Allen Bradley 1756-OF8 Output Analog Module

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Mfr. Part Number: 1756-OF8

Manufacturer: Allen-Bradley / Rockwell Automation

Description: Allen-Bradley 1756-OF8 ControlLogix Analog Output Module, Current/Voltage, 8 Pts

Full Description: Allen-Bradley 1756-OF8 ControlLogix Analog Output Module, Current/Voltage, 8 Points (20 Pin)

1756-OF8 Information

The 1756-OF8 Voltage/Current Output Analog Module by Allen-Bradley is a module with 8 voltage or current analog outputs and it is fitted into any slot of the ControLogix Chassis.

It has an output rating of either ± 10 Volts or 0 to 20 mA with a signal resolution of 15-bits across 21 mA and 15 bits across 10.4 Volts and it has a backplane current of 210 mA at 24 Volts DC and 150 mA at 5.1 Volts DC with a total power rating of 5.8 Watts.

The module has a voltage or current output range of either -10 to 10V or 4 to 20 mA and the maximum power consumption of its circuit is 5.8 Watts.

The 1756-OF8 offers a Circuit Detection feature with over-voltage protection at 24 Volts DC and a short-circuit protection by electronically limiting the current to 21mA or less.

The 1756-OF8’s voltage or current settling time is 2 milliseconds and it has a calibration accuracy of 0.05%, and a module calibration interval of 12 months. When operational, it has an offset drift of 50 ppm/degrees Celsius and 0.1 ppm/degrees Celsius and temperature-dependent gain drift of 25 ppm/degrees Celsius and 50 ppm/degrees Celsius (current).

The module has a scan time of 12 milliseconds for floating point and 8 milliseconds for integer and has an overall module error of 0.15% (in voltage mode) and 0.3% (in current mode).

The1756-OF8 module has an isolation voltage of 250 Volts using reinforced insulation tested 1350 Volts AC for 2 seconds between the output channels and the backplane.

It has a T4A (North America), T4 (ATEX), and T4 (IEC) temperature codes and comes in an open-style enclosure.

The 1756-OF8’s operational temperature ranges between 0 and 60 degrees Celsius and it is designed to maintain its function at a shock rate of 30G and a vibration of 2G at 10 to 500 Hertz.

1756-OF8 Technical Specifications

Manufacturer: Rockwell Automation

Brand: Allen-Bradley

Part Number/Catalog No.: 1756-OF8

Series: ControlLogix

Module Type： Analog Output Module

Outputs 8： Current-Voltage

Backplane Current (5Volts)： 140 milliamps

Backplane Current (24 Volts)： 210 milliamps

Removable Terminal Blocks： 1756-TBNH, 1756-TBSH

Power Dissipation (Max) ：4.9 Watts at 60 Celsius

Removeable Terminal Block(s)： 1756-TBNH, 1756-TBSH

Isolation Voltage： 50 Volts Continuous

Enclosure： None

1756-OF8 Allen-Bradley Non-isolated Analog Output Modules

Eight voltages or current

15 bits across 21 mA – 650 nA/bit

15 bits across 10.4V – 320 V/bit

Backplane: 5.1V DC, 150 mA max, 24V DC, 210 mA max

Output Voltage: -10…+10V

Output Current: 4…20mA

Removable terminal block 1756-TBNH 1756-TBSH

Module scan time, min 12 ms floating point 8 ms integer

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