BZQ-1 Explosion-proof adapter HEMEI

1, the product appearance and installation size:

2, the main performance indicators:
1. Conditions of Use:
a. Ambient temperature: -45 ℃ ~ 55 ℃
b. Relative humidity: 10% ~ 95% (25 ℃)
c. Atmospheric pressure: 86KPa ~ 106KPa
d. The environment exists Class B Class B T5 temperature group explosive gas mixture
2. The main technical parameters:
a. Supply voltage: AC220V (or 120V) ± 10%
       b. Power consumption power: 20W
       c. PA output power: 5W
       d. Explosion-proof mark: Exdib Ⅱ BT5
f. Protection class: IP65
g. Corrosion level: WF2
h Overall dimensions: 270 × 250 × 105
k. . Weight: 2.5Kg
3, the product structure and working principle
1. Structural features:
 Product shell made of silicon aluminum alloy casting, surface electrostatic spraying, the overall structure of solid, beautiful, waterproof, corrosion-resistant, long-term work in harsh environments.
2. working principle:
(1) Power
       The AC220V power supply is connected to the primary side of the power transformer via terminals 19 and 20. The power supply is provided by the step-down, rectification and regulation, and provides the required power for the amplifier, the transmission amplification circuit and the control circuit.
(2) send letter amplification
Speech sound from Mike converted into electrical signals, amplified by the TDA2003 (IC1) integrated circuit output, the output signal according to need, respectively, sent to 6,7,9,10,11,12 terminals, through these terminals to the corresponding Communication terminal.
(3) intercom amplifier
Into the driller's room signal, amplified by TDA2003 (IC2) integrated circuit to promote the speaker sound.
(4) control
Terminal No. 13, No. 14 and No. 15, access control switch, can choose to speak with the second floor or drilling rig.