The ABB PFSK170, also cataloged under manufacturing part number 22050788, operates as a dedicated hardware component for safety-critical signal monitoring, real-time emergency shutdown, and discrete safety loop execution within high-reliability automation and machine safety systems.
Hardware Specifications
Parameter
Specification
Model
PFSK170
Part Number
22050788
Brand
ABB
Origin
Sweden / Switzerland
Product Type
Safety I/O PLC Module
Dedicated Safety Inputs
4 x 2 channels (Dual-channel configuration)
Dedicated Safety Outputs
4 x 2 channels (Dual-channel configuration)
Operating Supply Voltage
24 VDC
Enclosure Ingress Rating
IP20 (Standard protection)
Mounting Orientation
Standard DIN rail or panel mount layout
Physical Dimensions
102 mm x 45 mm x 119 mm
Operating Temperature
-25 to +60 deg C
Net Module Weight
0.2 kg (0.44 lbs)
High Reliability Safety Control and Dual-Channel Fail-Safe State Execution
The PFSK170 monitors safety-instrumented functions (SIF) using a redundant 4 x 2 channel matrix. To maintain structural compliance with industrial safety standards and achieve fail-safe state execution, the inputs and outputs are hardwired in dual-channel configurations that execute cross-channel diagnostics continuously. This internal checking detects short circuits, cross-talk, and ground faults across the 24 VDC sensor loops within milliseconds. If a fault or line break is registered on either parallel channel, the module isolates the compromised loop and forces the respective safety outputs into their de-energized fail-safe state execution mode. This action prevents unexpected machine motion or dangerous process conditions without disabling uncompromised safety racks.
