Electrical connection Liquistation CSF48
54 Endress+Hauser
2. External terminating resistor
Here, leave the DIP switches on the module board in the "OFF" position (factory setting).
‣ Connect the resistor to terminals 81 and 82 on the front of module 485 for 5-V power
supply.
The external terminating resistor is used.
6.8 Hardware settings
Setting the bus address
‣ Set the desired bus address via the DIP switches of module 485.
For PROFIBUS DP, valid bus addresses are anything between 1 and 126, and anything
between 1 and 247 for Modbus. If you configure an invalid address, software addressing is
automatically enabled via the local configuration or via the fieldbus.
6.9 Guaranteeing the degree of protection
Only the mechanical and electrical connections that are described in this manual, and are
necessary for the required, designated application, may be established on the device supplied.
‣ Please play close attention when performing the work as degrees of protection individually
confirmed for this product (ingress protection (IP), electrical safety, EMC interference
immunity, Ex protection) can no longer be guaranteed in the case of the following, for
example:
– Leaving off covers
– Loose or insufficiently tightened cables/cable ends
a0016322
Fig. 74: Valid PROFIBUS address 67
a0016323
Fig. 75: Valid Modbus address 195
a0016324
Fig. 76: Invalid address 255
1)
1) Order configuration, software addressing is enabled, software address configured at the factory: PROFIBUS 126,
Modbus 247
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