Siemens Official Manual for Data Bus Couplers - Models CS 275

This catalog is out of date, see note on page 2

Bus coupler

Technical data and ordering data

AF	Connector board ”Remote bus”
UI	Bus converter

Fig. 4/20 Bus coupler BK-FF, function diagram

The DC 5-V supply required to operate the interface module for bus coupler (N-BK) is obtained from the 24-V supply by a switching controller on the power supply module 6DS1 000-8AA.

The bus coupler subracks can be fitted either in their own cabi- nets or in the cabinet of an AS automation system depending on the type of remote bus coupling.

Technical data

Power supply module
Power supply	DC 24 V
Current consumption	1 A
Bus converter unit UI
Power supply	DC 24 V
Current consuption	450 mA
Fuse	1.6 A medium-slow
Interface
Remote bus	Biphase signals,
	level approx. 1 V

Ordering data

	Order No.
Bus coupler, consisting of
Subrack	6DS9 003-8CA
provided for bus couplers for
remote bus coupling (BK-FF)
Power supply module	6DS1 000-8AA
DC 24 V/DC 5 V, 18 A
Interface module N-BK for bus couplers,	6DS1 223-8AB
8 bit
Bus converter UI,	6DS4 400-8AB
required for remote bus coupling
(2 off required for single remote buses, 4 off for
redundant remote buses)
Connector board AF ”Remote bus”	6DS9 203-8DA
with terminating resistor F and
with mounting plate, for rack-mounted systems;
1 connector board is required per bus converter
unit UI if not already installed in the cabinet
Overvoltage fine protection, can be retrofitted	6DS9 210-8AA
(see page 4/16)
Cable connector for 20-m local bus	6DS8 204-8MB
with 3 plugs for connecting the interface
modules (N-BK) to the bus converters UI
(2 off required for BK-FF)
Cable set for power supply
to connect the bus coupler subrack to the
power distribution subrack DC 24 V mounted in
cabinet 1
¯ Bus coupler subrack in cabinet 1	6DS9 908-8AA
Tier A (height module U 2 to 7)
Tier B (height module U 10 to 15)	6DS9 908-8AB
Tier C (height module U 18 to 23)	6DS9 908-8AC
Tier D (height module U 26 to 31)	6DS9 908-8AD
¯ Bus coupler subrack in cabinet 2
Tier A (height module U 2 to 7)	6DS9 908-8AE
Tier B (height module U 10 to 15)	6DS9 908-8AF
Tier C (height module U 18 to 23)	6DS9 908-8AG
Tier D (height module U 26 to 31)	6DS9 908-8AH
Instructions
Bus coupler units
German	C79000-B8000-C5
English	C79000-B8076-C5
French	C79000-B8077-C5
Spanish	C79000-B8078-C5

4/14 Siemens PLT 130 . 1994