Flowserve MX Electronic Actuator - Manual (Page 30)

Limitorque MX Electronic Actuator FCD LMENIM2306-06 – 10/13
30
3.3.9 Network Wiring – Profibus DP/PA Installation
Profibus DP is based on RS 485 communication. The standard EN 50170 specifies the cable for use with Profibus DP.
The following specifications need to be fulfilled by the Profibus cable:
Table 3.6 – Profibus cable specifications
Parameter Type – Profibus DP
Impedance 135 to 165 ohm/3 to 20 MHz
Capacity < 30 pF/m
Resistance < 110 ohm/km
Wire gauge > 0.64 mm
Conductor area > 0.34 mm 2
The Profibus DP cable is a shielded twisted pair cable.
In general, there are two different types of cables available. The most commonly used cable has solid wire for the
Profibus line. When there is a need for more flexiblity (bending) and higher environmental resistance, a cable with
stranded wire for the Profibus line and special jackets shall be used. Limitorque recommends the use of:
• Belden 3079A Specifications, 22 AWG, shielded, solid two conductor
Key Specifications
• Capacitance/ft = 8.5 pF
• Nominal Impedance (ohms) – 150.0
Network Wiring - Profibus PA
Please refer to IEC 61158 & ANSI/ISA S.50.02 Part 2-1992 for network wiring guidelines. Refer to Table 3.5 for
connections.
3.3.10 Network Wiring – DeviceNet
DeviceNet is a CAN-based protocol that uses five wires including a shield. Two of the conductors are used for 24 VDC
power and up to 8 amps (4 amps for NEC Class 2) may be passed along the hi-way from a suitable power source. Two
conductors are used for the CAN bus signals, CAN_H and CAN_L, which are usually smaller in diameter. Flowserve
recommends Belden 3082A cable for connecting to a DeviceNet network. The specifications for this cable are preferred.
Table 3.7 – DeviceNet cable specifications
Belden
Part No.
AWG (Stranding)
dia. Inches
Nom. DCR
Insulation
material
(color code)
Nominal
O.D.
Nom
Impedance
(ohms)
Nominal
Capacitance
Test
Frequency
(MHz)
Maximum
Attenuation
dB/100ft
3082A
2 – 15 AWG (19 x 28)
3.6 ohm/1000 ft
11.8 ohm/km
Power pair
(Black/Red)
12.2 mm 120 12.0 pF/ft
0.125
0.5
1
0.13
0.25
1.36
2 – 18 AWG (19 x 30)
6.9 ohm/1000 ft
22.7 ohm/km
Data pair
(Blue/White)
3084A
2 – 22 AWG (19 x 34)
17.5 ohm/1000 ft
57.4 ohm/km
Power pair
(Black/Red)
7.2 mm 120 12.0 pF/ft
0.125
0.5
1
0.29
0.50
1.70
2 – 18 AWG (19 x 36)
28.0 ohm/1000 ft
91.9 ohm/km
Data pair
(Blue/White)