Allen Bradley 1756-IF4FXOF2F is an analog combination I/O module. This module belongs to the ControlLogix system, which is compatible with the 1756 ControlLogix chassis and requires a 1756-TBS6H or 1756-TBCH removable terminal block enclosure (RTB). This module has 4 high-speed, sub millisecond level differential inputs and 2 high-speed voltage or current outputs. This module has a display that displays the module’s health and operational status, such as calibration mode. The input range of 1756-IF4FXOF2F is+/-10V, 0 to 10V, 0 to 5V, and 0 to 20mA. When the module exceeds these ranges, there will be an out of range indication. The overvoltage protection voltage is 30V DC and the current is 8V AC/DC. Its open circuit detection is a positive full range reading within 1 second.
The output range of this module is+/-10 volts, 0 to 20 milliamperes, and it has short circuit protection, with an electronic current limit of 21 milliamperes or lower. It also has overvoltage protection and open circuit detection for 24 volt DC, but only limited to current output (note that the output must be set to greater than 0.1 milliampere). The rated voltage and current of the 1756-IF4FXOF2F backplane are 375 mA (5.1 V DC) and 100 mA (24 V DC), respectively. The rated voltage and current of the analog input and output are -10 to 10 V and 4 to 20 mA, respectively. The power consumption of this module is 4.3 watts, the power consumption of voltage is 4.3 watts, and the power consumption of current is 4.7 watts. The heat dissipation of voltage and current is 14.66 BTU/hour and 16.02 BTU/hour, respectively. Its current consumption is 375 milliamperes at 5.1 volts and 100 milliamperes at 24 volts. It also has an update cycle of 300us minutes of scanning time, as well as sub millisecond channel scanning and synchronous sampling across multiple modules.
Allen Bradley 1756-IF4FXOF2F is a ControlLogix high-speed analog combination module. This module has four (4) high-speed, sub millisecond level differential inputs, compatible with receiving 10V, 0 to 10V, 0 to 5V, and 0 to 20 mA signal ranges. Each analog input channel integrates over range and under range indications. It is also equipped with two (2) high-speed voltages or currents, with an output range of 10V and 0 to 20 mA.
The input channel of this module converts the received analog signal through successive approximation method, with conversion resolutions of 14 bits (10.5V) and 12 bits (21 mA). It has repeatability of one least significant bit (LSB) and requires a calibration interval of 12 months. Analog inputs are suitable for measuring analog process variables, such as flow rate, liquid level, pressure, temperature, viscosity, pH value, turbidity, velocity, and many other process variables.
The output channel of this module has a 13 bit output resolution (21mA=2.8 A/bit) and a 14 bit output resolution (21.8v=1.3mV/bit). The output channel conversion is achieved through the R-trapezoidal DAC conversion method, without loss of code. The output analog signal of this module can be used to control the modulation actions of control valves, variable frequency drives, dampers, louvers, signal converters, and sensors. It can also be used to forward signals for use by indicators, recorders, and other devices. The analog output of this module can be linked to the control output of manual control commands, arithmetic operations, or proportional integral derivative (PID) controllers.