Overview
The Grace P-B9-H3R3 panel interface connector is designed to provide safe, external access to Allen-Bradley DH+ control systems without opening the control panel. This UL Type 4 rated connector features DB9 and 8-pin Mini-DIN combination connectors, panel mount housing, and an integrated 3-amp circuit breaker. It is ideal for technicians who need to program, debug, or communicate with AB SLC 500 and other DH+ compatible controllers while maintaining panel integrity and NFPA 70e electrical safety standards.
Key Features
- Allen-Bradley DH+ Protocol Support: DB9/8-pin Mini-DIN combination connector for direct AB controller access
- UL Type 4 Enclosure Rating: Splash and dust protection rated for industrial panel mounting
- Integrated Circuit Protection: 3-amp circuit breaker provides overcurrent and surge protection
- External Panel Mounting: Eliminates the need to open panel doors; improves technician safety and panel security
- NFPA 70e Compliant: Supports electrical safety standards by reducing hazardous live parts exposure
- Simplex Outlet Configuration: Single outlet design for dedicated DH+ programming connection
Technical Specifications
- Connector Type: DB9/8-pin Mini-DIN Combination
- Communication Protocol: Allen-Bradley DH+ (Devicenet Highway Plus)
- Enclosure Rating: UL Type 4 (splash and dust protected)
- Mounting Style: Panel Mount
- Circuit Breaker Rating: 3 Amp
- Outlet Configuration: Simplex Outlet
- Typical Operating Voltage: 120 VAC
- Certifications: UL Listed for 15A panel recognition
Typical Applications
- Control panel external programming ports for Allen-Bradley SLC 500 controllers
- Field maintenance and troubleshooting access points in industrial control enclosures
- Secure remote communication ports that comply with NFPA 70e safety standards
- Factory automation and machinery control systems requiring safe technician access
- Food & beverage, packaging, and discrete manufacturing control systems
Compatibility & Replacements
Compatible With
- Allen-Bradley SLC 500 Controllers (DH+ equipped)
- Allen-Bradley MicroLogix 1500 (DH+ capable models)
- CompactLogix and ControlLogix with DH+ protocol modules
- Any DH+ network interface or gateway
- Standard industrial control enclosures with panel cutout space
Replaces / Drop-In Replacement For
- Earlier Grace panel mount DH+ connectors without integrated circuit protection
- Legacy field-mounted DB9 programming stations
- Verify compatibility with your system integrator before ordering.
Works With
- Allen-Bradley RS Logix and Studio 5000 engineering software (DH+ module)
- ADA (Allen-Bradley DH+ Adapter) software interfaces
- Standard DH+ communication drivers and protocol stacks
- Industrial Ethernet gateways with DH+ translation capability
- Third-party SCADA and HMI platforms supporting DH+ protocols








