PCM-5350
Power Communications Monitor
An always-on, five-channel monitor that provides deep, real-time visibility into PLC system performance. Serves as a permanent diagnostic window that identifies and analyzes issues without needing to log into a transmitter-receiver or connect a test instrument.
Channels
5 independent
SOE capacity
32,768 events
Trending
Spectral captures
On‑demand + event‑driven
Always‑On System Visibility
The PCM‑5350 is a five‑channel, frequency‑selective monitor designed for continuous, read‑only observation of Power Line Carrier systems. Installed between the last hybrid and line tuner, it measures at the optimal point in the PLC chain, where reflected power, level, and frequency readings are not distorted by hybrid components. It captures real‑time and event‑driven measurements that help utility professionals diagnose mis‑operations, evaluate system performance, and track gradual channel degradation over time, all without requiring access to transmitters or receivers.
Deep Event Recording & Spectral Capture
Up to 32,768 time‑stamped events with triggers on frequency, level, reflected power, impedance, phase, and noise. Trend level, reflected power, impedance, and phase with programmable intervals. Capture and compare "as‑left" snapshots to extend maintenance cycles and reduce unnecessary truck rolls.
32,768
Event Records
6
Trigger Types
Accurate Measurements Where They Matter
The best location to measure reflected power is at the RF input of the line tuner. When hybrids are between the transmitter and tuner, reflected power readings from the transmitter are distorted. These errors are not linear, so no correction factor can compensate. In one documented case, a broken cable at the tuner read 100% reflected power at the tuner but only 4% at the transmitter behind a resistive hybrid. The PCM‑5350, installed between the last hybrid and line tuner, measures at the point that matters, before hybrid components can distort the readings.
An Independent Diagnostic Window
The PCM‑5350 serves as an independent monitoring device for the RF portion of the PLC system, much like a Digital Fault Recorder (DFR) does for power frequency equipment. It cannot affect existing protection system parameters and is not constrained by the protective settings or timers that limit what a receiver can report. This independence allows the PCM to capture raw measurements with greater sensitivity, providing early detection of problems before they impact the protection scheme.
