HOW TO GET 2 WAY RELAY CONTROL ON IP NETWORKS
HOW TO GET TWO WAY RELAY CONTROL ON IP
By: Don McClatchie
When you look around today, you can see that we are surrounded by devices and machines that make our lives easier. Most of these devices use communication as the main focus of their function like cell phones and computer controlled equipment. These devices use wired or wireless data communication to get the information they need to be useful.
In the Television Broadcast, Cable TV, Security industry, and for Industrial Control data communication is needed to keep everything working correctly. The need to control equipment from a distance is used in all of these industries and one of the easiest ways is to use the internet and IP communication for control.
Unlike radio, subcarrier or microwave STL Studio to Transmitter Links the internet has the ability to send two-way information in the form of data, and it is available for connection in most places. All that is needed is the interface between the control contacts (switches) and the IP data connection and then at the other end of the network a similar device connected to the same network that has relay contact outputs to attach to the other equipment for remote control. By addressing the two units to communicate exclusively you can have a dedicated and secure remote control two way path for relay control.
The equipment you can use for two way relay control is called the IP4x4N. One unit at each end of any network will supply four contact relay controls in each direction for gate control, annunciation, transmitter control, access control, intruder alert alarms, command verification, backup switching or STL failure alerts, basically anything that can be done via relay control.
Each IP4x4N unit has four LED indicators for the switch inputs to indicate the condition of the input switches, and four LED indicators for the condition of the output relays. There is also an LED for power and a Link alarm in indicate if communication between the two units are interrupted.
The units are independently addressable for any IP address and Subnet and have a password protect feature if desired. Connection directly by a network wire is possible by using of a reverse wire cable and if using network switches direct connection via straight network cable is used.
RELAY TRANSMITTER RELAY RECEIVER
If one-way relay control is desired the IPG8T/R units can be used in the same way with up to eight contact switch / relay controls. The IPG8T/R consists of a transmitter unit and a receiver unit and it sends controls in one direction only.