ABB PFXC141
ABB PFXC141 - Image 2

ABB PFXC141

Product Brief:​ The PFXC141 (PFX = Pressductor Accessory / eXpansion / Connection) is an accessory component used with ABB Pressductor® tension systems. Most commonly it is a weatherproof junction/splicing box with built-in test points and bridge-completion terminals​ for connecting one or two PillowBlock load cells (PFRL) to the amplifier (PFSA140/PFTL301E), or a summing card​ that algebraically sums the two PillowBlock signals (since total web tension = sum of left + right PillowBlock forces). It may also provide calibration test sockets to inject a known mV signal for loop verification without applying physical load. Exact function depends on system design — in typical 2-PillowBlock measuring roll system, a summing junction box (PFXC…) combines SG signals before sending to PFSA140/PFTL301E.

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Category: SKU: ABB PFXC141

Description

ABB PFXC141

  • Technical Specifications (typical summing/junction box):
    • Function: Parallel summation of two 350 Ω SG bridges (PFRL x2) → single output to amplifier; OR direct pass-through with test points
    • Terminals: Screw / spring-cage; accepts 0.5–2.5 mm²
    • Enclosure: IP65 polycarbonate or die-cast aluminum (field-mount near measuring roll)
    • Test Points: 2 mm banana jacks or screw terminals for measuring bridge output / injecting calibration signal
    • Operating Temp.: –20 °C to +60 °C
    • Cable Glands: PG or M-type; sized for sensor & amplifier cables
  • Functional Features:
    • Simplifies field wiring — only one cable from junction box to amplifier (vs. two from each PillowBlock)
    • Built-in calibration test sockets — inject 2 mV (simulating %FS) to verify amplifier & readout without load
    • Strain-relief cable glands protect sensor cables in harsh mill environment
  • Application Scenarios:
    • Paper machine measuring roll — two PFRL101C PillowBlocks → PFXC141 summing box → PFTL301E in control room
    • Steel strip mill — vertical mount PillowBlocks → summing box in nearby junction cabinet → PFSA140
    • Retrofit — replace old terminal strip with PFXC141 to get test points & better strain relief
  • Material & Structure / Working Principle / Installation / Precautions:
    • Mount as close to PillowBlocks as practical (minimize unshielded sensor lead length)
    • Wire Left PillowBlock SG+ / SG– / EX+ / EX– to terminals L+ / L– / E+ / E–; Right PillowBlock to R+ / R– / E+ / E–; Output to amplifier on OUT+ / OUT– / EX+ / EX– per diagram (summing achieved by paralleling bridges — requires identical rated sensors)
    • Verify shield drain wire grounding — typically shield grounded at amplifier end; drain wire in junction box connected to ground terminal (linked to PE) but NOT to signal common
    • Precaution:​ Only sum identical sensors (same rated load, same bridge resistance, same mV/V) — mismatched sensors cause incorrect total tension. After wiring perform “simulated load test” — inject known mV via test points → verify amplifier reads correct %FS → then do mechanical zero with roll installed.
    • Keep cover gasket sealed in wash-down / dusty environments — moisture in junction box can corrode terminals → zero drift

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