ALLEN BRADLEY 1769-L32C CompactLogix Controller
Configured for deterministic process execution and distributed I/O control in CompactLogix architectures, the ALLEN BRADLEY 1769-L32C (1769-L32C Processor Module) provides direct physical/electrical execution. The controller manages up to 16 local 1769 Compact I/O modules across two I/O banks using an embedded 750 KB to 1.5 MB user memory structure. Featuring an integrated ControlNet port alongside an RS-232 serial interface, the unit executes scheduled peer-to-peer data transfers, logic processing, and field device synchronization without relying on external network gateway hardware.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-L32C |
| Brand | ALLEN BRADLEY |
| Origin | USA |
| Weight | 0.40 kg |
| Dimensions | 118 x 87 x 90 mm |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 5.0 W power dissipation |
| Controller Memory | 750 KB / 1.5 MB configurable |
| Communication Ports | 1 x ControlNet, 1 x RS-232 serial |
| Local I/O Capacity | Up to 16 local 1769 Compact I/O modules |
| Isolation Voltage | 30 V continuous |
| Power Supply Distance Rating | 4 modules from power supply |
Deterministic Network Performance & Backplane Velocity
The 1769-L32C transfers application logic over backplane bus communication velocity frameworks while maintaining strict cycle times across ControlNet networks. The controller coordinates high-speed I/O density scaling and cyclic data exchanges via scheduled implicit messaging. Firmware flash compatibility across Series A and Series B revisions allows direct integration with RSLogix 5000 and Studio 5000 Logix Designer software, preserving task execution integrity without dropping packet transmissions during heavy network load states.
Frequently Asked Questions
Q: What is the maximum number of local I/O expansion banks supported by the 1769-L32C?
A: The 1769-L32C supports a maximum of 16 local 1769 I/O modules distributed across up to 2 expansion banks, requiring a 1769 expansion cable and a dedicated power supply for the second bank.
Q: Can the 1769-L32C be installed or removed under power?
A: No, the 1769 backplane bus does not support hot-swapping (RIUP). Power to the backplane assembly must be completely isolated prior to mounting or removing the controller.
Field Installation Guidelines
Mount the 1769-L32C securely onto an IEC standard DIN rail or directly to a panel backplate using the mounting feet. Ensure the module is positioned within 4 slot locations of the 1769 power supply to comply with the bus power distance rating specifications.
Connect the ControlNet cable to the front BNC connector, ensuring proper coaxial cable shielding and 75 Ohm tap termination at both ends of the segment. Route all RS-232 serial cabling and network connections away from high-voltage AC lines and motor drives to prevent noise induction. Connect copper field wiring (22 to 14 AWG solid or 22 to 16 AWG stranded) to associated I/O modules and verify panel grounding complies with local industrial standards.
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| Warranty | 12 Months |
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