The diagram below shows a basic RS485 cable for use with the RJ11 socket on Unitronics PLCs. The symmetrical pin layout of the RJ11 sockets on the Unitronics PLCs allows an easy way of interconnecting the PLCs with both RS232 and RS485 communications. For RS232a crossover cable is used where pin 1 is connected with pin 6 at the other connector, pin 2 with pin 5, etc. This interconnects the transmit and receive signals of both PLCs, and also the handshaking signals DTR and DSR. Otherwise a full 6 wire cable must be used. Two wire telephone cables will not function because in that case the ground signal levels on both sides will be floating. In addition to its basic function as a camera test monitor, the CCTVmate has a number of built in test meters and is a professional troubleshooting kit for any CCTV engineer. The CCTVmate test monitor is supplied with a neck strap for secure one-handed control whilst being used up a ladder. Unique rapid auto data direction control reverses a half-duplex channel without software or hardware intervention.

Now you can stock just one adapter to fill all your legacy "RS" serial interfacing plus provide a low level TTL control interface. USB Serial - The ANC-6204 multi-interface USB adapter provides RS232, RS422/485 or TTL/CMOS in one converter. Depends what you mean by a serial cable - Fibre, Ethernet, RS232, RS485, RS422, USB, HDMI, SMPTE292 are all examples of serial communications media. We feature RS232, RS422, RS485, USB, and ethernet devices using copper and fiber. Category 5 (Cat 5, Cat 5e, and Cat 6) cables are the most common Ethernet cables in use today. Be sure to use a wire pair such as the blue and blue/white pair for the data lines and a third wire or pair twisted together for the common connection. The most common cable type is Cat 5e-UTP (unshielded twisted pair) which may work over shorter distances in less demanding applications with low EMI noise levels. ANC-6090 converts RS232 level signals to RS422 or RS485 differential signals for noise immune communication at 921 Kbaud at distances up to 4000 feet The adapter can also be used for RS232 to TTL/CMOS serial interfacing. Extended range. Reliable operation at distances far beyond the conventional RS485 limit. This provides a wide range of interface possibilities.

Extended range 3KV isolated high drive voltage(12-15V) devices using CAT-5/6 cable. Your feedback and comments drive us to improve the products and develop new ideas. Our products are at the South Pole, the bottom of the sea, the edge of space, and in between. Many of our products were developed in response to a customer’s specific need. If your system is unreliable, flakey, or blows up from time to time, you need to talk to us. The normal way to implement this is with a two wire system with differential signal levels. Technical assistance and system design help is available at no charge. RS485 is in its design a different interface from RS232. The RS232 DB-9M connector is compatible as a PC comport and the RS422/485 DB-9F follows the SMPTE pinout arrangement common to multimedia equipment. Our ANC-6185 adapter version offers either terminal block or RJ-45 connectors instead of the DB-9F of the ANC-6090. The adapter plugs into the serial port of the PC and is powered from the port for most applications. The adapter includes a 3 foot 'type A' cable connection that plugs into any PC or MAC USB port.

Plugging the device into the USB Port, it is automatically detected and installed. The USB to RS485 Converter is designed to make serial port expansion quick and simple. USB to RS485 Converter ใช้ต่อกับ USB port ของ PC หรือ Note Book แปลงเป็นสัญญาณ RS485 Communication. The USB to RS485 Converter is a cost-effective module for transfer serial data over USB. 2. USB Cable 1m. & Driver CDROM. 24AWG twisted pair Cable. To prevent noise to interfere with the communications, often twisted pair cable is used. Splicing of communications cable is not permitted. If handshaking is not necessary, an ordinary 4 wire telephone cable could be used, provided that the pins are cross-connected as shown in the picture below. These signals are commonly called A and B in RS485 systems. The RS485 interface allows the creation of multipoint networks.