Endress+Hauser Liquiline CM444 - Ensuring the Degree of Protection

Liquiline CM442/CM444/CM448 Electrical connection
Endress+Hauser 35
2. 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.
1
2
4
8
16
32
64
128
on off
A0026776
 55 Valid PROFIBUS address
67
1
2
4
8
16
32
64
128
on off
A0026777
 56 Valid Modbus address
195
1
2
4
8
16
32
64
128
on off
A0026778
 57
Invalid address 255
1)
1)
Order configuration, software addressing is active, software address configured at the factory: PROFIBUS 126, Modbus
247
For detailed information on "Setting the address via software", see the Operating
Instructions → BA00444C
5.6 Ensuring the degree of protection
Only the mechanical and electrical connections which are described in these instructions and
which are necessary for the required, designated use, may be carried out on the device
delivered.
‣
Exercise care when carrying out the work.
Individual types of protection permitted for this product (impermeability (IP), electrical safety,
EMC interference immunity, Ex protection) can no longer be guaranteed if, for example :
• Covers are left off
• Different power units to the ones supplied are used
• Cable glands are not sufficiently tightened (must be tightened with 2 Nm (1.5 lbf ft) for the
permitted level of IP protection)
• Unsuitable cable diameters are used for the cable glands
• Modules are not fully secured
• The display is not fully secured (risk of moisture entering due to inadequate sealing)
• Loose or insufficiently tightened cables/cable ends
• Conductive cable strands are left in the device