Cable Specification; Overvoltage Protection; Cable Entries - Endress+Hauser Proservo NMS81 Technical Information

Proservo NMS81

Cable entries

Cable specification

Overvoltage protection

Endress+Hauser
Ordering feature 090 "Electrical Connection"
A
B
C
D
E
F
1) Position 13 of the order code, e.g. NMx8x-xxxxxxxxxxxxA...
For the following devices with TIIS Ex d approval, cable glands are attached to the device (see
position 1 and 2 of the order code). These cable glands must be used.
Proservo NMS81-TC...
Terminals
Terminal
Signal and power supply
• Spring terminals (NMx8x-xx1...)
• Screw terminals (NMx8x-xx2...)
Ground terminal in the terminal compartment
Ground terminal at the housing
Power supply line
Standard device cable is sufficient for the power line.
HART communication line
• Standard device cable is sufficient if only the analog signal is used.
• Shielded cable is recommended if using the HART protocol. Observe the grounding concept of the
plant.
Modbus communication line
• Observe the cable conditions from the TIA-485-A, Telecommunications Industry Association.
• Additional conditions: Use shielded cable.
V1 communication line
• Two wire (twisted pair) screened or un-screened cable
• Resistance in one cable: ≤ 120 Ω
• Capacitance between lines: ≤ 0.3 µF
On the communication and power lines; according to IEC 60060-1 /DIN 60079-14:
10 kA, 8/20 μs, 10 pulses according to IEC 60060-1 / DIN 60079-14
1)
Cable entries (with blind plugs)
7 x thread M20
7 x thread M25
7 x thread G1/2
7 x thread G3/4
7 x thread NPT1/2
7 x thread NPT3/4
Wire cross section
0.2 to 2.5 mm
max. 2.5 mm
max. 4 mm 2
2 (24 to 13 AWG)
2
(13 AWG)
(11 AWG)
27