Bently Nevada 135489-01 4-Channel I/O Module with Internal Barriers

Product Description

The 135489-01 is a Bently Nevada 3500 series I/O module with internal intrinsically safe barriers and internal termination, compatible with 3500/42, 3500/70 and 3500/72 monitors. It supports 4 channels for proximity probe or accelerometer signals, used for shaft vibration, casing vibration and dynamic parameter acquisition. The built-in barrier design allows sensors installed in hazardous areas without external safety barriers, simplifying field wiring while maintaining ATEX/IECEx intrinsic safety certification. It plugs into the 3500 rack and communicates with the 3500 system backplane for machinery protection and condition monitoring.

Features

• 4-channel input, support proximity probes and accelerometer (Velomitor) sensors
• Integrated internal intrinsically safe barriers, suitable for hazardous zone applications
• Internal termination design, no separate terminal block required
• Channel isolation, open circuit and short circuit diagnostic function
• Front panel LED indicators for module status and channel fault
• Operating temperature: -30°C ~ +65°C, humidity up to 95% non-condensing
• Compatible with 3500/42, 3500/70, 3500/72 monitor cards
• Supports 4–20mA recorder output for trend recording
• USA origin, single slot 3500 rack form factor

Applications

• Oil & gas, offshore platform rotating machinery vibration monitoring
• Refinery, chemical plant turbine, compressor protection system
• Power plant steam/gas turbine, generator vibration monitoring
• Hazardous area sensor signal acquisition for 3500 machinery protection system
• 3500 rack retrofit, spare replacement for vibration monitoring loops

FAQ

Q: What is the difference between 135489-01 and standard non-barrier I/O modules?
A: 135489-01 has internal intrinsic safety barriers, can connect sensors directly in explosive areas; standard versions need external barriers.

Q: Which monitor cards work with 135489-01?
A: Mainly matched with 3500/42, 3500/70, 3500/72 monitors.

Q: Is this module discontinued?
A: It is legacy 3500 spare part, original production stopped, supplied as surplus and refurbished tested stock.

Q: Can it mix proximity and accelerometer signals on the same module?
A: It depends on the paired monitor card configuration, channel type is set in 3500 configuration software.