started up or reset, the principal machine is in the monitor mode and carries out monitoring on transceiver circuit, power supply circuit and keyboard interface of each unit.
3. Fire alarm: When the principal machine receives the alarm signal from the probe, it will give off acousto-optic alarm signal after data treatment and estimation. At this point,the lamp of fire alarm lights and gives off transpositional fire alarm sound.
4. Output: After pressing the output button, the output lamp will light; in alarm state, it can output active linkage interface to drive fire extinguishing device or linking device.
5. Clock: At ordinary times, the panel shows “hour” and “minute”; when timing, the minute timing key can correct the time.
