Allen-Bradley SST-PFB-SLC DP Remote I/O Scanner Module
Configured for PROFIBUS DP network scanning in Allen-Bradley SLC 500 racks, the Allen-Bradley SST-PFB-SLC ( SST-PFB-SLC PROFIBUS DP Remote I/O Scanner Module) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SST-PFB-SLC |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.2 kg (Shipping Weight) |
| Dimensions | Standard Allen-Bradley SLC 500 single-slot form factor |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 3.75 W (5 VDC at 750 mA) |
| Module Type | PROFIBUS DP Remote I/O Scanner Module |
| Compatible Host System | Allen-Bradley SLC 500 Chassis |
| Network Interface | DB9 Female (RS-485 PROFIBUS DP) |
| Backplane Current Draw | 750 mA at 5 VDC |
Backplane Bus Communication Velocity & Deterministic Networks
The SST-PFB-SLC scanner card handles high-speed communication mapping between distributed PROFIBUS field devices and the internal memory structure of the SLC 500 controller processor. Operating directly across the local chassis backplane, the onboard microprocessor manages cyclically configured I/O exchanges, ensuring minimal backplane bus communication velocity latency and maintaining high I/O density scaling. The module offloads complex PROFIBUS packet generation and baud rate negotiating up to 12 Mbps, protecting host processor CPU execution cycles while maintaining deterministic fieldbus data updating.
Frequently Asked Questions
Q: What is the backplane power supply requirement for installing the SST-PFB-SLC in an SLC 500 rack?
A: The SST-PFB-SLC draws 750 mA directly from the 5 VDC backplane power bus. Ensure total chassis current consumption remains within the rated output limits of the SLC power supply.
Q: Can the PROFIBUS DB9 network cable be connected or disconnected while the module is powered?
A: While RS-485 signals are differential, plugging or unplugging DB9 connectors during active communication can induce transient noise or disrupt network segment continuity; module insertion into the SLC backplane itself requires complete rack power de-energization.
Field Installation Guidelines
- Power off the host SLC 500 chassis completely before seating the module into the target I/O rack slot.
- Align the printed circuit board edges with the chassis card guides and push the module firmly into the backplane connector until fully seated.
- Attach the DB9 PROFIBUS network cable to the front panel connector, ensuring terminal locking screws are tightened to prevent mechanical disconnection.
- Verify that bus termination resistors are enabled at both physical ends of the RS-485 PROFIBUS cable segment.
- Ground the overall cable shield to the cabinet protective earth ground bar using low-impedance bonding clamps immediately upon enclosure entry.
Allen-Bradley SST-PFB-SLC DP Remote I/O Scanner Module
Allen-Bradley SST-PFB-SLC DP Remote I/O Scanner Module
Configured for PROFIBUS DP network scanning in Allen-Bradley SLC 500 racks, the Allen-Bradley SST-PFB-SLC ( SST-PFB-SLC PROFIBUS DP Remote I/O Scanner Module) provides direct physical/electrical execution.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | SST-PFB-SLC |
| Brand | Allen-Bradley |
| Origin | USA |
| Weight | 1.2 kg (Shipping Weight) |
| Dimensions | Standard Allen-Bradley SLC 500 single-slot form factor |
| Operating Temp | 0 to 60 deg C |
| Power Consumption | 3.75 W (5 VDC at 750 mA) |
| Module Type | PROFIBUS DP Remote I/O Scanner Module |
| Compatible Host System | Allen-Bradley SLC 500 Chassis |
| Network Interface | DB9 Female (RS-485 PROFIBUS DP) |
| Backplane Current Draw | 750 mA at 5 VDC |
Backplane Bus Communication Velocity & Deterministic Networks
The SST-PFB-SLC scanner card handles high-speed communication mapping between distributed PROFIBUS field devices and the internal memory structure of the SLC 500 controller processor. Operating directly across the local chassis backplane, the onboard microprocessor manages cyclically configured I/O exchanges, ensuring minimal backplane bus communication velocity latency and maintaining high I/O density scaling. The module offloads complex PROFIBUS packet generation and baud rate negotiating up to 12 Mbps, protecting host processor CPU execution cycles while maintaining deterministic fieldbus data updating.
Frequently Asked Questions
Q: What is the backplane power supply requirement for installing the SST-PFB-SLC in an SLC 500 rack?
A: The SST-PFB-SLC draws 750 mA directly from the 5 VDC backplane power bus. Ensure total chassis current consumption remains within the rated output limits of the SLC power supply.
Q: Can the PROFIBUS DB9 network cable be connected or disconnected while the module is powered?
A: While RS-485 signals are differential, plugging or unplugging DB9 connectors during active communication can induce transient noise or disrupt network segment continuity; module insertion into the SLC backplane itself requires complete rack power de-energization.
Field Installation Guidelines
- Power off the host SLC 500 chassis completely before seating the module into the target I/O rack slot.
- Align the printed circuit board edges with the chassis card guides and push the module firmly into the backplane connector until fully seated.
- Attach the DB9 PROFIBUS network cable to the front panel connector, ensuring terminal locking screws are tightened to prevent mechanical disconnection.
- Verify that bus termination resistors are enabled at both physical ends of the RS-485 PROFIBUS cable segment.
- Ground the overall cable shield to the cabinet protective earth ground bar using low-impedance bonding clamps immediately upon enclosure entry.
