Technical data

60
W&T
3.9 Box-to-Box (tunneling measurement network)
In this mode the inputs of a Web-IO Analog are transferred to
the outputs of a second Web-IO. In this way you can for
example send signals from one location to another over a WAN
connection.
The values are sent as a percentage. This means a model
#57662 can send (“convert”) voltage values of 0…10V to a
model #57661 with current values of 0…20mA and vice-versa.
Feature: It is also possible to tunnel an analog value to a
receiving Web-IO from two different locations.
With Box-to-Box connections a Web-IO assumes the function
of the Master. The second Web-IO operates as a Slave. The Slave
(Server) waits for the Master (Client) to open the connection.
The device which physically reads the analog values can be
configured as a slave or a master. The same applies to the
device which then outputs the analog values.
Note for safety-critical applications: Alarms can be defined in
both devices in case the Box-to-Box connection is interrupted.
It should then be possible for at least one of the devices to
send a message.
Both the Master and the Slave Web-IO need to be
correspondingly configured.