CAI 20

Description

CAI 20 is an analog input module for the ABB Symphony system, offering fast measurement updates, signal damping, and group-wise electrical isolation for industrial applications.

General Information

• Model: CAI20

• Function: Analog Input Module

• System: ABB Symphony

Specifications

• Input signal damping: Low-pass, T = 100 ms (–30 dB at 50 Hz)

• Measurement update time: < 40 ms (typical)

• Electrical isolation: Group-wise (per termination unit)

• Rated voltage: 50 Veff (according to VDE 0110)

• Voltage withstand test: 500 Veff to system

Environmental Conditions

• Ambient temperature: 0 to 50 °C (with cooling inside rack)

Power Supply

• Supply voltage (Uv1/Uv2): 20 to 33 V DC

• Fusing: Glass fuse 5×20 mm, 3.15 A time-lag (T 3.15 H)

• Permissible supply overvoltage:

• 35 V for 1 second

• 45 V for 10 milliseconds

Current and Power

• Current consumption (transmitter supply off): 195 mA at 24 V

• Current consumption (transmitter supply on): 865 mA at 24 V (simultaneity factor η = 0.75)

• Power loss: Max. 11 W at 24 V

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