Product Overview

The Bently Nevada 3500/33-01-00 149992-01 is a 16-channel relay module. This module provides relay outputs for the 3500 series monitoring system. It occupies one full-height front slot in the 3500 rack. The 3500/33-01-00 converts alarm conditions into dry contact outputs. You can use these outputs to trigger external devices. This module is made in the U.S.A. It requires 3500 Rack Config version 3.3 or later.

Technical Specifications

The 3500/33-01-00 149992-01 has a main module measuring 241 mm x 24.4 mm x 242 mm. Its weight is 0.70 kg. Power consumption is 5.8 watts typical. Operating temperature ranges from -30°C to +65°C. Storage temperature goes from -40°C to +85°C. Humidity tolerance is 95% non-condensing.

The 3500/33-01-00 provides 16 independent relay channels. Each relay is single-pole double-throw (SPDT) type. All relays have epoxy sealing for environmental protection. Arc suppressors rated at 250 Vrms come installed as standard. Relay contact life is 10,000 cycles at rated load.

Front Panel Indicators

The 3500/33-01-00 149992-01 has several LED indicators:

• OK LED: Illuminates when the 3500/33-01-00 is operating properly

• TX/RX LED: Flashes during communication with other 3500 rack modules

• CH Alarm LED: Illuminates when a relay channel is in alarm state

Relay Contact Ratings

The 3500/33-01-00 149992-01 supports different contact ratings based on your system type.

Standard Systems (Resistive Load – DC):

• Min switched current: 100 mA at 5 Vdc

• Max switched current: 5 A

• Max switched power: 70 W at 24 Vdc, 10 W at 48 Vdc, 9 W at 60 Vdc

• Max switched voltage: 125 Vdc

Standard Systems (Resistive Load – AC):

• Max switched current: 5 A

• Max switched power: 1200 VA

• Max switched voltage: 250 Vac

Failsafe and Hazardous Area Systems:

• Max switched voltage: 30 Vdc

• Max switched current: 5 A

• Min switched current: 100 mA at 5 Vdc

Low Current Relay Applications (Gold-plated contacts):

• Min switched current: 1 mA at 1 Vdc

• Max switched current: 100 mA at 48 Vdc

• Max current before damaging gold relays: 5 mA

Relay Operation Settings

The 3500/33-01-00 has four groups of four channels. Each group is switch selectable for operation mode. You can choose Normally De-energized (ND) or Normally Energized (NE). This flexibility allows you to match your plant’s safety requirements.

Installation Guidelines

Power down the 3500 rack before installing the 3500/33-01-00 149992-01. Insert the module into a full-height front slot. Secure it firmly to the rack backplane. Wire each relay output to your external devices. Select ND or NE operation using the dip switches. Configure alarm mapping using 3500 software. Test each relay channel before putting the system online. Verify all alarm outputs function correctly.

Packaging List

• One 3500/33-01-00 149992-01 main module

• One terminal block for relay wiring

• Four channel label strips

• Quick start configuration guide

• Anti-static protective bag

Software Requirements

The 3500/33-01-00 149992-01 requires specific software versions:

• 3500 Rack Configuration: Version 3.3 or later

• 3500 Data Acquisition Software: Version 2.40 or later

• 3500 Data Display Software: Version 1.40 or later

Important Ordering Considerations

The 3500/33-01-00 has several limitations to note. When ordered with multiple approvals option (-02), voltage is restricted. The module does not meet Zone 2 spacing requirements at higher voltages. Using higher voltages violates hazardous area certificates. For CSA-only approvals option (-01), voltage is de-rated to 30 Vrms. If the 3500/33-01-00 149992-01 is part of a SIL system, higher voltages are not allowed.

Frequently Asked Questions (FAQ)

1. How many relay channels does the 3500/33-01-00 provide?
The 3500/33-01-00 149992-01 provides 16 independent SPDT relay channels. They are organized as four groups of four channels.

2. Can I change relay operation from de-energized to energized?
Yes, each group of four channels is switch selectable. You can choose Normally De-energized or Normally Energized operation.

3. What is the minimum switched current for standard relays?
For standard silver contacts, the minimum is 100 mA at 5 Vdc. For low current gold-plated contacts, the minimum is 1 mA at 1 Vdc.

4. What software do I need for the 3500/33-01-00?
You need 3500 Rack Config version 3.3 or later. You also need Data Acquisition software version 2.40 or later.

5. Can I use this module in a functional safety system?
Yes, but with voltage restrictions. The functional safety certificate requires restricted voltage. Higher voltages are not allowed for SIL systems.