Proline Promass E 300 Modbus RS485
Electrical connection
Hauser
33
7.1.3
Terminal assignment
Transmitter: supply voltage, input/outputs
The terminal assignment of the inputs and outputs depends on the individual order
version of the device. The device-specific terminal assignment is documented on an
adhesive label in the terminal cover.
Supply voltage
Input/output 1
Input/output 2
Input/output 3
1 (+)
2 (–)
26 (B)
27 (A)
24 (+)
25 (–)
22 (+)
23 (–)
Device-specific terminal assignment: adhesive label in terminal cover.
Terminal assignment of the remote display and operating module → 37.
7.1.4
Shielding and grounding
Shielding and grounding concept
1. Maintain electromagnetic compatibility (EMC).
2. Take explosion protection into consideration.
3. Pay attention to the protection of persons.
4. Comply with national installation regulations and guidelines.
5. Observe cable specifications .
6. Keep the stripped and twisted lengths of cable shield to the ground terminal as short
as possible.
7. Shield cables fully.
Grounding of the cable shield
NOTICE
In systems without potential matching, the multiple grounding of the cable shield
causes mains frequency equalizing currents!
Damage to the bus cable shield.
‣
Only ground the bus cable shield to either the local ground or the protective ground at
one end.
‣
Insulate the shield that is not connected.
To comply with EMC requirements:
1. Ensure the cable shield is grounded to the potential matching line at multiple points.
2. Connect every local ground terminal to the potential matching line.
7.1.5
Preparing the measuring device
NOTICE
Insufficient sealing of the housing!
Operational reliability of the measuring device could be compromised.
‣
Use suitable cable glands corresponding to the degree of protection.
1. Remove dummy plug if present.
2. If the measuring device is supplied without cable glands:
Provide suitable cable gland for corresponding connecting cable.
3. If the measuring device is supplied with cable glands:
