3500/32 (Bentley 4-channel relay module)

Model: 3500/32 (Common model: 3500/32-01-02, Spare part number: 184631-02)

Brand: Bently Nevada

Series: 3500 Mechanical Protection System (TSI)

Position: Full-height 4-channel relay output card, providing programmable alarm/danger relay contacts for the 3500 system, directly driving audible and visual alarms, shutdown circuits or connecting to DCS/PLC, is the core execution output component of the vibration protection system.

I. Basic Parameters

1. Electrical and Power Consumption

Power Supply: 3500 chassis backplane + 5 VDC

Power Consumption: 5.8 W (typical)

Relay Type: SPDT (Single-Pole Double-Throw), each channel includes COM/NO/NC

Contact Capacity: 5 A @ 24 VDC / 120 VAC; 1 A @ 240 VAC (resistive)

Action Time: < 10 ms

Arc Suppression: Built-in 250 Vrms arc extinguisher, extending contact lifespan

2. Environmental and Mechanical

Operating Temperature: -30 °C ~ +65 °C

Storage Temperature: -40 °C ~ +85 °C

Relative Humidity: 5%–95% (no condensation)

Size (Height × Width × Depth): 241.3 × 24.4 × 99.1 mm (full-height module)

Weight: Approximately 0.4 kg

Installation: Any full-height slot of 3500 chassis (slots 3–15)

3. Status Indicator Lights (Panel)

OK (Green): Module operating normally

RLY1–RLY4 (Yellow): Corresponding relay actions (on = attracted)

II. Core Functions

4 Independent Relay Outputs: Each channel can be independently programmed and mapped to the ** Alert / Danger / Not OK ** status of any monitoring card (3500/40M/42M/45M, etc.).

Programmable Logic (Core):

Support AND/OR voting logic (e.g., "Axis vibration high AND displacement high → trigger shutdown")

Each channel can be set to normal excitation / power failure excitation (the safety shutdown option selects "power failure excitation" first)

Support Self-Release (Latch): Maintains the state after triggering, can be manually / remotely reset

System-level Interconnection: Can combine logic across channels and modules to implement complex protection strategies (such as vibration + temperature + rotational speed three-parameter interlock).

Alarm Levels:

Alert (Warning): Drive alarm lights / buzzer

Danger (Danger): Drive shutdown circuit (electromagnet valve, circuit breaker)

Redundant Expansion: 4 channels per module, multiple modules can be paralleled to expand channels; critical systems can be equipped with 3500/34 triple redundant relay modules.

III. Model Code (3500/32-XX-XX) Table

Section Code Explanation

1 01 Relay output: Standard SPDT

2 02 Logical version: Supports advanced voting logic

IV. Installation and Wiring

1. Installation location

Full-height slot of 3500 rack (Slot 2 is 3500/22M, starting from Slot 3, 3500/32 can be installed)

A single rack can accommodate up to 8 pieces (32 relays)

2. Backplane wiring (terminal block)

RLY1–RLY4: Each channel COM/NO/NC

COM: Common terminal

NO: Normally open (conducts when the relay is attracted)

NC: Normally closed (conducts when the relay releases)

Wiring suggestions:

Strong current circuits (>24 VAC) connected with a 3 A fuse

Shielded wire single-ended grounding, away from strong interference from the inverter/motor

V. Configuration Steps (Quick)

Hardware installation: Power off, insert into full-height slot, power on, OK light should be constantly on.

Software configuration:

Open 3500 System Configuration Software, connect the rack.

Enter 3500/32 configuration page, define the logic for each relay channel:

Mapping channel (such as 3500/42M CH1 vibration danger)

Logic type (AND/OR)

Excitation mode (Normal/Energized)

Self-retention (Latch)

Configuration download: Configure and download to the rack, it takes effect after automatic restart.

Function test: Simulate channel over-limit, corresponding RLY light should be on, measure the contact on-off.

VI. Common Faults and Maintenance

OK light off: Poor contact (unplug and clean the gold fingers), configuration error (re-download configuration), hardware damage (replace the module).

Relay does not operate: Logical mapping error, excitation mode set in reverse, contact burnout (replace the module).

Contact sticking: Overload, frequent operation → Check the load capacity, reduce the number of operations.

Regular maintenance: Check the indicator lights and wiring terminals every quarter; modules are maintenance-free, faults can be directly replaced with spare parts.