GE Industrial Solutions OKCV3000CN DeviceNet - Manual (Page 56)

GEl- 100343
Because of the flexibility of DeviceNet, there are several power design choices. This section provides guidelines
to help configure power along a network in a way that maximizes performance and minimizes cost.
Power configuration is adjustable based on your system requirements.
The DeviceNet power bus is supplied by a nominal 24-volt source and can support up to 8 amps on any section
of thick cable trunk line or up to 3 amps on any section of thin cable trunk line. Since this much current can be
drawn from each side of a power tap, a single supply network can possibly provide twice these current levels. If
the system has even greater requirements, DeviceNet can support multiple power supplies which can result in
almost unlimited power. The majority of DeviceNet applications, however, will require only one power supply.
How to configure the power
1. To configure the power, just follow the steps below:
2. Add the current requirements of any devices in your network.
3. Calculate the length of your network
4. Use the table below to check the current capability, based on:
a. the length of the cable
b. the current requirements of the network
c. the type of cable used
d. if the current requirement is less than the values found in the tables, then any configuration can be used
5. Ifthe current requirement is greater than the values found in the tables, look at the configurations in follow-
ing sections.
50 (164) 5.42
100 (328) 2.93
150 (492) 2.01
200 (656) 1.53
250 (820) 1.23
300 (984) 1.03
350 (1148) 0.89
400 (1312) 0.78
450 (1476) 0.69
500 (1640) 0.63
Table 0.9.1.
mIIJ
APPENDIX D
Zb (82)