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Key Technical Specifications
- Part Number: 3300/03-03-06 (330003-03-06)
- Product Name: 3300/03 System Monitor, Dynamic Data Interface (DDI) version
- Function: Central monitor for 3300 rack; provides common functions, alarm setpoint adjustment, Keyphasor distribution, and DDI/SDI communications
- Rack Position: Slot 2 (must be installed next to the 3300/12 power supply)
- Supply Voltage (from 3300/12 PIM):
- +VRH: 23.65 ± 6.35 Vdc
- +VRL: 11.22 ± 3.09 Vdc
- +7.5V: 7.5 ± 0.1 Vdc
- +5V: 5.00 ± 0.05 Vdc
- REF: 5.00 ± 0.009 Vdc
- -7.5V: -7.5 ± 0.1 Vdc
- -VT: user-selectable -18 Vdc or -24 Vdc option
- Power Consumption: ~2 W base; ~4.6 W with interface options installed
- Data Interfaces:
- Dynamic Data Interface (DDI): proprietary Bently Nevada protocol, RS422/RS232, up to 38.4 kbaud
- Serial Data Interface (SDI): Modbus or Allen‑Bradley DF1, up to 19.2 kbaud
- Keyphasor Inputs: Up to 4 proximity probe Keyphasor signals, 60–30,000 cpm
- Keyphasor Power: User-programmable -18 Vdc or -24 Vdc, short-circuit protected
- Communications Ports: RS232 and RS422, daisy-chain capable to next rack
- OK Relay: 1× SPDT, normally energized; 5 A at 28 Vdc / 120 Vac (standard)
- Front Panel Indicators: SUPPLIES OK LED, TRIP MULTIPLY LED, DATA INTERFACE OK LED, internal supply status LEDs
- Front Panel Controls: Up/Down alarm setpoint switches, RESET switch
- Environmental – Operating Temp: 0 °C to +65 °C (+32 °F to +149 °F)
- Environmental – Storage Temp: -40 °C to +85 °C (-40 °F to +185 °F)
- Humidity: 0–95% noncondensing
- Approvals (typical): CSA, ATEX options depending on suffix; hazardous area Class I Div 2 configurations available
- Dimensions / Weight: 1 rack position; approx. 0.9 kg (2.2 lb)
Product Introduction
The Bently Nevada 3300/03-03-06 (330003-03-06) is a 3300/03 System Monitor module with the Dynamic Data Interface (DDI) option for GE/Bently Nevada 3300 machinery monitoring racks. It lives in slot 2 next to the 3300/12 power supply and handles rack-wide functions: alarm setpoint adjustment, Keyphasor power and distribution, OK relay logic, and communications to DCS/PLC or Bently Nevada software via DDI and SDI.
This specific -03-06 configuration is used in legacy 3300 installations where plants need a direct replacement for an existing DDI-enabled system monitor without redesigning the rack or comms architecture. It maintains the same jumper options, front-panel controls, and backplane interface as the original, so like-for-like swaps are straightforward as long as the -VT and data interface jumpers match the old card.
3300/03-03-06
3300/03-03-06
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No LEDs on, rack shows “no comms” | No 24 VDC to rack, blown PIM fuse, or module not seated | ✅ High | Measure 24 VDC at 3300/12 PIM input terminals; check rack fuse; reseat 3300/03 in slot 2 | Restore rack power; if still dead, suspect PIM or backplane before blaming the monitor |
| SUPPLIES OK LED off, internal supply LEDs show one off | Internal DC rail failure on 3300/03 or bad backplane contact | ✅ High | Slide front panel, check internal supply LEDs (+VRH, +VRL, +5V, etc.); measure corresponding voltages at backplane if accessible | If one rail is out and reseating doesn’t help, module likely failed; replace with known-good 3300/03 |
| DATA INTERFACE OK LED off, DCS/SCADA sees no data | DDI/SDI hardware fault, wrong jumper config, or comms cable issue | ✅ High | Verify RS422/RS232 cabling; check baud rate and protocol jumpers per manual; try loopback or known-good cable | Correct jumper settings first; if LED stays off with good cabling, suspect DDI/SDI board inside the 3300/03 |
| All monitors in rack show “NOT OK”, OK relay de-energized | System Monitor detecting transducer fault or rack inhibit active | ✅ Medium-High | Check OK LED on each monitor; verify Rack Inhibit contact on PIM is open; inspect transducer wiring for shorts/opens | Fix field wiring or transducer issues; clear rack inhibit; only replace 3300/03 if OK relay misbehaves with all inputs verified good |
| Keyphasor signals missing at front-panel BNCs | Keyphasor power (-VT) mismatch or failed Keyphasor input stage | ✅ Medium | Measure -VT at PIM (should be -17.4 to -18.3 Vdc or -23.2 to -24.2 Vdc per option); check Keyphasor BNC with oscilloscope while machine runs | Ensure -VT jumpers in 3300/03 and 3300/12 match; if power is good but no signal, module’s Keyphasor section may be faulty |
If you’re stuck, send photos of the rack layout, front-panel LED status, and a screenshot of the DDI/SDI comms config. That usually narrows it down fast.
Frequently Asked Questions (FAQ)
Q: What does the “-03-06” mean in 3300/03-03-06?
A: In the 3300/03 ordering code, the first “03” indicates a Dynamic Data Interface (DDI) system monitor (vs. 01 = basic, 02 = SDI only). The “06” refers to the agency approval / option set for that specific build. Always match at least the “03” (DDI) when replacing; the approval suffix can differ if your site doesn’t require the same hazardous-area certification.
Q: Can I use a 3300/03-01 or -02 in place of a -03-06?
A: Electrically and mechanically, yes—they all fit slot 2 and work in a 3300 rack. But you’ll lose DDI functionality if you drop to a -01 or -02, and your host system (DM2000, TDM, etc.) will stop receiving dynamic data. For a true like-for-like swap, match the “03” (DDI) option.
Q: Is this module hot-swappable?
A: No. The 3300 system is not designed for hot-swapping the System Monitor. Removing or inserting the 3300/03 under power can cause rack-wide alarms, comms drops, or even damage the backplane. Always shut down the 24 VDC to the rack before swapping this card.
Q: Do I need to reconfigure jumpers when replacing my old 3300/03-03-06?
A: Ideally, mirror the old module’s jumper settings exactly: -VT (-18 V vs. -24 V), data interface (internal/external SDI/DDI), and comms type (RS232 vs. RS422). Take a clear photo of the old card’s jumpers before removal and replicate them on the replacement. Mismatched -VT jumpers between the 3300/03 and 3300/12 power supply are a common cause of strange Keyphasor and alarm behavior.
Q: Why is this cheaper than buying new from Bently Nevada?
A: The 3300 platform is obsolete; Bently Nevada no longer sells these as standard new items. What’s available is surplus or refurbished stock from decommissioned systems. These units are tested on a live 3300 rack with a known-good 3300/12 power supply and verified for basic power-up, LED status, and comms presence before shipping.
Q: What warranty do you offer on the 3300/03-03-06?
A: Standard warranty is 1 year from shipment against functional failure under normal industrial use. If the module fails within that period and shows no signs of misuse (overvoltage, water damage, burned components), we replace it or refund, your choice.
Q: How do you test these before shipping?
A: Each 3300/03-03-06 is installed in a genuine 3300 rack with a 3300/12 power supply. We verify: 24 VDC power-up, SUPPLIES OK LED, basic OK relay operation, and presence of DDI/SDI communications at the RS422/RS232 ports. A simple pass/fail test note and photos are available on request.
