I. Overview:
The explosion-proof performance of ExPCU-01 explosion-proof positive pressure controller complies with the provisions of GB3836.1-2000 "Electrical equipment for explosive gas environments Part 1: General requirements", GB3836.5-2004 "Electrical equipment for explosive gas environments Part 5: Positive pressure type" P "", GB3836.2-2000 "Electrical equipment for explosive gas environments Part 2: Explosion proof type" d "", and GB3836.4-2000 "Electrical equipment for explosive gas environments Part 4: Intrinsically safe type" i ". The explosion-proof mark is ExPdib Ⅱ BT4, suitable for power supply of DC 24V, and can control the gas supply system of positive pressure ventilation explosion-proof control cabinets and positive pressure compensation explosion-proof control cabinets.

2、 ExPCU-01 explosion-proof positive pressure controller model meaning:

3、 Environmental conditions for use:
a) Altitude not exceeding 2000m;
b) The ambient temperature is -40~+60 ℃
c) The relative temperature of the air shall not exceed 90% (+25 ℃);
d) The inclination with respect to the vertical plane shall not exceed 15 °;
e) In places without significant shaking or impact vibration;
F) The pollution level is 3 poles;
g) The installation category is Class III;
h) In an environment without damaging the insulation with gas or vapor;
i) IIA~IIB level, T1~T4 group explosive gas mixture Zone 2 hazardous area.

4、 Main technical data:
Rated voltage: DC 24V;
Protection level: IP20;
Power consumption: less than 2W;
Input circuit current: less than 20mA;
Output capacity: DC 24V 200mA;
Dimensions: 120 × 120 × 90mm;
Disk opening size: 110 × 110mm;

5、 Structure description:
1. The casing of the controller is made of ABS plastic.
2. The controller is composed of control instruments, pressure transmitters, instrument terminals, and cable entry devices.