Key Technical Specifications
- Product Model: 3500/94M 120M8155-01
- Manufacturer: Bently Nevada
- Display Type: VGA Touchscreen (Advantech Industrial Grade)
- Screen Size: 10-inch or 15-inch (Verify specific part suffix)
- Custom Screens: Up to 9 configurable via Rack Configuration Software
- Default Views: 1X Filtered Vibration Bar Chart, Proximitor Gap
- Status Indicators: Continuous Alarm/OK status in top-right corner
- Rack Selection: Front panel button with color-coded status
- Remote Extension: Supports KVM extender up to 6.2 miles (10 km)
- Multi-Rack View: Display Router Box supports up to 4 racks per screen
- Power Supply: Requires separate 24 VDC power (not backplane powered)
- Certifications: Hazardous Area Certified (10″ model)
Product Introduction
The Bently 3500/94M 120M8155-01 is a dedicated VGA display module for the 3500 Machinery Protection System, providing local, real-time visualization of machine health without requiring a PC. It mounts directly to the 3500 rack or connects remotely via KVM, showing system events, alarm lists, and channel data on a rugged industrial touchscreen.This module solves the “black box” problem of rack-mounted protection systems by giving operators immediate visual feedback. With 3500/94M, you get up to 9 custom screens (e.g., trend plots, gap voltages) and a persistent alarm banner that changes color if any connected rack goes into alarm — even when viewing a different machine.
Installation & Configuration Guide
Preparation (10 min)
- Confirm 120M8155-01 matches your required screen size (10″ vs 15″).
- Verify 24 VDC power supply is available (this module does not draw power from the 3500 backplane).
- Have the 3500 Rack Configuration Software ready for custom screen setup.
Removal (5–10 min)
- Disconnect VGA, USB (touch), and power cables.
- Remove the 4 mounting screws from the rack front or panel.
- Label all cables before disconnection. (VGA and touch USB look similar; swapping them causes “no touch” issues.)
Installation (10 min)
- Mount the 3500/94M using the provided brackets; ensure ventilation clearance.
- Connect VGA to the 3500/94M card, USB to the touch controller, and 24 VDC to the power terminal.
- If using a Display Router Box, connect the router output to the VGA input.
Power-On & Test (10 min)
- Apply 24 VDC; the screen should show the Bently Nevada splash screen within 10 seconds.
- Verify touch response by tapping the “Rack Select” button.
- Check the top-right status indicator: Green = OK, Red/Yellow = Alarm/Not OK.
Troubleshooting Quick Reference
| Symptom | Probable Cause | Action |
|---|---|---|
| No Display | No 24 VDC or loose VGA cable | Measure power at terminal; reseat VGA connector |
| Display OK, No Touch | USB cable swapped or driver issue | Verify USB connects to touch controller, not VGA card |
| Flickering Screen | EMI or bad VGA cable | Use shielded VGA cable; route away from VFDs |
| Wrong Rack Data | Display Router misconfigured | Check Router DIP switches; verify rack address |
| Touch Drift | Screen calibration lost | Run calibration utility via Configuration Software |
Dimensions, Mounting & Wiring Notes
- Dimensions: 10″ Model: ~270×220×50 mm | 15″ Model: ~360×290×50 mm (Verify with drawing)
- Mounting: Front-panel mount or 3500 rack bracket
- Terminal Notes: 24 VDC on separate terminal block; VGA/USB via rear connectors
- Wiring Note: Keep VGA cable < 15m without extender; use KVM for longer runs
FAQ
Does this module need a PC to work?
No. The 3500/94M is a standalone display. It reads data directly from the 3500 backplane. A PC is only needed if you want to configure the 9 custom screens.Can I view multiple racks on one screen?
Yes, but you need the optional Display Router Box. One router supports up to 4 racks, and you cycle through them using the front panel button.Is the 10″ screen hazardous area rated?
Yes, the 10″ Advantech model is certified for hazardous locations. The 15″ model is typically for safe areas only. Always check the specific part number suffix.I replaced the module and touch doesn’t work. Why?
90% chance the USB touch cable is plugged into the wrong port. The VGA card and touch controller have separate USB connectors. Swap them and test. (I’ve seen this mistake more times than I can count.)How do I change the custom screens?
Use the 3500 Rack Configuration Software. Connect via the serial port or network, edit the display layout, and download to the module. No PC is needed for viewing, only for editing.What’s the max distance from the rack?
With a standard VGA cable: ~15m. With a supported KVM extender: up to 6.2 miles (10 km). Beyond that, use System 1 software on a remote PC.Do you test the touchscreen?
Yes. Every 3500/94M is tested for touch accuracy across all 4 corners and center, plus VGA signal integrity. Test report included.
