What is a crossover serial cable?
A null modem serial cable (frequently called a crossover cable) is used to connect two DTE devices together without the use of a DCE device in between. For this to happen, the Transmit (TXD) and Receive (RXD) pins on one of the serial connectors are flipped.
How many wires are in a serial cable?
The RS-232 Standard Although RS-232 does not specify connector configurations, two have become de facto standards: DB25 (a 25-pin connector, in which usually no more than 10 wires are used), and DB-9 (a 9-pin connector, in which usually all 9 wires are used).
How many types of serial cable are there?
The RS-232 specification defines two types of serial devices, DTE and DCE. DTE normally refers to the serial port on a PC or terminal, while DCE refers to a modem or other type of communications device.
How do you wire a RS232?
In order for two RS-232 devices to communicate, you must connect the TX from one instrument to the RX of the second instrument, and vice versa. The Ground pins must be connected together. Keep in mind that a 25 pin RS-232 port on a PC trasmits on pin 2 and receives on pin 3, and Ground is pin 7.
What kind of wire is cross linked polyethylene?
Cross-Linked Polyethylene (XLPE). 125ºC. 60V. Stranded Tinned Copper with Tinned Overcoat (TOC) or Stranded Bare Copper with Tinned Overcoat (TPC) – Irradiated Cross-linked Polyethylene Tinned Copper.
When to use a straight through serial cable?
A straight-through or “one to one” cable is used to connect a DTE device (PC) to a DCE device (modem or other communications device). The transmit and receive lines are not cross-connected in this case, hence the name.
Are there different genders of RS232 connectors?
Additionally, as Nick Alexeyev has commented, a null-modem cable usually has connectors of the same gender, since standard RS232 distinguishes between a Data Terminal Equipment (DTE) box and a Data Circuit-Terminating Equipment (DCE) box, and these are distinguished be different connector genders.
What are the different types of XLPE cable?
In order to understand the different types of cross-linked polyethylene cable, otherwise known as XLPE cable, let’s first get to know what XLPE exactly is. It’s a hydronic tubing that derives from polyethylene plastic. A three-dimensional (3D) molecular bond within the plastic helps define XLPE cable.