FUJI FSB128H PLC Backplane | 10 Slot FSB Series Chassis

This backplane provides mechanical support and electrical connections for FUJI PLC modules. It houses the CPU, power supply, and I/O modules in a single chassis. Therefore, it forms the foundation for small to medium-sized control systems.

Physical and Slot Specifications

The FUJI FSB128H measures 28.0 cm in length and 12.0 cm in width. Moreover, its backplane weight equals approximately 1.05 kg for panel mounting. A 10-slot backplane provides electrical connections between all installed modules. Additionally, the backplane includes a built-in power distribution bus.

Parameter	Specification
Brand	FUJI Electric
Full Model	FSB128H
Category	PLC Backplane
Dimensions (L x W x H)	28.0 cm x 12.0 cm x 8.0 cm (11.02″ x 4.72″ x 3.15″)
Backplane Weight	1.05 kg (2.31 lbs)
Number of Slots	10 Slots (8 I/O + 1 CPU + 1 Power Supply)
Slot Type	FUJI FSB Series Compatible
Backplane Type	Passive PCB with Gold-Plated Edge Connectors
Backplane Bus	16-Bit Data Bus + 16-Bit Address Bus
Maximum I/O Points per Rack	256 Digital I/O (with Mixed Modules)
Power Supply Slot	Dedicated Leftmost Slot (FSB Power Series)
CPU Slot Location	Slot 1 (Adjacent to Power Supply)
I/O Slot Spacing	2.5 cm (0.98 inches) Center to Center
Module Keying	Yes (Mechanical Keying Pins)
On-Board Components	1 Passive Backplane PCB + 10 Injection-Molded Slot Guides + 1 Grounding Stud + 10 Edge Connectors
Energy Storage	None (No Capacitors on Backplane)
Rack Material	Cold-Rolled Steel (Powder Coated)
Mounting Type	Panel Mount (Six 6 mm Holes)
Grounding Connection	M4 Stud with Star Washer
Operating Temperature	0°C to +55°C (32°F to 131°F)
Cooling	Passive Convection (No Fans)

Rack Layout and Module Installation

The FUJI FSB128H reserves the leftmost slot exclusively for the power supply unit. Specifically, the CPU module occupies slot one immediately next to the supply. In addition, the remaining eight slots accommodate discrete or analog I/O modules. Moreover, you can install any FSB series compatible module without special tools. Furthermore, each slot includes mechanical keying pins to prevent incorrect insertion. Consequently, this backplane ensures reliable module mounting and electrical contact.

Passive Backplane and Signal Routing

This backplane uses a passive PCB without active electronic components. Specifically, gold-plated edge connectors ensure reliable signal transfer between modules. In addition, the backplane routes power, data, and address signals to all ten slots simultaneously. Moreover, the 16-bit data bus supports high-speed I/O updates. Thus, no energy storage components exist on this PCB.

Installation and Mounting Information

You will find six mounting holes on the backplane’s back panel for secure attachment. For instance, each hole accepts a 6 mm screw for panel mounting. In addition, an M4 grounding stud sits near the power supply mounting area. Moreover, the backplane includes a DIN rail adapter for optional rail mounting. Therefore, the FUJI FSB128H provides a solid foundation for FUJI PLC control systems.