Siemens AS 235 appendix Connection distributor AV, Bus converter Ul, Redundant remote bus

This catalog is out of date, see note on page 1

Bus communication

Design

Connection distributor AV

	N-AS
6DS9	201-8CA or
6DS8	204-8.. (without AV)	6DS8 201-8..

		AF	AF
AV
UI	UI	Remote bus A
		Remote bus B

or

N-AS N-AS

6DS9 201-8CA + 6DS8 201-8.. or

6DS9 201-8FC

with 5 plugs

The connection distributor AV (Order No. 6DS9 207-8AA) has a vacant plug connection to the redundant 20-m local bus for the connection of configuring aids (e.g. personal computer with the PROGRAF AS+ engineering tool). It must be connected to the local bus via a cable for this purpose.

Bus converter Ul

A bus converter is required to connect individual participants or a local bus with several participants to a remote bus. It performs continuous signal conversion between the local bus and the remote bus or vice versa without intermediate storage. The cou- pling is inductive and non-reactive.

Possible locations:

•AS 235 and AS 235 H basic cabinet

•AS 235 K basic system

•Remote bus connection unit

•Bus coupler

Fig. 6/6 Connection of a redundant remote bus (AS 235 / AS 235 K/ AS 235 H)

Redundant remote bus

2 bus converters UI are required to connect an automation sys- tem to a redundant remote bus. The bus converters are con- nected

•in the AS 235 system via a cable 6DS9 201-8CA to the N-AS and the connection distributor AV,

•in the AS 235 H system via a cable 6DS9 201-8FC to both N-AS and the connection distributor AV, and

•in the AS 235 K system via a cable 6DS8 204-8MB to the N-AS.

• Remote bus connection subrack.

See Catalog PLT 130 for detailed information on the bus con- verter.

Connector board AF "Remote bus"

The remote bus cable is connected to the bus converter via the connector board AF "Remote bus". The board is provided with a terminating resistor which can be activated using a jumper. The resistor is activated in the first and last bus participants.

When converting/retrofitting, cable combinations together with the cable 6DS8 201-8.. are possible instead of the above cables (cf. Fig. 6/6).

Local bus interface modules

Interface module for	For connection of the following systems and
20-m local bus	devices to the CS 275 plant bus
Type
N-AS	AS 235 and AS 235 K automation systems
6DS1 223-8AC
N-AS	AS 235 H automation system
6DS1 223-8AA

e.g. TELEPERM M cabinet with

AS 235 H

UI UI

AF	AF
a	a

e.g. remote bus connection unit (OS 525)

UI	UI
AF	AF

e.g. TELEPERM M cabinet

UI	UI
AF	AF
a	a

N-BK	Bus coupler
6DS1 223-8AB
N-AT	OS 525 / WinCC/TM-OS operator systems,
6DS1 222-1AB10/20	AT-compatible personal computers,
	SIMATIC PC and PG programming devices
N-V.24	Computers from other manufacturers via V.24
6DS1 202-1AB	or 20-mA current loop interface
N-S5 1)	SIMATIC S5-155U programmable controllers
6DS1 206-8AA

1) Discontinued product

Further information on the various interface modules can be found in Catalog PLT 130 and the following manuals:

• CS 275 bus system	C79000-G8076-C6
• N-V.24 coupling of computers from
other manufacturers	C79000-G8076-C87

• KSN-S55 / S5-155U programmable controller C79000-G8076-C319

Remote bus A Remote bus B

a Terminating resistor F (activated by jumper)

Fig. 6/7 Redundant remote bus with terminating resistors

Overvoltage protection

The participants connected to the remote bus can be exten- sively protected against destruction by overvoltages by means of the coarse and fine overvoltage protection units.

The coarse protection limits high-voltage signals of high power to the arc voltage. The coarse protection is able to handle brief peaks in the kA range. It is installed where the remote bus enters the building. The fine protection reduces the residual voltage which passes the coarse protection down to a value between the internal conductor and the screen of the remote bus cable which is harmless for the amplifier of the inductive coupler in the bus converter. The fine protection is fitted on the connector AF.

6/4 Siemens PLT 111 · 1999