Overview
Manuals
Principle
Primary Applications
Features:
- Spare 4-Channel Relay Output Module
- 3500/32M 4-Channel Relay Module
- The 4-Channel Relay Module is a full-height module that provides four relay outputs
The four-channel relay module is a full-height module providing four relay outputs. Any number of four-channel relay modules can be installed in any slot on the right side of the transient data interface module. Each output of the four-channel relay module is independently programmable to execute voting logic.
Each relay on the four-channel relay module contains alarm-driven logic. The alarm-driven logic is programmed using AND and OR logic and can use alarm inputs (alarm and danger states), abnormal states, or a single PPL from any monitoring channel or any combination of monitoring channels in the rack.
The 125720-01 Bently Nevada Spare 4-Channel Relay Output Module may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 125720-01 Spare 4-Channel Relay Output Module Manuals(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
The Bently Nevada 3500/32M four-channel relay module operates based on a digital logic drive mechanism. It receives alarm status signals in real time from other monitoring modules (such as displacement, vibration, speed, or temperature modules) via the backplane bus of the 3500 rack. The module's internal processor performs complex Boolean operations on these input signals according to the preset logic drive array (such as AND, OR, or 2oo3 voting logic) in the configuration software. Once the operation result meets the trigger condition, the module immediately drives its physical relay coil to actuate, outputting dry contact signals to the external control system (such as a PLC or DCS) through the closing or opening of the contacts, thereby achieving automatic shutdown or alarm protection of the mechanical equipment.
1. Automatic Machine Shutdown: The most critical application is providing a physical "trip" signal to the machine control circuitry. If a monitoring module (e.g., a 3500/42M vibration monitor) detects a "hazardous" condition, the 125720-01 will execute a shutdown command via its relay contacts.
2. Complex Alarm Logic (Voting): Each of the four channels can be independently programmed as voting logic (e.g., 1/1, 2/2, or 2/3). This is used in high-risk environments to ensure that a single sensor failure does not result in a "false trip".
3. External Device Control: Used to trigger alarms, beacons, or notify the DCS/PLC system of "alarm" or "abnormal" conditions within the 3500 rack.
4. Hazardous Area Protection: Designed for reliable operation under extreme conditions, typically with certifications for use in hazardous industrial environments.
