Schneider Electric 890USE19600 Version 1.0, INTERBUS Basic Network Interface Module manual

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
	bus￿structures in the ring:
	remote bus—The Advantys STB island (with an STB NIB 1010 INTERBUS NIM
	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 supported)—The local bus ring is used to connect I/O devices in a
	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 loop—The sensor loop is connected directly to sensors and actuators
	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 (RS-485). Network connectors (in and out) are 9-pin SUB-D types. The TDMA transmission method is implemented for transmission rates of 500 kbits/s.

14 890USE19600 April 2004