Overview
The Opto 22 PB32HQ is a high-density module rack that serves as the mounting platform for quad pak digital I/O modules in distributed I/O applications. This 32-channel rack is engineered for use with the Opto 22 B4 addressable brain board and supports up to four discrete I/O points per quad pak module. The unit features a robust 50-pin screw-type connector and compact design suitable for space-constrained industrial control panels and remote I/O installations.
Key Features
- 32-channel capacity with four-point I/O increments per quad pak module
- 50-pin screw-type header connector for secure, vibration-resistant termination
- Rack-mount design with dense footprint for efficient panel real estate usage
- Compatible with B4 brain board for networked I/O control via Pamux protocol
- Supports up to 16 brain boards on a single Pamux bus (512 total I/O points)
Technical Specifications
Operating temperature range of 0 to 70 °C at 95% relative humidity (non-condensing). The PB32HQ is configured to work with Opto 22 quad pak I/O modules, where each module houses four discrete I/O points. The system is designed for integration into larger distributed control networks via the Pamux communication protocol, allowing daisy-chaining of multiple brain boards for expanded I/O capacity.
Typical Applications
- Remote I/O racks in distributed automation systems
- Panel-mount digital input/output control in process automation
- Machine tool and equipment control networks
- Building automation and HVAC control systems
- Industrial process monitoring and sensor integration
Compatibility & Replacements
Compatible With
- Opto 22 B4 addressable digital brain board
- Opto 22 quad pak I/O modules (four-point configuration)
- Pamux communication protocol and network
- Distributed I/O applications requiring 32-channel density
Replaces / Drop-In Replacement For
The Opto 22 PB32HQ is a legacy product in the G4 I/O product family. Direct replacement models should be verified with current Opto 22 product documentation or your system integrator, as newer SNAP I/O or G4 modules may offer alternative mounting configurations.
Works With
- Opto 22 Pamux protocol for networked I/O control
- Legacy G4 I/O digital modules and accessories
- Industrial automation platforms using distributed Pamux networks





