Product Core Brief
- Model: PFSK164 3BSE021180R1
- Brand: ABB
- Series: ABB safety relay / machine safety module
- Core Function: Monitors emergency-stop circuits, safety gates, and light curtains, then safely disconnects hazardous loads.
- Product Type: Safety relay module
- Key Specs: SIL 3 / PL e | 4 safety contacts (2NO+2NC) | 6A/250VAC | <20ms response | DIN-rail
- Condition: New Surplus / New Original (subject to available stock)
Product Introduction
The ABB PFSK164 3BSE021180R1 is a safety relay module designed for machine protection and safety-critical control circuits. It monitors emergency-stop buttons, safety doors, light curtains, and other safety sensors, then forces safe shutdown of motors, drives, or actuators when a fault is detected.
This unit uses redundant, self-monitoring channels with forced-guided contacts to maintain safety integrity even after an internal component failure. It supports single- or dual-channel wiring, provides LED status indication, and is typically rated for SIL 3 / PL e with a response time under 20 ms.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Model | PFSK164 3BSE021180R1 |
| Product Type | Safety relay module |
| Safety Rating | SIL 3, PL e |
| Safety Contacts | 4 (2NO + 2NC) |
| Contact Capacity | 6 A / 250 VAC |
| Response Time | < 20 ms |
| Supply Voltage | 24 VDC / 110–230 VAC (verify per nameplate) |
| Installation | DIN-rail |
| Protection Rating | IP20 |
| Operating Temperature | -25 °C to +55 °C |
| Dimensions | ~45 × 99 × 121 mm |
| Weight | ~300 g |
Note: Supply voltage variants and certification details must be confirmed from the physical nameplate and OEM documentation.
Quality Control Process
- Verify PFSK164 3BSE021180R1 on the nameplate and confirm the supply voltage variant.
- Inspect DIN-rail clip, terminal screws, housing, and contact labels for damage.
- Apply the correct supply voltage and verify LED status indicators.
- Test safety channel inputs and forced-guided contact operation with a multimeter.
- Confirm reset behavior, dual-channel monitoring, and anti-static packaging before dispatch.
Replacement Pitfall Guide
- Don’t substitute it with a standard relay. A standard relay does not provide forced-guided contacts, redundancy, or SIL-rated monitoring.
- Match the supply voltage. This module may be listed for 24 VDC or 110–230 VAC variants; the wrong supply can prevent operation or damage the unit.
- Check contact ratings. The 6 A / 250 VAC rating must cover the connected safety loads; undersized contacts will shorten life or cause weld faults.
- Wire channels correctly. Single-channel and dual-channel modes behave differently; incorrect wiring can mask faults or prevent safe reset.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| ABB PFSK164 3BSE021180R1 | ABB PFSK164 3BSE021180R1 | Direct | Match supply voltage variant and contact configuration. |
| ABB PFSK164 3BSE021180R1 | ABB safety relay module | Needs Adaptation | Verify SIL level, contact count, response time, and wiring. |
| ABB PFSK164 3BSE021180R1 | Standard industrial relay | Not Recommended | Lacks SIL 3 monitoring and forced-guided contact safety logic. |
Benchmark notes:
- Safety performance: SIL 3 / PL e, response time < 20 ms.
- Output capability: 4 safety contacts (2NO + 2NC), 6 A / 250 VAC.
