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BENTLY 125720-01 is a 4-channel relay output module in the Bently Nevada 3500 series mechanical protection system, fully belonging to the 3500/32 series. This module is the "execution end" of the 3500 monitoring system, responsible for converting the alarm signals emitted by the monitoring modules (such as vibration, temperature, and speed monitors) into actual relay outputs, thereby driving external devices such as alarm indicator lights, sound and light alarms, trip valves, or shutdown relays. In the protection system of key rotating equipment such as steam turbines, compressors, and generators, this relay module is a key link to ensure that alarm signals can reliably perform protective actions.

BENTLY 125720-01 provides 4 independent relay output channels, each of which adopts Form C (SPDT) contact form and supports two configurations: normally open (NO) and normally closed (NC), which can flexibly adapt to different control logic requirements.

The core value of this module lies in its programmability and high reliability. Each output channel can be independently programmed through software, supporting AND and OR logic combinations, and can set complex output logic according to different alarm conditions. When the monitoring system detects situations such as vibration exceeding the limit, high temperature, or abnormal speed, the module will trigger corresponding relay actions according to preset logic to achieve interlocking control and protection shutdown of external equipment.

The module adopts electromechanical relay technology, with a contact load capacity of 2A @ 24VAC or 1A @ 24VDC, and an electrical isolation voltage of up to 1500 VAC, ensuring signal integrity and anti-interference ability in harsh industrial environments.

BENTLY 125720-01 supports redundant configuration and can be paired with the main relay module as a backup module. When the main module fails, the backup module will automatically and seamlessly take over, ensuring that critical alarm and protection functions continue to operate without protection failure caused by a single module failure.

The contact life of this module is up to 100000 times (under 5A, 24Vdc conditions), and with a wide temperature design (operating temperature -30 ° C to+65 ° C, storage temperature -40 ° C to+85 ° C), it can easily cope with the challenges of harsh industrial environments such as power plants, chemical plants, and offshore platforms.

BENTLY 125720-01 four channel relay output module is widely used in industrial fields that require the highest level of mechanical protection:

Power industry: Vibration/overspeed alarm output for steam turbines, gas turbines, and generators, driving trip circuits or alarm indications

Oil and gas: Interlocking protection for compressor units and pump groups, triggering emergency shutdown or valve control

Chemical and Process Industries: Temperature/Pressure Alarm Output for Key Equipment such as Reactors and Agitators

Metallurgical industry: protection interlocking for heavy equipment such as rolling mill main motors and fans

Security system: Fire alarm, safety door control and other safety interlock applications

Product model 125720-01

Manufacturer Bently Nevada (Baker Hughes)

Belonging to series 3500/32

Product type: 4-channel relay output module

Number of channels: 4 independent channels

Contact form Form C (SPDT), normally open/normally closed configurable

Contact rated 2A @ 24VAC/1A @ 24VDC

Contact life 100000 times @ 5A/24Vdc

Electrical isolation 1500 VAC

Working temperature -30 ° C to+65 ° C

Storage temperature -40 ° C to+85 ° C

Humidity range 95% non condensing

Dimensions (height x width x depth) 241 mm x 24.4 mm x 99.1 mm

Weight approximately 0.4 kg

Installation position: 3500 rack full height slot

Redundancy support (automatic switching between primary and backup)

Communication protocols Modbus, RS-232/485, Ethernet

Pressure controllers can be used for neutral or corrosive gas and liquid media. The set value range is adjustable, with an adjustment range of 0.02~42Mpa. The switching difference is not adjustable. The pressure controller includes a wide range and many varieties, including differential pressure controller, explosion-proof pressure switch, explosion-proof differential pressure switch, pressure transmitter, differential pressure transmitter, wind pressure switch, and wind pressure transmitter.

The function of a pressure controller is to detect, display, alarm, and control signal output to ensure the normal operation of the system. It collects and processes data through a high-speed MCU and has built-in precision sensors for compensation. It is a high-precision device that detects pressure and liquid level signals, achieves pressure and liquid level monitoring and control. Widely used in automation systems for measuring gas and liquid pressure in chemical, mechanical, hydrological, electrical, environmental, and other fields. Due to its convenient and flexible adjustment, as well as simple installation, it can replace most situations where liquid level switches are used.

With the continuous development of technology, pressure controllers, as an emerging technological force, have occupied the pressure control market and become a strategic requirement for the development of China's industry. They are not only suitable for industrial petroleum and coal mines, but also begin to appear in modern household appliances. It can be seen that pressure controllers are becoming increasingly important.

Pressure controller is mainly a type of pressure control product, which plays a role in timely controlling pressure and controlling the start and stop status of equipment in industry, agriculture, and modern life. Take the familiar boiler as an example. A boiler is a relatively dangerous energy equipment. Once its pressure is not controlled, the accident rate is very high. The pressure controller plays an irreplaceable role inside. When the boiler pressure reaches the rated value, the pressure controller will control the boiler to stop working in a timely manner. When the pressure returns to the safe pressure value, the boiler will restart working.

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