Allen - Bradley 1756 - A4 is a ControlLogix chassis. Here are its main parameters:
Part Number: 1756 - A4
Number of Slots: 4
Mounting Style: Horizontal back - panel mounting
Enclosure Type: Open
Dimensions: 50.8 cm (H) × 50.8 cm (W) × 20.3 cm (D) (20 inches × 20 inches × 8 inches)
Weight: Approximately 750 grams (1.65 pounds)
Power Dissipation: 4 watts
Power Consumption: 1.8 watts
Thermal Power: 6.1 British thermal units (BTU) per hour
Backplane Current: 1.5 amperes at 1.2 volts DC, 4 amperes at 3.3 volts DC, 15 amperes at 5.1 volts DC, and 2.8 amperes at 24 volts DC
Operating Temperature Range: 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit)
Storage Temperature Range: - 40 to 85 degrees Celsius (- 40 to 185 degrees Fahrenheit)
Relative Humidity Range: 5% to 95% (non - condensing)
Vibration Frequency Range: 10 to 500 hertz