Secure now: Allen-Bradley 1769-OA8 Compact AC Digital Output
Atlantechdrives provides you the 1769-OA8, a rugged 8-point digital AC output module for the CompactLogix and MicroLogix 1500 platforms. This module is specifically designed for applications requiring robust AC switching with higher current capacity per point compared to high-density modules, making it ideal for heavier solenoids and contactors.
- Outputs: 8 Digital AC Outputs (Triac)
- Current Rating: 0.5A per point @ 60°C
- Voltage Category: 100/240V AC
- Surge Current: 7A for 45ms
- Power Supply Distance: 8 modules
- Backplane Current: 145 mA @ 5.1V
Technical Performance: High-Inrush Load Management
Purchase now the 1769-OA8 to handle demanding AC loads with high inrush currents. The 1769-OA8 features a superior current rating of 0.5A per point, which is double the capacity of the 16-point version. This technical advantage allows it to drive larger AC contactors and heavy-duty solenoids that might trip the protection of high-density cards. The module utilizes Triac solid-state switching, providing an almost infinite mechanical life compared to traditional relay modules. Each of the 8 points is group-isolated, and the module features sophisticated snubber networks to suppress the back-EMF generated when inductive AC loads are de-energized. When you procure the 1769-OA8, you are gaining a reliable interface for your most critical power-switching tasks.
Expert Tips: Fusing and Group Wiring
To protect the 1769-OA8 from field-side short circuits, we strongly recommend external fusing for each output point. While the module is robust, a direct short can permanently damage the Triac. The module is arranged in one group of 8 points with two common terminals (L1 and L2/N). Ensure that your field wiring uses 14-22 AWG copper wire to maintain a low-resistance path for the AC current. Sourcing your 1769-OA8 from Atlantechdrives ensures that the internal opto-couplers and Triacs are factory-certified, providing the isolation needed to keep your CompactLogix CPU safe from AC line noise.
Maintenance and Heat Dissipation
During routine maintenance, inspect the terminal block for signs of heat discoloration. Since Triacs dissipate heat proportional to the load current, the 1769-OA8 can become warm when all 8 outputs are energized at 0.5A. Ensure the cabinet has proper airflow and that the 1769-ECR end cap is securely installed to maintain backplane stability. Sourcing from Atlantechdrives provides you with a unit that has undergone full load testing to ensure it meets original heat dissipation specifications.
FAQs
Q: What is the maximum voltage the 1769-OA8 can switch?
A: It is rated for up to 265V AC, covering both 120V and 240V nominal systems.
Q: Can it be used with the MicroLogix 1500?
A: Yes, it is fully compatible with the 1764-LRP and 1764-LSP processors via the expansion bus.
Do you need more references from this brand? Explore our full catalog of Allen-Bradley here.
For smaller AC load requirements, this 8-point output module is technically compatible with any rack powered by a 1769-PA2 system supply.
