HIMA B9302 (H51q Series 4U I/O Expansion Rack)

The B9302 is a 19-inch 4U I/O expansion rack from the H51q series of HIMA (Black Horse), designed for extending the I/O points of the H51q central rack (B5232/B5233). It is a standard expansion sub-rack for SIL3 safety systems. Basic Information

Model: B9302 (Part Number: 997009302)

Brand/series: HIMA / H51q (Compatible with H41q)

Type: I/O Expansion Rack (Sub-rack)

Safety level: SIL3, Cat.4, PL e (Certified with the system)

Positioning: Coordinated with the B5232/B5233 central rack to expand I/O capacity

Rack Specifications

Dimensions: 19-inch wide × 4U high (approximately 178mm) × 305mm deep

I/O slots: 16 I/O module slots (no CPU / power slot)

Backplane: Special I/O bus backplane, supporting redundant bus connections

Installation: 19-inch standard cabinet installation

Weight: Approximately 9kg (empty rack)

Standard Configuration (B9302 Kit)

FK1406 4U Rack: Includes cable slots, installation panel

F7553 Communication Link Module: I/O bus interface (connects to central rack)

BV7032 Data Cable:

B9302-0.5: 0.5-meter bus cable

B9302-1: 1-meter bus cable (commonly used)

Longest support for 30-meter bus extension

Core Parameters

System Bus: Redundant I/O bus (compatible with H51q redundant architecture)

Operating Voltage: 24VDC (powered by central rack)

Operating Temperature: 0°C ~ +60°C

Protection Grade: IP20

Bus Topology: Daisy chain / star, supports multi-extension rack cascading

Key Features

Special I/O Expansion: 16-slot pure I/O design, does not occupy central rack slots, significantly increases system point capacity

Redundant Bus Compatibility: Perfectly compatible with H51q fully redundant system (B5232-2/B5233-2), supports bus redundancy

Long-distance Extension: Bus cable longest 30 meters, can distribute I/O at the installation site, reduces wiring costs

Hot Swap Support: All I/O modules support hot swapping, online maintenance does not affect system operation

Wide Temperature Industrial Design: Resistant to vibration, interference, suitable for high-risk environments such as petrochemical and power industries

Typical Applications

Large SIS/ESD System: Central rack (13 slots) + multiple B9302 expansions (16 slots / each), meets 200+ point I/O requirements

Distributed I/O Deployment: Install B9302 near the field equipment, connect the bus to the central control room, simplifies wiring

H51q System Expansion: Increase I/O points in existing B5232/B5233 racks without replacing the central rack