Product Description:

The Allen-Bradley 1756-OF4 module is the ControlLogix non-isolated output module. It has four voltage or current outputs available, with current resolution of 15 bits 21 mA, 650 nA/ bit, and voltage resolution of 16 bits, 10.5V, 320 µV/ bit. It requires a 20-pin RTB or detachable junction box housing to connect to field equipment. Compatible RTBS are 1756-TBSH and 1756-TBNH. Before installing a module into a chassis and power supply using an RTB, ensure that the chassis and power supply have been installed and grounded.

The output module has rolling time stamps of data, live plug and pull (RIUP), onboard functionality, module resolution, producer/consumer communication, and multiple data formats. The data formats available in this module are floating-point mode and integer mode. The module can also use channel data to multicast fault data and status to the owner listening controller.

The backplane voltage and current rating for the 1756-OF4 module is 5.1V DC, with a maximum of 150mA for 24V DC. It has a current consumption of 150 mah at 5.1V and 120 mah at 24V for a total backplane power of 5.8W. Its backplane power consumption is 3.7 W and overvoltage protection is 24V DC. Module open circuit detection is only for current output, but the output should be set to greater than 0.1 mA. It also has short circuit protection limited to 21 mah or less.

Output ranges from 0 to 20 mah, 0 mah and -32768 mah for low signal and user counts, and 21.2916 mah and 32767 mah for high signal and user counts. In the +/ -10V output range, the module has low signal and user counts of -10.4336V and -32768 counts, and high signal and user counts of 10.4336V and 32676 counts, respectively. It has been routinely tested at 1350V AC for 2 seconds and has a continuous isolation voltage of 250V.

The module has a voltage drive capability of over 2000 ohms and a current drive capability of 0 to 750 ohms. It has a module sweep time of 12 ms floating-point and 8 ms integer, with module errors of 0.15% of the voltage range and 0.3% of the current range. For resistive loads, the stabilization time is less than 2 milliseconds to 95% of the final value. It also has a maximum power consumption of 3.25W (4-channel current) and heat dissipation of 10.91 BTU/ hour.

The Allen-Bradley 1756-OF4 is an analog output module capable of providing analog voltage and current signals. These output signals can be used to start modulation devices and actuators, or to retransmit signals for use by loggers, indicators, data loggers and external controllers.

The module has an output voltage signal of +/10 VDC or 4-20 mA, with resolutions of 15 bits across 10.5V, 320 µV/ bit and 15 bits across 21 mA, 650 nA/ bit. R-Ladder DAC is adopted for monotonous code-free conversion. When configured as floating point, the module scan time is 12 ms and the integer is 8 ms.

Analog output modules are commonly used to regulate actuators and devices, such as variable frequency drivers (VFDS), regulating control valves, dampers, louvers, and other actuators. It is usually designed to implement control outputs or commands configured in user programs. Such user programs may include proportional-integral-differential (PID) controllers, mathematical calculations, manual input interfaces, movements, and similar analog processing instructions.

Analog outputs are also available for recorders, indicators, and data recorders. It can also be used to connect external controllers as remote set points to be part of more advanced control policies, such as cascading, feedforward, and other control policies that use more than two (2) process variables.

The module needs to be calibrated every 12 months with a calibration accuracy better than 0.05% of the 4 to 21 mA, -10.4 to 10.4V range.

Guizhou Yuanmiao focuses on DCS, PLC, robot and large-scale servo systems.

Main products all kinds of modules/cards, controller, touch screen, servo drive

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Fast delivery, accurate delivery, primary source, spot inventory more than 100 million

Our main control system (DCS, PLC/SPS, CNC), panel controller, HMI and display panel, industrial PC, drive (inverter and servo system), motor, power supply

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