Introduction
Physical Layer | The physical layer contains a single twisted pair of shielded wires. The | |
| STB NIB 1010 INTERBUS implements the SUPI 3 (serial universal peripheral | |
| interface) ASIC from Phoenix Contact. | |
Network |
| |
The INTERBUS network observes a master/slave model with active ring topology, | ||
Topology | having all devices integrated in a closed transmission path. There are three types of | |
| busstructures in the ring: | |
| remote | |
| at the head) connects to this section. Remote bus characteristics include: | |
|
| 12.8 km (maximum) network length |
|
| 512 possible connections |
|
| 400 m (maximum) between devices |
| 256 devices (maximum) | |
| local bus (not | |
| remote substation enclosure. Local bus characteristics include: | |
|
| 8 devices (maximum) |
|
| 1.5 m (maximum) between devices |
|
| 10 m (maximum) network length |
| 800 mA (maximum) current | |
| sensor | |
| without the use of bridge routers. Sensor loop characteristics include: | |
|
| 1 unshielded pair (+24 V) |
| 32 devices (maximum) | |
|
| 10 m (maximum) network length |
Note: An Advantys STB island with an INTERBUS NIM head can be implemented only as a remote bus node.
Transmission While it is possible to connect INTERBUS devices with a variety of media (fiber
Mediaoptics, SMG, etc.), the STB NIB 1010 NIM only supports networks that are connected with twisted pair copper wiring
14 | 890USE19600 April 2004 |