ABB PFEA111-20 Tension Electronics Module

The ABB PFEA111-20 3BSE050090R20, also cataloged as the PFEA111-20 Tension Electronics Module, operates as a dedicated hardware component for precise load cell signal processing within web tension measurement systems. The device conditions millivolt-level analog signals from two independent load cells, applying configurable digital filtering to suppress high-frequency mechanical vibration noise.

Hardware Specifications

Frequently Asked Questions

Q: What specific data profiles are computed by the $A+B$ and $A-B$ display modes?

A: The $A+B$ mode sums the signals from both load cells to measure total web tension across the roll, compensating for uneven material alignment. The $A-B$ differential mode monitors the tension imbalance between the drive side and the operator side, identifying structural web steering or roll skewing issues.

Q: Can the internal signal filtering parameters be adjusted during active production?

A: Yes. The module features adjustable digital filtering settings that allow field engineers to modify the low-pass cut-off frequency during runtime. This adjustment optimizes signal quality by dampening high-frequency mechanical resonance from machine bearings without interrupting active current loop outputs.

Field Installation Guidelines

• DIN-Rail Mounting and Thermal Clearance: Snap the 0.2 kg compact housing onto a standard 35 mm DIN rail inside the instrument cabinet. Maintain a minimum 20 mm vertical clearance boundary from adjacent terminal blocks or power supplies to ensure adequate convective air cooling through the IP20 ventilated enclosure.
• Load Cell Signal Cable Shielding: Terminate the millivolt-level wires from the load cells using twisted, shielded pairs. Ground the outer cable shield braid exclusively at the designated PFEA111-20 grounding clamps to suppress high-frequency electrostatic noise and prevent measurement drift.
• Analog Output Routing and Segregation: Route the 4-20 mA current and 0-10 V voltage output lines inside separate low-voltage wireways. Keep these instrumentation lines completely isolated from high-current AC motor supply conductors or inductive brake circuits to eliminate electromagnetic cross-talk.