Siemens CS 275 manual Bus converter unit UI

This catalog is out of date, see note on page 2

Bus converter unit UI

Description and ordering data

1LED ET (green), flashes in rhythm with the messages received

from the remote bus

2LED F (red), signals faults (line protocol faulty, transfer element

format faulty)

3LED B (green), indicates setting of module on bus B

4 LED A (green), indicates setting of module on bus A 5 Reset key RS

6 LED SV (green), signals the presence of all operating voltages

7 Coding jumper

8	Power supply unit	Fig. 4/10 Bus converter, function diagram
9	Bus interface
10	Inductive coupler

Fig. 4/9 Bus converter 6DS4 400-8AB

Application

To convert signals from a 20-m local bus to a 4-km remote bus. Signal coupling-in and coupling-out inductive and without feed- back.

Design

The bus converter consists of 3 single-height modules. Front panel width:

Power supply unit	30.48 mm = 2 standard slots
Bus interface	15.24 mm = 1 standard slot
Inductive coupler	45.72 mm = 3 standard slots

The bus interface module has a 20-m local bus interface and constitutes the input of the bus converter. The inductive coupler module has 2 lengths of coaxial cable fixed to the front panel. These are screwed onto the connector board AF (page 4/10) and form the connection to the remote bus cable.

Possible plug-in locations:

AS 235 K automation system, basic unit

AS 235 automation system, power distribution subrack in the basic cabinet

AS 235 H automation system, power distribution subrack in the basic cabinet

Remote bus connection unit (e. g. for OS 520 and OS 265-3 desk-top units)

Remote bus connection subrack (e. g. for SIMATIC S5-155 U, SICOMP industry-standard PC or OS 265-3 rack-type version) Bus coupler (BK-FF).

1)Redundant 24 V supply only when a remote bus connection subrack 6DS4 426-8AA is used

Technical data
Power supply	DC 24 V (20 to 33 V)
Current consumption	450 mA
Module fuse	1.6 A medium-slow
Interfaces	TTL level, open collector, asymmetric,
- Local bus
- Remote bus	redundant
	Biphase signals
	(levels approx. 1 V)
Signal coupling-in	inductive, reaction-free
Weight	Approx. 1.18 kg

Ordering data

	Order No.
Bus converter (UI),	6DS4 400-8AB
consisting of power supply unit, bus interface
and inductive coupler
Instructions
Bus converter, inductive	Order No
German	C79000-B8000-C4
English	C79000-B8076-C4
French	C79000-B8077-C4
Spanish	C79000-B8078-C4

Siemens PLT 130 . 1994 4/9