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1756-OF8IH | Allen-Bradley ControlLogix Analog Isolated Output HART 8-Point
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- $3,619.00
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- $3,619.00
- Regular price
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Product Description P/N: 1756-OF8IH
Description
The Allen-Bradley ControlLogix 1756-OF8IH is a ControlLogix HART I/O module featuring 15-bit resolution across 24 milliamperes. It includes 8 isolated differential outputs and a HART modem for each channel, providing robust and precise control in industrial applications.
Technical Specifications
| Brand | Allen-Bradley |
| Category | PLCs/Machine Control |
| Part Number | 1756-OF8IH |
| Subcategory | PLC Module/Rack |
| Manufacturer | Rockwell Automation |
| Series | ControlLogix |
| Module Type | ControlLogix HART I/O Module |
| Channels | 8 Isolated Differential Outputs and 1 HART Modem Per Channel |
| Input Current Range | 0-20 Miliamperes, 4-20 Miliamperes |
| Overvoltage Protection | +/- 24 Volts DC |
| Resolution | 15 Bits Across 24 Miliamperes |
| Module HART Scan Time | 1 s w/ HART Enabled (Estimate) |
| Enclosure Type | None (Open-Style) |
Information About 1756-OF8IH
The Allen-Bradley 1756-OF8IH ControlLogix HART Output Module features 8 isolated differential current outputs and a HART modem per channel, fitting into any 1756 I/O chassis slot. It operates within an output range of 0-20mA and 4-20mA with 15-bit channel resolution across 24mA, drawing approximately 400mA backplane current at 24V DC. The module includes open circuit detection, ±24V DC over-voltage protection, and electronic current limiting for output short-circuit protection to 21mA or less.
It has a drive capability of 50-750Ω (with short circuit survival), a load reactance of 10μH, and load-dependent settling times of less than 100ms with HART enabled and less than 23ms with HART disabled. Calibration accuracy is 0.15% at 4-20mA, with a recommended calibration interval of 12 months. The module has an OFFSET drift of ±3 ppm full-scale, a GAIN drift of ±4 ppm, and a module error of 0.3% at 4-20mA.
The 1756-OF8IH offers an estimated HART scan time of 1s, IEEE 32-bit floating point data format, and uses the R-Ladder DAC output conversion method. It provides 250V voltage isolation between outputs-to-backplane with reinforced insulation (tested at 3535V DC for 60s) and 250V isolation between output-to-output and output-to-ground with basic insulation (tested at 2120V DC for 60s). It is designed for use with copper wiring and meets T4A (North America) and T4 ATEX and EIC temperature codes. The module operates within a temperature range of 0-60 °C and humidity of 5-95% non-condensing, with an ambient temperature rating of 60 °C (140 °F).
Manufacturer information
Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.
Description
The Allen-Bradley ControlLogix 1756-OF8IH is a ControlLogix HART I/O module featuring 15-bit resolution across 24 milliamperes. It includes 8 isolated differential outputs and a HART modem for each channel, providing robust and precise control in industrial applications.
Technical Specifications
| Brand | Allen-Bradley |
| Category | PLCs/Machine Control |
| Part Number | 1756-OF8IH |
| Subcategory | PLC Module/Rack |
| Manufacturer | Rockwell Automation |
| Series | ControlLogix |
| Module Type | ControlLogix HART I/O Module |
| Channels | 8 Isolated Differential Outputs and 1 HART Modem Per Channel |
| Input Current Range | 0-20 Miliamperes, 4-20 Miliamperes |
| Overvoltage Protection | +/- 24 Volts DC |
| Resolution | 15 Bits Across 24 Miliamperes |
| Module HART Scan Time | 1 s w/ HART Enabled (Estimate) |
| Enclosure Type | None (Open-Style) |
Information About 1756-OF8IH
The Allen-Bradley 1756-OF8IH ControlLogix HART Output Module features 8 isolated differential current outputs and a HART modem per channel, fitting into any 1756 I/O chassis slot. It operates within an output range of 0-20mA and 4-20mA with 15-bit channel resolution across 24mA, drawing approximately 400mA backplane current at 24V DC. The module includes open circuit detection, ±24V DC over-voltage protection, and electronic current limiting for output short-circuit protection to 21mA or less.
It has a drive capability of 50-750Ω (with short circuit survival), a load reactance of 10μH, and load-dependent settling times of less than 100ms with HART enabled and less than 23ms with HART disabled. Calibration accuracy is 0.15% at 4-20mA, with a recommended calibration interval of 12 months. The module has an OFFSET drift of ±3 ppm full-scale, a GAIN drift of ±4 ppm, and a module error of 0.3% at 4-20mA.
The 1756-OF8IH offers an estimated HART scan time of 1s, IEEE 32-bit floating point data format, and uses the R-Ladder DAC output conversion method. It provides 250V voltage isolation between outputs-to-backplane with reinforced insulation (tested at 3535V DC for 60s) and 250V isolation between output-to-output and output-to-ground with basic insulation (tested at 2120V DC for 60s). It is designed for use with copper wiring and meets T4A (North America) and T4 ATEX and EIC temperature codes. The module operates within a temperature range of 0-60 °C and humidity of 5-95% non-condensing, with an ambient temperature rating of 60 °C (140 °F).
Manufacturer information
Allen-Bradley, a brand of Rockwell Automation, specializes in manufacturing industrial automation equipment. The product range includes programmable logic controllers (PLCs), motion control systems, safety devices, motor control equipment, automation software, and HMI panels. Allen-Bradley products are known for their reliability and integration with other systems.