GE IC695PSD140E 24V DC power supply voltage

Description

Power Supply IC695PSD140E is a multi-purpose 40-Watt supply that operates from an input voltage source in the range of 18 VDC to 30 VDC. This power supply provides three outputs:

▪ +5.1 VDC output

▪ +24 VDC relay output that can be used to power circuits on Output Relay modules

▪ +3.3 VDC. This output is used internally by RX3i modules with IC695 catalog numbers

Multipurpose Power Supply IC695PSD140E is suitable for use in loadsharing and redundancy application. It must be installed in a PACSystems RX3i (IC695 catalog number) Universal Backplane. It can be used as the only power supply in the backplane, or combined with up to three additional Multipurpose Power Supplies.

IC695PSD140E Four LEDs on the Power Supply indicate:

▪ Power (Green/Amber). When this LED is green, it indicates power is being supplied to the backplane. When this LED is amber, power is applied to the Power Supply but the Power Supply switch is off.

▪ P/S Fault (Red). When this LED is lit, it indicates the Power Supply has failed and is no longer supplying sufficient voltage to the backplane. ▪ Over Temperature (Amber). When this LED is lit, it indicates the Power Supply is near or exceeding its maximum operating temperature.

▪ Overload (Amber). When this LED is lit, it indicates the Power Supply is near or exceeding its maximum output capability on at least one of its outputs.

If the red P/S FAULT LED is lit, the Power Supply has failed and is no longer supplying sufficient voltage to the backplane . The amber OVERTEMP and OVERLOAD LEDs light to warn of high temperature or high load conditions. The CPU Fault Table shows a fault if any Overtemperature, Overload, or P/S Fault occurs.

On the one hand, the system encapsulates the Modbus protocol and network implementation, achieving functional reuse, reducing repetitive manipulation, and making network debugging more convenient; On the other hand, the star structure makes it convenient to add data and sites. In principle, each site can access data from any site without the need for new connections. Under the network structure shown in Figure 4, it is convenient to connect the blending warehouse and the batching scale to achieve half warehouse blending (controlling the batching scale formula based on slurry quality feedback), and increasing the control loop to 3. Some real-time data can also be stored in historical databases for long-term storage and post analysis queries.

Other characteristics of Modbus protocol
In addition to the widely used features mentioned in the introduction, Modbus also has other features. The Modbus protocol requires data verification. In addition to parity verification in the serial protocol, the ASCII mode uses LRC verification, and the RTU mode uses 16 bit CRC verification. However, the TCP mode does not specify additional verification, as the TCP protocol is a reliable connection oriented protocol. In addition, Modbus adopts a master-slave mode to send and receive data at regular intervals. In practical use, if a slave site is disconnected (such as a fault or shutdown), the Master terminal can diagnose it, and when the fault is fixed, the network can automatically connect. Therefore, the Modbus protocol has good reliability.

Modbus defines many functions and considers practical applications in the industry comprehensively. And the protocol is still in development, and users can also customize function codes. It can be seen that Modbus has good scalability.
For some repeatedly sent detection data, the Unsolicited method can be used, which means that the Master end does not need to send a request and the Slave end actively sends the data. This can reduce network data traffic and improve transmission speed. Therefore, the application of Modbus protocol is also relatively flexible.

Comparison with NetDDE protocol
The NetDDE protocol has several drawbacks: firstly, the technology is too old, and there is no 32-bit API on the Win98 platform, only 16 bits, making it difficult to implement on the 32-bit platform