Allen Bradley 1756-OF6CI Controllogix Analog Isolated Output Module

Manufacturers: Allen-Bradley, Rockwell Automation

Model(s): Allen-Bradley ControlLogix

Additional Information: ControlLogix Isolated Analog Output Module, Current, 6 Points (20 Pin)

Dimensions: 3.8 x 14.6 x 14.0 cm

Weight: 0.2kg

1756-OF6CI 8-Point PLC Module

Allen Bradley 1756-OF6CI 8-point analog DC output module is a current loop analog DC 8-point output module in the control logic series of high-speed I/O modules, which can provide shared high-speed output signals among multiple ControlLogix controllers. The module is installed on the controller chassis and requires a removable terminal block or fuse interface module (IFM) for installation and all field-side wiring. 1756-OF6CI has 6 independently isolated 13-bit outputs, with 0 to 21 mA low signal and high signal user count output. The module absorbs 250 mA of chassis current at 5.1 V DC and 225 mA at 24 V DC. The total power of the backplane is 6.7 watts at a load of 0 to 550 ohms, and a load of 551 to 1000 ohms. The total power of the lower back panel is 8.5 watts. load. 1756-OF6CI is different from most 1756 I/O modules in that it does not have an open circuit detection function, but it provides 24 volt DC overvoltage protection and provides short circuit protection by electronically limiting the output current to 21 mA or less. The module needs to be used for on-site calibration every 6 months and can be calibrated to an accuracy of 0.01% within the working range of 4 to 21 mA.

Its maximum offset drift is 1 microampere per degree Celsius, the maximum gain drift is 100 ppm per degree Celsius, and the module error of the high-speed output signal generated by the module is less than 0.6%. For floating-point data format, the longest scan time is 25 milliseconds, for integer data format, the longest scan time is 10 milliseconds, and can be easily converted between data formats through the R-Ladder DAC converter. The 1756-OF6CI uses a basic insulation test of 1350 volts AC for 2 seconds, with an isolation voltage of 250 volts between the output channels on the backplane. It is connected to the chassis by digital control and electronic keying to ensure accuracy; it is keyed to the removable junction box (RTB) by mechanical mode. It is designated as T4A North America and T4 IEC rated temperature codes and has an effective temperature limit of 0 to 60 degrees Celsius (32 to 140 degrees Fahrenheit) in a non-condensing relative humidity range of 5% to 95%. 1756-OF6CI has no rated enclosure and has passed UL, CSA, CE, EX, C-TICK, FM, and KC certifications.

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