What is a Coaxial Splitter?

For coaxial control, there is always a certain distance between the monitoring site and the control center. The image signal needs to be transmitted from the monitoring site to the control center. At the same time, the control signal from the control center must be transmitted to the site. section. Coaxial control also includes synchronous control of two coaxially connected motors.

Control signal transmission For CCTV, common control methods include direct control, coded control, and coaxial video control. Direct control is rarely used because of too many cables. Encoding control is to digitize (modulate) all control commands before transmitting them to the control device and then demodulate them to restore the direct control amount, which can save cables. This method has a long transmission distance and is often used in engineering. Coaxial video control means that the control signal and the video signal share a coaxial cable, and the control signal is transmitted by frequency division or video signal blanking period, but it is more expensive. ^[1]

AD3016 coaxial controller

Coaxial controller

Coaxial control

AD3016 coaxial controller is a high-performance, multi-functional, and expandable coaxial controller. It has a built-in high-performance CPU module and Ethernet interface to complete the control data of a single distributor address to each internal coaxial video control module. Conversion. A single distributor can have a total of 4 coaxial video control modules, and each module can connect 4 front-end devices, that is, a single coaxial controller allocates a total of 16 front-end device addresses. The system allows a total of 16 coaxial controllers to work online, that is, it can support a total of 16 * 16 = 256 front-end devices. ^[3]

Main features

16-channel coaxial video control port (BNC), support code receiving and code sending control input ports: RS232, RS485 / RS422, MANCHESTER / BI-PHASE and Ethernet interface through dial setting, support multiple protocol inputs, such as: PELCO -D, PELCO-P, MOLYNX, VICON, DIAMOND, KALATEL, HUNDA, VCL, PHILIPS, AMERICANDYNAMICS, PANASONIC, SAE, and manufacturer's protocol. When receiving RS485 / RS422 and RS232 control signals, it supports 4800BPS, 9600BPS, 19200BPS, and 38400BPS. A baud rate communication port with 120 impedance jumper and video lightning protection standard of 400W. ^[3]

Multi-motor coaxial drive

The control idea of multi-motor coaxial drive is based on the Modbus communication protocol and PLC, which realizes the synchronous control of two coaxially connected motors and directly drives one mud pump to work, which is more energy-saving, safe and stable than before. Taking the dual-motor coaxial mud pump electrical control system as an example, the superiority of the dual-motor coaxial drive is analyzed. According to the characteristics of the Modbus-RTU communication protocol, Siemens S7-226PLC and Vacon NXP frequency converter are used for synchronous communication. Prove the synchronization and energy saving of the multi-motor coaxial drive system. ^[3]