Allen-Bradley 1769-OF4CI is a high-performance 4-channel fully isolated analog output module for 1769 CompactLogix systems. Upgraded from the standard 1769-OF4, it features per-channel complete electrical isolation instead of group isolation, delivering stronger anti-interference capability, zero crosstalk and ultra-stable analog output. It is specially designed for high-noise industrial environments and high-precision process control scenarios.

Core Technical Parameter Specifications

Channel Configuration：4 fully independent, per-channel isolated analog output channels

Output Signal Type：Programmable dual-mode voltage / current output

Voltage Output Ranges：±10V, 0–10V, 0–5V, 1–5V software configurable

Current Output Ranges：0–20mA, 4–20mA standard industrial loop signals

Output Accuracy：Voltage ±0.3% FS / Current ±0.4% FS full-scale precision

Stability Performance：±0.05% nonlinearity and repeatability error

Signal Response Speed：Less than 10ms fast analog response

Isolation Grade：Per-channel 500VAC reinforced isolation (CI feature)

Built-in Protection：Short-circuit protection, overvoltage and surge resistance

External Power Supply：20.4–26.4VDC industrial regulated power

Operating Environment：0℃ ~ +60℃ continuous industrial operation

Certifications：UL, CSA, CE global industrial safety compliance

Full Channel Isolation (CI) Core Advantage & Anti-Interference Performance

The biggest difference between 1769-OF4CI and standard 1769-OF4 is the CI (Channel Isolated) full independent isolation design. Ordinary OF4 adopts group isolation, which easily causes signal crosstalk and drift in high-noise workshops. In contrast, 1769-OF4CI equips each analog channel with independent isolation circuit, completely cutting off mutual interference between channels.

This full-isolation structure effectively suppresses electromagnetic noise from inverters, motors and high-power equipment, ensuring consistent output accuracy in complex industrial environments. Each channel supports free switching of voltage and current modes via Studio 5000, adapting to multiple analog devices such as regulating valves, transmitters and frequency converters. Built-in multi-protection circuits prevent module damage from on-site wiring faults, supporting long-term stable continuous operation.

High-Precision Control & On-Site Retrofit Compatibility

AllenBradley 1769-OF4CI retains full compatibility with all 1769 Compact I/O racks and CompactLogix L2x/L3x controllers. With the same installation size and bus protocol as standard OF4, it supports plug-and-play upgrade, making it the best replacement for ordinary group-isolated analog modules in high-precision renovation projects.

Its 4-channel high-density layout optimizes cabinet space while improving system anti-interference level. It is widely used for upgrading old process control systems with unstable analog signals, solving common on-site problems such as signal drift, jitter and cross-channel crosstalk. Matched with EtherNet/IP adapters, it realizes stable and high-precision remote analog regulation for distributed automation systems.

Industrial Application Scenarios

AllenBradley 1769-OF4CI is mainly deployed in high-noise and high-precision process control scenarios, including chemical industry, environmental protection equipment, precision temperature/pressure closed-loop control, pharmaceutical production lines and high-stability flow regulation systems.

North American high-precision process OEMs adopt 1769-OF4CI for anti-interference analog control design. Latin American chemical and environmental protection factories deploy fully isolated modules to solve signal instability problems. European intelligent manufacturing projects rely on its per-channel isolation performance to improve production parameter consistency and product yield.