Proservo NMS81
Endress+Hauser 27
Cable entries
Ordering feature 090 "Electrical Connection"
1)
Cable entries (with blind plugs)
A 7 x thread M20
B 7 x thread M25
C 7 x thread G1/2
D 7 x thread G3/4
E 7 x thread NPT1/2
F 7 x thread NPT3/4
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...
Cable specification Terminals
Terminal Wire cross section
Signal and power supply
• Spring terminals (NMx8x-xx1...)
• Screw terminals (NMx8x-xx2...)
0.2 to 2.5 mm
2
(24 to 13 AWG)
Ground terminal in the terminal compartment max. 2.5 mm
2
(13 AWG)
Ground terminal at the housing max. 4 mm
2
(11 AWG)
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
Overvoltage protection
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
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