Serial Connection - TR-Electronic _LLB500(F)-00601 Benutzerhandbuch

Installation

6.2.5 Serial connection

Is mainly used for "Controlled-Mode" and the configuration of the measuring systems.
RS-232
Only point-to-point communication is possible when using the RS-232 interface.
Figure 15: Point-to-point connection with RS 232
RS-422
It is possible to connect multiple devices on a single RS-422 line. To ensure proper operation, strict
Master-Slave communication must be applied. It is important, that the Master has full control of the
communication and never initiates a new communication before termination of the previous
communication (answer from the LLB or timeout).
Figure 16: Connecting multiple devices with RS-422
 TR-Electronic GmbH 2011, All Rights Reserved
Page 116 of 156
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Danger of physical injury and damage to property by undefined
interface states !
Never connect multiple LLB´s on a RS-232 serial line
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• Danger of physical injury and damage to property by undefined
interface states !
Ensure, that all LLB´s are set to different ID numbers
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The RS-422 interface cannot be used simultaneous with the SSI interface.
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TR - ELE - BA - DGB - 0021 - 06
Printed in the Federal Republic of Germany
03/09/2016