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Honeywell 2MLL-PSRA User Manual Page 30

Pnet i/f module.
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3. Installation and wiring
3.1. Installation
Precautions during installation of Profibus-DP module
Station number in the range of 0~99 is available for 2MLL-PSRA, and station number in
the range of 0~98 is available for 2MLL-PSEA.
The following precautions must be taken during the installation of the 2MLL-PSRA and
2MLL-PSEA modules.
Verify the basic factors necessary for the system configuration and select the
proper communication module.
Prepare the cable and accessories such as tab, terminal resistance, and so on to be
used for this communication.
The station number of all other stations including this module should be
different. If it is connected with more than one station number, it may cause the
communication error.
In case of operating with normal communication, the mode switch of master
module should be at RUN mode.
For communication cable, the designated standard cable should be used. If not, it
may cause significant communication obstacle.
Before installation, verify if the communication cable is cut off or short-circuited.
Tighten the communication cable connector completely and fix the cable
connection tightly. If the cable connection is not complete, it may cause significant
communication obstacle.
If the communication cable is twisted or if the cable is not connected properly, it
may cause communication error.
In case of connecting the long distance communication cable, the wiring should
be far from the power line or inductive noise.
Do not remove the PCB from its case. It can result in damage or an abnormal
If LED action is abnormal, refer to section Troubleshooting for causes.
Install the Profibus-DP module when the status of PLC power is 'OFF'.
Pnet I/F Module 2MLL-PSRA, 2MLL-PSEA User's Guide
November 2011


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