Process Control Solution — Allen-Bradley 1769-OF4CI | Compact I/O Series
Where This Product Is Used
The Allen-Bradley 1769-OF4CI is a 4-channel analog current output module engineered for demanding process control environments where signal isolation is non-negotiable. Engineers deploy this module across a wide range of industrial applications:
- Chemical & Petrochemical Plants — Driving control valves, variable-speed drives, and positioners in hazardous-area loops where ground-loop isolation prevents costly measurement errors.
- Water & Wastewater Treatment — Modulating pump speed references and dosing valve positions via 4–20 mA signals with full channel-to-channel isolation to eliminate interference between loops.
- Oil & Gas Upstream/Midstream — Controlling pressure regulators and flow control valves in wellhead automation panels and pipeline SCADA systems.
- Food & Beverage Processing — Precise temperature and flow setpoint delivery to PID-controlled heat exchangers and CIP skids.
- Pharmaceutical Manufacturing — Isolated analog outputs for bioreactor agitator speed, pH dosing, and clean-steam valve control in GMP-compliant environments.
- Power Generation & Utilities — Turbine governor setpoint signals and excitation control references where isolation prevents ground faults from propagating into the control system.
- Automotive Assembly — Servo drive speed references and robotic welding current control in high-EMI production environments.
Technical Specifications
| Parameter | Specification |
|---|---|
| Catalog Number | 1769-OF4CI |
| Series | Compact I/O |
| Manufacturer | Allen-Bradley / Rockwell Automation |
| Number of Output Channels | 4 |
| Output Signal Type | Current (4–20 mA, 0–20 mA) |
| Isolation | Channel-to-channel & channel-to-backplane isolated |
| Resolution | 16-bit (including sign bit) |
| Output Range | 0–20 mA / 4–20 mA (software selectable per channel) |
| Maximum Load Resistance | 750 Ω |
| Accuracy | ±0.1% of full scale at 25 °C |
| Temperature Drift | ±50 ppm/°C |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Relative Humidity | 5–95% non-condensing |
| Power Consumption (5 VDC bus) | 120 mA |
| Power Consumption (24 VDC field) | Externally supplied per channel |
| Module Width | Single-slot Compact I/O |
| Weight | Approx. 180 g |
| Compatible Controllers | MicroLogix 1500, CompactLogix (1769 bus) |
| Programming Software | RSLogix 500, Studio 5000 Logix Designer |
Why Engineers Specify This Model
- True Channel Isolation — Each output channel is galvanically isolated from every other channel and from the backplane, eliminating ground loops that corrupt analog signals in multi-loop installations.
- 16-Bit Resolution — Delivers 65,536 discrete steps across the output range, enabling sub-microamp setpoint precision for tight PID control.
- Software-Selectable Ranges — Switch between 0–20 mA and 4–20 mA per channel in firmware without hardware jumpers, reducing commissioning time and spares complexity.
- Open-Wire Detection — The module reports broken field wiring faults back to the controller, enabling predictive maintenance and reducing unplanned downtime.
- Compact I/O Ecosystem — Slots directly into any 1769 bus system alongside digital, analog input, and specialty modules, minimising panel footprint.
- Proven Field Reliability — Widely deployed in process industries since its introduction; extensive installed base means readily available technical documentation and trained integrators.
Complete System Bill of Materials
A typical Compact I/O analog output node using the 1769-OF4CI includes the following components:
- 1769-OF4CI — 4-channel isolated analog current output module (this item)
- 1769-L33ER or 1769-L24ER-QB1B — CompactLogix controller (1769 bus host)
- 1769-PA2 — 120/240 VAC power supply for Compact I/O bus
- 1769-ECR — Right-end cap (required to terminate the 1769 bus)
- 1769-CRR3 — Right-to-right bus connector (for multi-bank expansion)
- 1492-CABLE010X — Pre-wired cable for 1769 analog module wiring (optional)
- 24 VDC Field Power Supply — External supply for loop power (e.g., 1606-XLP95E)
- Studio 5000 Logix Designer — Programming and configuration software
Compliance & Industry Standards
- CE Marking — Complies with EU Low Voltage Directive and EMC Directive
- UL Listed — UL 508 (Industrial Control Equipment)
- CSA Certified — CSA C22.2 No. 142
- RoHS Compliant — Restriction of Hazardous Substances Directive 2011/65/EU
- ATEX / IECEx — Suitable for use in Zone 2 / Class I Div 2 when installed per Rockwell Automation installation instructions
- IEC 61131-2 — Programmable controllers: equipment requirements and tests
Quality Assurance & Sourcing
Konmask.com sources the 1769-OF4CI exclusively from verified supply-chain partners with documented traceability. Every unit offered undergoes the following before dispatch:
- Visual inspection against Rockwell Automation OEM packaging and label standards
- Firmware version verification where applicable
- Functional power-on test confirming module self-diagnostics pass
- Anti-static packaging with humidity indicator card for transit protection
We do not list, sell, or knowingly source counterfeit or refurbished-as-new components. All units are accompanied by a Konmask inspection certificate upon request.
How to Source This Part
- Add to Cart — Click the purchase button above to place an order directly on Konmask.com.
- Request a Quote — For volume orders (>5 units) or project BOM pricing, email support@konmask.com with your quantity and required delivery date.
- Lead Time — In-stock units ship within 1–3 business days. Out-of-stock units are sourced within 7–15 business days depending on supply-chain availability.
- Export & Cross-Border — We support international shipments with full commercial invoice and HS code documentation (HS 8537.10).
- Payment — T/T bank transfer, PayPal, and major credit cards accepted. Net-30 terms available for approved corporate accounts.
Application-Specific FAQ
Q: Can the 1769-OF4CI drive a 4–20 mA loop-powered transmitter directly?
A: No. The 1769-OF4CI is a sourcing current output module — it sources current into the field device. Loop-powered (2-wire) transmitters are input devices; for analog inputs use the 1769-IF4 or 1769-IF8.
Q: What is the maximum cable length for the analog output wiring?
A: Rockwell Automation recommends shielded twisted-pair cable up to 30 m (100 ft) for optimal noise immunity. Longer runs are possible with proper shielding and grounding practices.
Q: Is the 1769-OF4CI compatible with MicroLogix 1500?
A: Yes. The module is compatible with any controller that supports the 1769 Compact I/O bus, including MicroLogix 1500 and all CompactLogix platforms.
Q: How do I configure the output range (0–20 mA vs 4–20 mA) per channel?
A: Output range is configured in the module’s I/O configuration dialog within RSLogix 500 or Studio 5000 Logix Designer — no hardware jumpers required.
Q: What happens to the outputs on controller fault or communication loss?
A: The module supports configurable fault-state and program-mode output values. You can set each channel to hold last state, go to a defined safe value, or ramp to zero — configured in the module properties.
Q: Do you provide a Certificate of Conformance (CoC)?
A: Yes. A Konmask inspection certificate is available upon request. For OEM CoC from Rockwell Automation, please contact us and we will advise based on unit provenance.
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