Specifications

39
flowserve.com
MX Protection, Control and Monitoring Features FCD LMENTB2300-01 – 07/08
13.4 Network Wiring – DeviceNet
Please refer to LMENIM2328 for detailed installation instructions.
DeviceNet is a CAN - based protocol that uses 5 wires including a shield. Two of the conductors are
used for 24V DC power & 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. Limitorque recommends Belden cable for connecting to a
DeviceNet network. The specifications for thick and thin cable (per site requirements) are as follows:
Table 13.3 – Belden 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)
Table 13.4 – Total cable length between repeaters or nodes:
Network Size 125 KBPS 250 KBPS 500 KBPS
Thick Trunk Length 500 m (1,640 ft) 250 m (1,640 ft) 100 m (1,640 ft)
Thin Trunk Length 100 m (328 ft) 100 m (328 ft) 100 m (328 ft)
Flat Trunk Length 380 m (1,250 ft) 200 m (656 ft) 75 m (246 ft)
Maximum Drop Length 6 m (20 ft) 6 m (20 ft) 6 m (20 ft)
Cumulative Drop Length 156 m (512 ft) 78 m (256 ft) 39 m (128 ft)
Note: Each actuator includes 0.60 meters of internal drop length.