RS-232 DB9 Converter Adapter Cable Shielded Industrial Control Equipment
Tinned Copper DB9 Serial Cable
Product introduction
D-type data interface connector, used to connect electronic
equipment (such as: computer and peripherals) interface standard.
Because the shape is similar to the English letter D, it is named
D-type interface.
Parameters:
| Place of Origin | Jiangsu,China |
| Brand Name | SYH |
| Model Number | SYH-P010 |
| Jacket | PVC |
| Connectors | RS-232 DB9 or Customized |
| Wire | OD4.5mm-7.0mm or Customized |
| Wire length | 260m or According to the customers' requirements |
| Wire Color | black or Customized |
| Certification | ISO9001, T/S16949, Rohs |
| MOQ | Small quantity can be accepted |
| Sample | Sample can be provided for evaluating |
| Sevice | OED ODM accepted |
| Delivery Time | 3-15 days upon receipt of payment |
| Packaging | 100/200/300/500pcs per bag , then outside carton |
| Test | Professional breakover and pulling force test before goods sent out |
DB9 connector
According to the number of interfaces, it is subdivided into A type
(15 pins), B type (25 pins), C type (37 pins), D type (50 pins), E
type (9 pins). Therefore, the common computer parallel port is the
DB25 pin connector. The serial port should be a DE9 pin connector.
The RS-232 (DB9) interface conforms to the serial data
communication interface standard established by the American
Electronics Industry Association (EIA). The original full name is
EIA-RS-232 (referred to as 232, RS232). It is widely used for
computer serial interface peripheral connection. Connect cables and
mechanical, electrical characteristics, signal functions and
transmission processes.
Features
RS-232 is one of the mainstream serial communication interfaces.
Because the RS232 interface standard appeared earlier, it is
inevitable that there are deficiencies, mainly including the
following four points:
(1) The signal level value of the interface is high, which is easy
to damage the chip of the interface circuit. The voltage of any
signal line of the RS232 interface is a negative logic
relationship. That is: logic "1" is -3- -15V; logic "0": +3- +15V,
noise tolerance is 2V. That is, the receiver is required to
recognize signals above +3V as logic "0", signals below -3V as
logic "1", TTL level of 5V is logic positive, and 0 is logic
negative. It is not compatible with TTL level, so you need to use
level conversion circuit to connect with TTL circuit.
(2) The transmission rate is low. In asynchronous transmission, the
bit rate is 20Kbps; therefore, in the 51CPLD development board, the
integrated program baud rate can only be 19200, which is the
reason.
(3) The interface uses a signal line and a signal return line to
form a common ground transmission form, and this common ground
transmission is prone to common mode interference, so the
anti-noise interference is weak.
(4) The transmission distance is limited. The standard value of the
maximum transmission distance is 50 feet. In fact, it can only be
used at about 15 meters.
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