Endress+Hauser Proline Promag L 400 - Enabling the Terminating Resistor; Ensuring the Degree of Protection; Degree of Protection IP66;67, Type 4 X Enclosure

Electrical connection Proline Promag L 400 PROFIBUS DP
44 Endress+Hauser
1. Loosen the 4 fixing screws on the housing cover.
2. Disable software addressing (OFF) via the top DIP switch 4 (SW).
3. Set the desired device address via the corresponding DIP switches.
 Example (→  19,  43): 1 + 16 + 32 = device address 49
The device demands rebooting after 10 s. After rebooting, hardware addressing
is enabled with the configured IP address.
4. Reverse the removal procedure to reassemble the transmitter.
7.4.2 Enabling the terminating resistor
PROFIBUS DP
To avoid incorrect communication transmission caused by impedance mismatch, terminate
the PROFIBUS DP cable correctly at the start and end of the bus segment.
• If the device is operated with a baud rate of 1.5 MBaud and under:
For the last transmitter on the bus, terminate via DIP switch 2 (bus termination) and DIP
switch 1 and 3 (bus polarization). Setting: ON – ON – ON (→  20,  44).
• For baud rates > 1.5 MBaud:
Due to the capacitance load of the user and the line reflections generated as a result,
ensure that an external bus terminator is used.
It is generally advisable to use an external bus terminator as the entire segment can
fail if a device that is terminated internally is defective.
OFF
ON
1 2 3
4
Bus polar.
Bus term.
Bus polar.
Not used
390 Ω
DIP 1
5V
26
27
220 Ω
DIP 2
0V
390 Ω
DIP 3
A0023063
 20 Termination using DIP switches on the I/O electronics module (for baud rates < 1.5 MBaud)
7.5 Ensuring the degree of protection
7.5.1 Degree of protection IP66/67, Type 4X enclosure
The measuring device fulfills all the requirements for the IP66/67 degree of protection,
Type 4X enclosure.
To guarantee IP66/67 degree of protection, Type 4X enclosure, carry out the following
steps after the electrical connection:
1. Check that the housing seals are clean and fitted correctly. Dry, clean or replace the
seals if necessary.
2. Tighten all housing screws and screw covers.
3. Firmly tighten the cable glands.
4. To ensure that moisture does not enter the cable entry, route the cable so that it
loops down before the cable entry ("water trap").