Overview
Specification
| Specification | Details |
|---|---|
| Model Number | 133388‑01 |
| Module Type | 3500/53 Overspeed Detection Module |
| Compatible System | Bently Nevada 3500 Machinery Protection System |
| Input Signal Range | +10.0 V to ‑24.0 V |
| Input Impedance | 20 kΩ |
| Supported Sensors | Proximity Probe, Magnetic Pickup |
| Speed Range | 1 to 99,999 RPM |
| Speed Accuracy | ±0.1 rpm < 100 rpm; ±1 rpm 100–10,000 rpm; ±0.01% >10,000 rpm |
| Output Relay Type | Single Pole Double Throw (SPDT) |
| Relay Contact Ratings | DC: 120 W max; AC: 600 VA max |
| Max Switched Current | 5 A |
| Min Switched Current | 100 mA @ 5 Vdc |
| Max Switched Voltage | DC: 30 Vdc; AC: 250 Vac |
| Transducer Power Supply | ‑24 Vdc, 40 mA max |
| Transducer Output Impedance | 550 Ω |
| Recorder Output | +4 to +20 mA proportional to rpm |
| Power Consumption | ~8.0 W typical |
| Operating Temperature | ‑30 °C to +65 °C |
| Storage Temperature | ‑40 °C to +85 °C |
| Humidity | 95% non‑condensing |
| Mounting | Insert into 3500 series rack slot |
| Voting Support | Supports 2‑of‑2 or 2‑of‑3 redundant configurations |
| LED Indicators | OK, TX/RX, Bypass, Test Mode |
FAQ
It monitors speed and triggers protective actions when rotational speed exceeds configured safe limits.
Q2: Which sensors can be connected to this module?
It supports proximity probes and magnetic target pickups for versatile speed sensing.
Q3: How accurate is the speed measurement?
Speed accuracy reaches ±0.01% at high RPM ranges with defined accuracy bands across lower ranges.
Q4: Can the module operate in a redundant configuration?
Yes, it can be used in 2‑of‑2 or 2‑of‑3 voting systems for enhanced reliability.
Q5: What output types does the module provide?
It offers relay outputs for trip signaling and 4‑20 mA proportional outputs for monitoring.
Q6: What environmental conditions can it withstand?
It operates reliably from ‑30 °C to +65 °C with high humidity tolerance in industrial settings.
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