May I ask, what is the difference between the Bentley 3500 frame with 40 cards and one with 50 cards?
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As the title suggests, I’d like to ask the experts: what’s the difference between the Bentley 3500 frames with 40 cards and those with 50 cards? Aren’t they all used for speed measurement? Thank you for the reply
Could someone with more experience give me some advice? Thank you
The 40-series and 50-series cards in the Bentley 3500 system differ mainly in terms of functionality. They all have the capability to measure speed, but they differ in terms of specific functions and applications. 40 cards: mainly include the 3300 XL 11 mm preamplifier, interface modules, direct measurement modules, and speed I/O modules. 50 cards: mainly include the 3500/22M horizontal communication module, 3500/25 keyboard display module, and 3500/32 4-channel relay module. Therefore, although they can all be used for measuring speed, different cards are used in various locations of the system when different functions are required. If you need to know the specific functions of each module, it is recommended to consult the relevant manuals for the Bentley 3500 system or seek advice from professionals. .
40: Measure vibration, displacement... 50: Measure rotational speed
Thank you for the reply. What about 50 and 42?
This post was last edited by zhoudingshengs on 2023-11-6 at 10:26. You’ll understand once you read the introduction to the Bentley 3500 system in the attachment. 1. The 3500/40M Pro*mitor is a 4-channel displacement monitor that receives inputs from Bentley Nevada displacement sensors, processes these signals to generate various vibration and displacement measurements, and compares the processed signals with user-programmable alarm setpoints. The 3500 configuration software can be used to configure each channel of the 3500/40M, endowing them with the following functions: (1) radial vibration, (2) axial displacement, (3) differential expansion, (4) shaft eccentricity, (5) vibration of REBAM rolling bearings. Note: These monitor channels are configured in pairs, and a maximum of 2 of the aforementioned functions can be implemented at any given time. Channel 1 and Channel 2 perform one function, while Channel 3 and Channel 4 perform another function or the same function. The main functions of the 3500/40M monitor are: 1) To protect the machine by continuously comparing the current value of machine vibration with the set alarm values, and thereby activating the alarm system ； 2) Provide vibration information on critical equipment for operators and maintenance personnel. Through configuration, each channel typically processes the input signal into a “static value”. Each static value has a pre-configured warning threshold, and a critical alarm threshold can be configured for every two static values. The delay time for triggering an alarm can be set via software. Front panel LEDs: OK LED: Indicates that the 3500/40M is operating normally. TX/RX LED: Indicates that the 3500/40M is communicating with other modules within the 3500 framework. Bypass LED: Indicates that the 3500/40M is in bypass mode. Sensor buffer output: There is a coaxial connector for each channel on the front panel, and each coaxial connector is equipped with short-circuit protection. 2. The 3500/50 speed sensor module is a two-channel module; it can receive signals from eddy current sensors or magnetic sensors (unless otherwise specified), and it can determine the shaft’s speed, the rotor’s acceleration, or the rotor’s direction. It compares these measurements with user-programmable alarm points and issues an alarm when those points are exceeded. The 3500/50 tachometer module can be programmed using the 3500 frame status software, and it can be configured in four different ways: 1. Speed monitoring, setpoint alarm, and speed range alarm; 2. Speed monitoring, setpoint alarm, and zero-speed indication; 3. Speed monitoring, setpoint alarm, and rotor acceleration alarm; 4. Speed monitoring, setpoint alarm, and reverse rotation indication. The 3500/50 can also be configured to provide key phase signals to the 3500 frame backplane for use by other monitors, thereby eliminating the need to install a key phase module within the frame. The 3500/50 also has a peak hold function ； It can store the highest speed the machine has ever reached, the highest reverse speed, or the number of reversals (depending on the selected channel type). These peaks can be reset by the user.
50 cards are used to measure the rotational speed, which is then sent to CCS via 485 communication. 40 cards are mainly used to measure vibration and displacement. The interlock values are output to the CCS via relay cards; note that the interlock logic is processed in the CCS, with the interlock signals distributed across different relay cards.