Allen-Bradley 1769-OB16P CompactLogix Output Module
The Allen-Bradley 1769-OB16P, also cataloged as the 1769-OB16P Output Module, operates as a dedicated hardware component for solid-state 24 VDC digital signal execution within CompactLogix control platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 1769-OB16P |
| Brand | Allen-Bradley |
| Origin | United States |
| Weight | 0.56 lbs (0.26 kg) |
| Dimensions | Standard CompactLogix 1769 Form Factor |
| Operating Temp | 0 to +60 deg C |
| Power Consumption | 160 mA Backplane Current at 5.1 VDC (~4.5 W Power Dissipation) |
| Output Type | 16 Sourcing Solid-State DC Outputs (1 Group) |
| Operating Voltage Range | 20.4 to 26.4 VDC (5 to 30 VDC Nominal Category) |
| Output Current per Point | 0.50 A at 60 deg C (1.0 A at 30 deg C Peak Rating) |
| Continuous Current per Module | 4.0 A at 60 deg C (8.0 A at 30 deg C Maximum) |
| Output Delay Time | OFF to ON: 1 ms / ON to OFF: 2 ms |
| Surge Current Limit | 2 A for 10 ms (Repeatable Every 2 s) |
| Circuit Protection | Integrated Electronic Short-Circuit Auto-Reset Protection |
| Power Supply Distance Rating | 8 Modules |
| Isolation Voltage | 75 VDC Continuous Channel-to-Backplane |
Backplane Bus Communication Velocity & Determinism
The Allen-Bradley 1769-OB16P maintains deterministic data exchange across the local 1769 bus, consuming 160 mA at 5.1 VDC backplane current. Internal logic processing updates all 16 sourcing channel states rapidly, delivering an OFF-to-ON response time within 1 ms and ON-to-OFF within 2 ms. The module coordinates real-time status reporting directly to CompactLogix and MicroLogix 1500 processors, preserving backplane bus communication velocity across scaled I/O banks up to the maximum power supply distance rating of 8 modules. Firmware flash compatibility ensures seamless backplane bus handshake operations across hardware series revisions.
Frequently Asked Questions
Q: How does the integrated electronic short-circuit protection operate during a field wiring fault?
A: The onboard electronic short-circuit protection detects overcurrent conditions on individual sourcing channels and shuts down the affected output point to prevent module damage, automatically resetting once the fault condition clears and circuit temperature cools.
Q: What is the maximum allowable distance between this module and the CompactLogix system power supply?
A: The 1769-OB16P has a power supply distance rating of 8 modules, requiring placement within 8 slots of a 1769 system power supply to maintain proper backplane bus voltage levels.
Field Installation Guidelines
Switch off system backplane power and field-side supply sources before mounting or removing the module from the DIN rail assembly. Secure the module housing using the integrated panel-mount screw holes or DIN rail locking latches. Wire field connections to the removable terminal block using 22 to 14 AWG solid or stranded copper wire. Route field DC output signal lines away from high-voltage AC power conductors and variable frequency drive cables to suppress electromagnetic interference. Ensure proper grounding of the DIN rail to guarantee signal isolation up to the 75 VDC continuous rating.
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