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Key Technical Specifications
| Parameter | Value / Specification |
| Catalog Number | 1769-OF2 |
| Number of Outputs | 2 single-ended channels |
| Output Ranges (Voltage) | ±10V DC, 0 to 10V DC, 0 to 5V DC, 1 to 5V DC |
| Output Ranges (Current) | 0 to 20 mA, 4 to 20 mA |
| Digital-to-Analog Resolution | 14 bits (unipolar), 13 bits plus sign (bipolar) |
| Conversion Response Time | < 2.9 ms (to 95% of full scale) |
| Backplane Current Draw | 120 mA @ 5.1V DC, 120 mA @ 24V DC |
| Power Dissipation | 2.84 W |
| Bus Power Supply Distance | 5 modules (must be within 5 slots of a 1769 power supply) |
| Isolation Voltage | 500V AC continuous, channels-to-backplane (no channel-to-channel isolation) |
| Removable Terminal Block | 1769-RTBN18 (18-point finger-safe screw terminal block) |
| Operating Temperature | 0 to 60°C (32 to 140°F) |
Product Introduction & Supply Chain Strategy
This product is a Brand New Surplus unit. It is not used, not pulled from a decommissioned plant, and not refurbished. All modules undergo rigorous quality verification to ensure OEM-level reliability. The Allen-Bradley 1769-OF2 is a compact, 2-channel analog output module designed for CompactLogix and MicroLogix 1500 systems. It delivers high-accuracy output signals to control speed references on Variable Frequency Drives (VFDs), position control valves, and regulate heating elements.
Maintaining this module as New Surplus provides a crucial operational buffer for continuous processing lines. Refurbished analog output cards pose notable risks: second-hand modules often retain heat-stressed Digital-to-Analog Converters (DACs) and degraded internal voltage references. These worn components cause calibration drift, output signal jitter, or command offsets that lead to inaccurate valve positioning and process instability. Installing factory-fresh New Surplus hardware guarantees full 14-bit resolution accuracy, reliable signal retention, and optimal Total Cost of Ownership by averting production quality defects.
1769-OF2
1769-OF2
Installation & Configuration Guide
1.Pre-Installation (Prep & Safety):Safety warning: De-energize backplane and external 24V field power before terminal block removal.
Isolate main AC/DC backplane power and external field power loops using Lock-Out/Tag-Out (LOTO) procedures. Wear a grounded anti-static wrist strap. Photograph the 18-point Removable Terminal Block (RTB) wiring harness to maintain exact channel polarity during replacement.
2.Removal:
Unlatch the top and bottom RTB retaining clips and pull the terminal block forward from the 1769-OF2 housing. Slide the bus locking levers on adjacent modules open to release the backplane interconnect pins. Carefully pull the module straight forward off the 35 mm DIN rail.
3.Installation (Clone & Seat):
Unpack the New Surplus 1769-OF2 module within an ESD-protected workstation. Align the rear track onto the 35 mm DIN rail, push flush against the adjacent module, and lock both top and bottom bus levers to engage backplane contacts. Reattach the RTB wiring harness firmly into its slot.
4.Power-On & Testing:
Restore backplane and field power. Confirm the OK LED illuminates solid green, indicating proper backplane initialization. In Studio 5000 / RSLogix 5000, verify the module configuration matches the channel output ranges (e.g., 4–20 mA or 0–10V), command a 50% scale signal, and verify terminal output using a calibrated multimeter.
Firmware/Software Versions & Upgrade Notes
- Software Support: Programmed using RSLogix 5000 / Studio 5000 (CompactLogix) or RSLogix 500 (MicroLogix 1500).
- Channel Configuration: Signal ranges (Voltage vs. Current) are software-configured per channel in the module properties tree during controller download—no physical DIP switches are required.
- Power Supply Distance: The 1769-OF2 has a Power Supply Distance Rating of 5. It must be located within 5 slots of a 1769 power supply (e.g., 1769-PA2, 1769-PA4, 1769-PB2, or 1769-PB4).
Frequently Asked Questions (FAQ)
What is the main difference between the 1769-OF2 and the 1769-OF4?
The 1769-OF2 provides 2 analog output channels, whereas the 1769-OF4 provides 4 analog output channels. Both modules support identical voltage (±10V, 0–10V) and current (0–20 mA, 4–20 mA) ranges at 14-bit resolution.
Why choose New Surplus over a refurbished 1769-OF2 module?
Refurbished analog modules often suffer from degraded output transceivers and thermal stress on internal digital-to-analog converter chips. These defects can lead to output signal drift over time, causing a VFD to run slightly off-frequency or a control valve to stay partially open. Buying New Surplus ensures zero operational hours, factory calibration precision, and full operating life.
Are these 1769-OF2 modules genuine Allen-Bradley products?
Yes. We strictly guarantee that every 1769-OF2 module supplied is 100% Original OEM New Surplus. Sourced from audited distributor excess, panel builder overstock, and canceled project reserves, each module undergoes visual, backplane handshake, and channel output testing before shipment.
Does the 1769-OF2 require an external 24V DC power supply?
The 1769-OF2 draws its operating power directly from the 1769 backplane bus (120 mA @ 5.1V DC and 120 mA @ 24V DC), supplied by the chassis 1769 power supply. However, external field devices connected to the outputs may require independent loop power depending on the wiring topology.
What warranty is included with this New Surplus module?
All New Surplus 1769-OF2 modules are backed by our full 1-year replacement warranty. If any functional hardware failure or channel calibration issue occurs under standard operating conditions within 12 months, we will replace the module immediately from our stock.
