Bently Nevada 3500/33 149986-01 16-Channel Relay Module

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Product Description

The Bently Nevada 3500/33 16-Channel Relay Module (149986-01) is a half-height relay output module for the 3500 Machinery Protection System rack, offering the highest relay density in the 3500 series — 16 independent relay outputs in a compact design. It is the ideal solution for racks where many alarm signals need to drive multiple output actions without consuming excessive rack space.

Each of the 16 relay outputs can be independently programmed using AND/OR alarm logic, allowing signals from any monitor module in the rack (such as the 3500/42M, 3500/45, or 3500/53) to be combined into flexible alarm and trip strategies. Relay action, time delays, and invert/non-invert behavior are all configurable via the 3500 Rack Configuration Software — no hardware changes required.

A dedicated Rack Relay OK feature continuously monitors the health of each relay channel, alerting operators if a relay or its drive circuitry fails. The half-height form factor also allows two 3500/33 modules to be combined with a 3500/34 TMR relay module within a compact rack footprint, giving system designers maximum flexibility.

The 3500/33 is widely used in power plants, LNG facilities, refineries, and offshore platforms where numerous alarm outputs are required for DCS annunciation, pump/fan shutdown logic, and auxiliary equipment control.

Key Features

• 16 independent relay outputs — highest relay density of any 3500 series relay module
• Half-height design — compact form factor optimizes rack slot usage; two modules fit where one full-size relay module would
• Flexible AND/OR logic — each relay programmable with up to two AND-ed inputs combined with OR-ed groups via software
• Programmable relay behavior — invert/non-invert (energized/de-energized-to-alarm), time delays, and latching options per relay
• Rack Relay OK monitoring — continuous health supervision of relay channels and drive circuitry
• Front panel LED status — OK, Alert, Danger, and Config Fault indicators plus per-relay status feedback
• Hot-swappable design — module replacement without powering down the 3500 rack
• Software configuration — fully configurable via 3500 Rack Configuration Software

Technical Specifications

⚠️ *Specifications may vary depending on firmware version and I/O option. Contact our team to confirm the correct module and I/O combination for your rack configuration.*

Applications

• Alarm annunciation to DCS/SCADA systems in power generation plants
• Auxiliary equipment control (pumps, fans, lube oil systems) in refineries and LNG facilities
• Compressor and turbine permissive and shutdown logic
• High-density alarm output requirements in compact 3500 rack designs
• Machinery protection system upgrades and rack expansions

Why Buy From Us?

• ✅ In stock — large inventory of 3500 series modules for same-day dispatch
• ✅ 12-month warranty on every module
• ✅ Tested & verified — each unit inspected before shipment
• ✅ Global shipping — DHL / FedEx / UPS express delivery
• ✅ Technical support — experienced engineers available for configuration and troubleshooting
• ✅ Competitive pricing — contact us for volume discounts and project packages

Frequently Asked Questions (FAQ)

Q1: What is the difference between the 3500/33 and 3500/32 relay modules?
A: The 3500/32 provides 4 relay outputs in a full-size module, while the 3500/33 provides 16 relay outputs in a half-height design. The 3500/33 is the choice when high relay density or compact rack layouts are required; both offer programmable AND/OR alarm logic.

Q2: How many relays does the 3500/33 have?
A: It provides 16 independent relay outputs, each individually programmable via the 3500 Rack Configuration Software.

Q3: Can the 3500/33 be used together with the 3500/34 TMR relay module?
A: Yes. The half-height design allows a 3500/33 and a 3500/34 to be combined in the rack, letting you mix standard alarm relays with triple modular redundant voting relays in one system.

Q4: What does the Rack Relay OK feature do?
A: It continuously monitors the health of each relay channel and its drive circuitry. If a relay or drive fails, the system alerts operators — helping ensure your protection logic remains fully functional.

Q5: What is the lead time and warranty?
A: In-stock items typically ship within 24–48 hours. All modules come with a 12-month warranty.

3500/33 149986-01

BENTLY BRAND

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Supplies industrial spare parts covering well‑known international brands: ABB, GE, Bently Nevada, Emerson, Honeywell, Schneider, EPRO, Yokogawa, Woodward, Foxboro and Invensys TRICONEX.

We maintain ample stock, offer fast lead times and deliver products with stable, reliable quality.

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