Marshall cv-usb-rs485
Overview of products
The marshall cv-usb-rs485 adapter is a usb to rs485/422 converter used mainly to connect usb equipment to rs485 communications network. The adapter applies to a variety of specialized communication and broadcasting applications, especially those that require data transmission between usb equipment and rs485 equipment. It connects to computers through the usb interface and converts the data to rs485 signals to communicate with equipment supporting rs485 protocols (such as surveillance cameras, video collectors, fingerprint machines, etc.)。
Ii. Skill parameters
Parameters specifications
Marshall cv-usb-rs485
Interface type usb to rs 485/422
Usb interface standard usb-a plug-in, unplugged connection
Communication output porter rate 300-115200 bps
Work power usb+5v power, 0. 5a self-rehabilitation fuse
Module size 53 mm long x 18 mm wide x 10 mm high
Working temperature -30°c to +85°c
Communication distance up to 1. 2 km
Indicator lamps pwr (power), txd (transmitting), rxd (receiving)
Gnd (local), a+ and b-
Windows 98, windows 2000, windows xp, windows 7, windows 8, windows 10, linux, etc
Iii. Performance characteristics
Plug-in: no additional driver is required to automatically identify and install as a com port。
Multi-point communications: support points to multi-point communications, applicable to multiple devices connected to the same communications bus。
Indicator lamps: pwr (power), txd (transmitting) and rxd (receiving) indicators on equipment to display the operational state of the equipment。
Protective function: use of tvs tubes and self-rehabilitation fuses to prevent reverse and overflow damage。
Compact design: small size, easy to install and use。
Iv. Product size
Length: 53mm
Width: 18mm
Height: 10 mm
V. Product applications
Surveillance systems: surveillance cameras, video collectors, etc。
Industrial automation: e. G., digital control machines, process exchange, plc, etc。
Radio and video: e. G. Marshall's high-resolution and high-speed cameras。
Vi. Optional features and accessories
Segregation version: depending on the application scenario, quarantine or non-segregated versions may be selected to enhance intervention resistance。
Extension line: provide rs485 communication lines of different lengths to meet different installation requirements。
Terminal resistance: provides optional terminal resistance to optimize the signal quality of long-range communications。
Vii. Selected guidance
Application scene: select whether isolated versions are needed based on actual application needs。
Porter rate: select the appropriate porter rate (usually 300-115,200 bps) based on communication distance and data transmission rate。
Type of interface: confirms whether the equipment requires rs485 or rs422。
Power requirements: the adaptor is powered through usb and does not need external power supply, subject to confirmation that the usb port capacity meets the demand。
Environmental adaptation: select the appropriate model according to the work temperature range to ensure that work can also be stabilized in extreme environments。