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The following figures show the connection of the Ethernet communication interface module
CI521-MODTCP.
Fig. 136: Connection of the communication interface module CI521-MODTCP
Further information is provided in the System Technology chapter .
Connection of the digital inputs
The following figure shows the connection of the digital input DI0. Proceed with the digital inputs
DI1 to DI7 in the same way.
2022/01/31
Generally, analog signals must be laid in shielded cables. The cable shields
must be grounded at both sides of the cables. In order to avoid unacceptable
potential differences between different parts of the installation, low resistance
equipotential bonding conductors must be laid.
Only for simple applications (low electromagnetic disturbances, no high require-
ment on precision), the shielding can also be omitted.
3ADR010278, 3, en_US
Communication interface modules (S500) > Modbus
Device specifications
735
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