Proline Promass Q 300
34
Hauser
Cable entries
• Cable gland: M20 × 1.5 with cable ⌀ 6 to 12 mm (0.24 to 0.47 in)
• Thread for cable entry:
– NPT ½"
– G ½"
– M20
• Device plug for digital communication: M12
Only available for certain device versions → 26.
Cable specification
Permitted temperature range
Minimum requirement: cable temperature range ≥ ambient tempe20 K
Power supply cable
Standard installation cable is sufficient.
Protective ground cable
Cable: 2.1 mm
2
(14 AWG)
The grounding impedance must be less than 1 Ω.
Signal cable
Current output 4 to 20 mA HART
A shielded cable is recommended. Observe grounding concept of the plant.
PROFIBUS PA
Twisted, shielded two-wire cable. Cable type A is recommended .
For further information on planning and installing PROFIBUS PA networks see:
• Operating Instructions "PROFIBUS DP/PA: Guidelines for planning and commissioning"
(BA00034S)
• PNO Directive 2.092 "PROFIBUS PA User and Installation Guideline"
• IEC 61158-2 (MBP)
FOUNDATION Fieldbus
Twisted, shielded two-wire cable.
For further information on planning and installing FOUNDATION Fieldbus networks see:
• Operating Instructions for "FOUNDATION Fieldbus Overview" (BA00013S)
• FOUNDATION Fieldbus Guideline
• IEC 61158-2 (MBP)
Modbus RS485
The EIA/TIA-485 standard specifies two types of cable (A and B) for the bus line which can be used
for every transmission rate. Cable type A is recommended.
Cable type
A
Characteristic impedance
135 to 165 Ω at a measuring frequency of 3 to 20 MHz
Cable capacitance
< 30 pF/m
Wire cross-section
> 0.34 mm
2
(22 AWG)
Cable type
Twisted pairs
Loop resistance
≤110 Ω/km
Signal damping
Max. 9 dB over the entire length of the cable cross-section
Shield
Copper braided shielding or braided shielding with foil shield. When grounding
the cable shield, observe the grounding concept of the plant.
Current output 0/4 to 20 mA
Standard installation cable is sufficient.
