The Allen-Bradley 1756-OF4 is a 4-channel analog output module for the ControlLogix platform. Its core function is to convert digital control signals from the controller into high-precision analog voltage or current signals for driving modulating field devices like actuators, valves, and variable frequency drives. It is an active product with broad application in industrial automation.
Item No :
1756-OF4Order(MOQ) :
1Payment :
EXWProduct Origin :
USAShipping Port :
Wuhan, Hubei, ChinaLead Time :
3-5 daysWeight :
0.5kgProducts Description
Allen-Bradley 1756-OF4 ControlLogix Analog Output Module, Current/Voltage, 4 Points (20 Pin). Number of Outputs: 4 voltage or current; Resolution: 15 bits; Removable Terminal Block Housing: 1756-TBNH or 1756-TBSH. The 1756-OF4 module supports On-board data alarming, Scaling to engineering units, Real-time channel sampling, IEEE 32-bit floating point or 16-bit integer data formats.
| Model Number | 1756-OF4 |
| Place of Origin | USA |
| Dimension/Weight | 0.5 kg |
| Condition | new and original |
| Warranty | 1 year |
| Shipping term |
DHL Fedex TNT EMS UPS |
| Payment | TT / Western Union |
| Delivery Time | 3-5 days |
| Service |
24 Hours Online Service |
Key Parameters
| Item | Specifications / Features |
|---|---|
| Number of Outputs | 4 channels |
| Output Signal Types | Configurable: ±10.4V DC voltage, 0–21 mA current |
| Resolution | 15 bits |
| System Platform | Allen-Bradley ControlLogix 1756 chassis |
| Update Period | 6 ms (integer mode); 10 ms (floating point mode) |
| Backplane Current Draw | 150 mA @ 5.1V DC; 120 mA @ 24V DC |
| Power Dissipation (Max) | 4.9 W @ 60°C |
| Compatible RTBs | 1756-TBNH (screw clamp) or 1756-TBSH (spring clamp), 20-pin |
| Operating Temperature | 0-60°C (32-140°F) |
| Dimensions (W x H x D) | 38.1 mm × 300 mm × 111.25 mm |
| Weight | Approx. 0.45 kg (1.00 lbs) |
Configurable Voltage and Current Outputs: The module's standout feature is its per-channel configurability for either voltage (±10.4V) or current (0-21 mA), offering flexibility to support various field devices .
High-Resolution Signal Control: With 15-bit resolution across its output ranges (320 µV/bit for voltage, 650 nA/bit for current), the module provides precise analog control for demanding applications .
Onboard Diagnostics and Status Indication: The module provides status indicators such as Module Health and In Calibration Mode, enabling rapid troubleshooting and maintenance .
Seamless ControlLogix Integration: As a native 1756-series module, it installs directly into the ControlLogix chassis. It supports multiple data formats, including floating-point and integer modes, for flexible integration .
The 1756-OF4 is widely used for precise analog output control in various industries, including:
Process Control: Driving current-to-pressure (I/P) transducers for valve positioners, flow control, and pressure regulation .
Machine Control: Controlling variable frequency drives (VFDs) for speed and torque control in conveyors, mixers, and material handling equipment.
Data Retransmission: Providing signals for recorders, indicators, and data loggers .
Isolation: There is no electrical isolation between channels; the module is single-ended .
Lifecycle Status: This product is listed as Active by Rockwell Automation, with an estimated lead time of approximately 5 days
Recommended Products
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| 1756-A17 | 1794-IF4I | 1756-OF4 |
| 1756-A4 | 1794-IF8IH | 1769-IG16 |
| 1756-A7 | 1794-IG16 | 1769-IM12 |
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| 1756-CN2 | 1794-IR8 | 1769-IR6 |
| 1756-CN2R | 1794-IRT8 | 1769-IT6 |
| 1756-CNB | 1794-IRT8K | 1769-OA16 |
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