1769-OF4 Allen-Bradley Compact I/O Analog Output Module
Manufacturer: Allen Bradley
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Part Number: 1769-OF4
Condition：New with Original Package
Product Type: Analog Output Modules
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Country of Origin: USA
Payment:T/T, Western Union
Shipping port: Xiamen
Warranty: 12 months
Allen-Bradley 1769-OF4 Compact I/O Analog Output Module
Configured for specific physical voltage and current command execution in industrial control networks, the Allen-Bradley 1769-OF4 (1769-OF4 Output Module) provides direct physical/electrical execution across compatible controller platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-OF4 |
| Brand | Allen-Bradley / Rockwell Automation |
| Origin | USA |
| Module Type | Compact I/O Analog Output Module |
| Number of Outputs | 4 single-ended channels |
| Output Voltage Ranges | -10 to +10 V, 0 to 10 V, 0 to 5 V, 1 to 5 V, +/-5 V |
| Output Current Ranges | 0 to 20 mA, 4 to 20 mA |
| Resolution | 14-bit (voltage), 13-bit (current) |
| Accuracy | +/-0.1% of full scale |
| Response Time | 2.5 ms per channel |
| Current Draw at 5.1V | 120 mA (145 mA max backplane draw) |
| Current Draw at 24V | 170 mA (125 mA max backplane draw) |
| Power Consumption | 2.86 W maximum heat dissipation |
| Diagnostics | Over-range and under-range detection, safe-state configuration |
| Protection | Open-circuit protection, short-circuit current supported |
| Slot Width | 1 |
| Mounting Option | DIN rail or panel mounting |
| Weight | 0.45 kg (1.00 lbs) |
| Operating Temp | 0 deg C to +60 deg C |
| Storage Temp | -40 deg C to +85 deg C |
| Relative Humidity | 5% to 95% RH, non-condensing |
| System Compatibility | CompactLogix (Bulletin 1768/1769 series), MicroLogix 1500 |
Backplane Bus Communication and Deterministic Scaling
The 1769-OF4 interfaces directly with the system backplane to receive digital command words from the master controller. The internal digital-to-analog converters (DAC) process these values into scaled analog voltage or current signals using independent configuration parameters for each terminal loop. The module utilizes backplane bus communication velocity parameters to ensure deterministic updates within the specified 2.5 ms per channel window. Hardware diagnostics constantly evaluate loop integrity, enabling real-time over-range and under-range reporting while enforcing user-configured safe-state variables during local bus faults.
Frequently Asked Questions
Q: How does the hardware respond if communication with the CompactLogix controller is lost?
A: The module executes a predefined safe-state configuration when backplane bus communication fails. Users define whether individual outputs drop to zero, hold their last value, or transition to a specific error state.
Q: Can this module be installed or removed while the system backplane is energized?
A: No. The hardware does not support online insertion and removal (RIUP). Operators must isolate the 5.1 VDC and 24 VDC power supplies feeding the backplane before seating or unseating the module slot connection to prevent permanent hardware damage.
Field Installation Guidelines
- Mechanical Positioning: Mount the hardware on an approved 35 mm DIN rail or anchor it directly to a backplate using the designated mounting screw holes. Ensure the module locks completely onto adjacent I/O modules via the integrated bus connectors.
- Electrical Grounding: Terminate all signal wiring shields at one end only to eliminate ground loops. Connect the drainage wires directly to the functional earth panel ground bus bar.
- Separation Rules: Maintain physical separation between the low-voltage analog field wiring and high-voltage AC electrical power distribution conduits to reduce induction hazards.
- Terminal Interface: Strip copper conductor wires to factory specified limits before securing them within the terminal blocks. Verify that total backplane current draw remains within the constraints of the local power supply distance rating.