Technical Specifications Breakdown
Key parameters for the 3300/12-01-20-00 are listed below for quick reference:
| Feature | Specification |
|---|---|
| Input Voltage (Option 01) | 95 to 125 Vac, single phase, 50 to 60 Hz, at 1.0 A maximum |
| Input Voltage (Alternate) | 190 to 250 Vac, single phase, 50 to 60 Hz, at 0.5 A maximum |
| Primary Power Surge at Powerup | 26 A peak, or 12 A rms, for one cycle |
| Fuse Rating (95 to 125 Vac) | 1.5 A slow blow |
| Fuse Rating (190 to 250 Vac) | 0.75 A slow blow |
| Transducer Power Output | User-programmable -24 Vdc, +0%, -2.5%; or -18 Vdc, +1%, -2% |
| OK Relay Type | Single-pole, double-throw (SPDT), hermetically-sealed |
| Contact Ratings (resistive load) | 5 A at 28 Vdc; 5 A at 120 Vac, 50/60 Hz; 3 A at 220 Vac, 50/60 Hz |
| Operating Temperature | 0°C to +65°C (+32°F to +150°F) |
| Storage Temperature | -40°C to +85°C (-40°F to +185°F) |
| Relative Humidity | To 95%, noncondensing |
Real-World Applications
The field-changeable input voltage (95-125 Vac or 190-250 Vac) allows the same unit to be used across different plant locations, reducing spare parts inventory. The hermetically-sealed OK relay provides a reliable dry contact for alarm systems, ensuring operators are alerted immediately if the power supply fails.
Installation & Setup Guidance
Install the 3300/12-01-20-00 in the left-most slot (position 1) of the 3300 rack. The input voltage is field-changeable via a soldered jumper and replacement of the external fuse. Ensure the correct fuse is installed for your line voltage: use a 1.5 A slow blow for 95-125 Vac, or a 0.75 A slow blow for 190-250 Vac. The power supply includes a line noise filter as standard, so no additional filtering is required.
Maintenance & Reliability
To maintain reliable operation, periodically inspect the power supply for signs of overheating or dust accumulation. The unit is designed for continuous duty in environments up to 65°C. The OK relay should be tested during routine system checks to verify proper operation. Because the relay is normally energized, a loss of power will cause it to de-energize, providing a fail-safe alarm condition.
Reliable Power for Your 3300 Monitoring System
As a maintenance engineer, you know that a stable power supply is the backbone of any critical machinery monitoring system. The Bently Nevada 3300/12-01-20-00 AC Power Supply is designed to deliver consistent, regulated power for up to 12 monitors and their associated transducers in a single 3300 rack. With its built-in line noise filter and field-changeable input voltage, this module simplifies installation and enhances system reliability.
Selection Guide & Purchasing Advice
When ordering the 3300/12-01-20-00, specify Option A=01 for 95-125 Vac input (factory default). The unit can be field-changed to 190-250 Vac if needed. For ATEX-approved installations, ensure the monitor rack is installed in a weatherproof housing. AutoDCSTech stocks this power supply and can advise on lifecycle status and availability.
Please verify current lifecycle status and availability with AutoDCSTech before ordering.
Availability & Condition at AutoDCSTech
| Part Number | 3300/12-01-20-00 |
|---|---|
| Availability | In Stock |
| Condition | New |
| Warranty | One Year |
| Origin | US |
