500W DC48V Variable Frequency Air Conditioner, for Outdooor Telecom Cabinet, Base Station

1. Description

The DC Variable Frequency Air Conditioner, with low energy consumption, is suitable for outdoor environment with large temperature difference. It uses DC-48V(-45V~-60V) input, PWM centrifugal fan speed adjustment, and object unit temperature PID adjustment mode. The input power can be adjusted according to cooling capacity demand. The Max. cooling capacity is 650W, but input power is only 216W.

The DC48V Variable Frequency Air Conditioner is a full automation temperature control product. It uses intelligent controller to control the whole system of the air conditioner. According to the variation of environment temperature, the intelligent controller can automatically detect, operate and record the whole system’s operating time, power consumption, event and historical data. It can store 100 event records and 1280 historical data records, and can enquire 256 days’ daily record information. The product is widely applied in telecom cabinet, small and medium sized telecom room, UPS room, outdoor base station room, etc.  The air conditioner includes the following specs: 300W, 500W, 1000W, 1200W, 1500W, 2000W. In addition, it also can be custom made.

2. Features

   (1) Thermostatic internal temperature: 26°C;
   (2) When environment temperature is 35°C, the input power is only 216W;
   (3) Control system fault detection, perfect smoke and water alarm input linkage;
   (4) Air exhaust temperature detection, compressor state real time detection ;
   (5) Lightning proof, for outdoor use;
   (6) Temperature dynamic adjustment, very low power consumption, specially designed for integrated cabinet;
   (7) Protection level: IP55.

3. System Principle Diagram

        Diagram 1: System Principle Diagram

4. Technical Parameters

   500W DC48V Air Conditioner

Diagram 2:  Dimension of 500W DC48V Variable Frequency Air Conditioner

 5. Electrical Wiring Diagram

                                             Diagram 3: wiring diagram

Wiring Ports:

0V -48V: power supply input
F+  F- : straight ventilation fan control output
A+  B- : RS-485 communication interface
AL1  AL2: general alarm output
12V SGND: air conditioner 12V voltage output, 12V is anode, SGND is cathode
S: smoke sensor detection input
D: door alarm detection input
W: water sensor detection input
REMOTE: remote control input

6. System Control

Technical Parameter

a. LCD display, user friendly;
b. Simultaneously display temperature and humidity inside the cabinet and communication room temperature;   
c. Temperature measurement accuracy: 0.1°C; humidity measurement accuracy:4%;
d. Can store 180 days’ daily event record, 1 record every day;
e. Daily highest temperature, lowest temperature, average temperature
f. Daily event record;
g. Store the former day’s daily data at 0:00 every day; Can enquire 180 days’ daily record information;
h. RS485 or RS232 communication,RTU-Modbus protocol, support remote detection and control;
i. Use PID control algorithm, intelligently adjust output power, optimize power consumption;
j. Controllable air conditioner quantity: 2 sets. 1 set of air conditioner for communication room, and 1 set of small air conditioner for thermostatic cabinet.
k. Control mode: pulse (Non dry contact air conditioner), conducting (dry contact air conditioner)
l. Real-time control air conditioner on/off
m. Power supply: DC48V
n. Power consumption:≤5W;
o. Working environment: -30°C~70°C; <90%RH;
p. Installation method: guide rail,hanging;
q. Dimension:150mm×190mm×45mm.

7. Wiring Diagram

  JD1: main power input (DC48V)
  JD2: heating control output
  JD3: DC compressor control interface:
      1 - 48V; 2 - control (0~5V); 3 - feedback; 4 - 0V.
  JD4: fan control interface:
      1 - 48V; 2 - internal fan control; 3 - internal fan feedback.
      4 - external fan control; 5 - external fan feedback; 6 - 0V.
  JD5: straight ventilation (hydrogen exhaust) output interface (48V)
  JD6: cabinet air conditioner control interface
      1, 2: control input;  3, 4: feedback transformer input.
  JD7: alarm output interface
      1, 2: general alarm output dry contact; 
      3, 4: air conditioner system alarm output.
  JD8:
      1, 2: remote control dry contact input
      3, 4: working state output dry contact
  JD9: communication interface
      1: RXD (or 485A+)  2: TXD (or RS485B-)  3: SGND;
  JD10: connected with four DI input

                                                                              Diagram 4: Wiring Diagram