The Allen-Bradley SST-PFB-SLC, also cataloged as the SST-PFB-SLC Backplane Communication Module, operates as a dedicated hardware component for high-speed Profibus network interfacing within Allen-Bradley SLC 500 controller backplanes. The module provides direct backplane interface processing and DP master/slave protocol execution between the host SLC 500 rack and remote field instrumentation.
Hardware Specifications
Parameter
Specification
Model
SST-PFB-SLC
Brand
Allen-Bradley
Origin
Canada / USA
Weight
0.55 lbs
Dimensions
Standard SLC 500 Single-Slot Module
Operating Temp
0 to 60 deg C
Power Consumption
5 VDC Backplane, 750 mA
Network Protocol
Profibus DP (Master/Slave)
Number of Ports
1 x RS-485 Profibus DB9 Female Port
Host Platform
Allen-Bradley SLC 500 Controller Rack
Backplane Bus Communication Velocity and Determinism
The SST-PFB-SLC utilizes high-speed DMA backplane access to maintain deterministic data exchange between the SLC 500 CPU memory registers and the Profibus DP field network layer. Firmware flash compatibility ensures seamless backplane communication velocity and hardware clock synchronization, mitigating latency bottlenecks during cyclic I/O density scaling across distributed remote nodes.
Frequently Asked Questions
Q: What is the maximum backplane power draw for the SST-PFB-SLC module?
A: The module draws up to 750 mA directly from the 5 VDC chassis backplane bus of the host SLC 500 rack. Ensure the system power supply capacity accounts for this load.
Q: Can the SST-PFB-SLC module be inserted or removed while the SLC 500 backplane is powered?
A: No. Hot-swapping is strictly prohibited. The host SLC 500 rack must be completely powered down prior to inserting or removing the communication module to prevent backplane bus disruption or physical damage.
Q: What network interface protocol and physical port connection are available on the module?
A: The module features one 9-pin D-sub (DB9) female connector supporting RS-485 Profibus DP network communication standards.
Field Installation Guidelines
Power down the SLC 500 chassis completely before aligning the module with the slot guides of the target rack position.
Firmly slide the module into the backplane slot until the top and bottom retaining latches snap securely into place.
Connect the standard Profibus DB9 connector with integrated line termination resistors enabled at the terminal physical ends of the segment.
Ensure the Profibus cable shield is terminated to low-impedance functional earth grounding bars near the cabinet entrance to minimize high-frequency noise interference.
