Siemens appendix AS 235 H automation system

More information on the topic of redundancy can also be found in Section 2, page 2/3 “Redundancy with AS 235 H”

This catalog is out of date, see note on page 1

Automation systems

AS 235 H

Basic cabinet

AS 235 H automation system

￿The AS 235 H automation system is the high-availability cabinet version of the AS 235 range. In contrast to the simple cabinet version, the AS 235 H is of redundant design and operates according to the 1-out-of-2 principle.

Communication

via CS 275 plant bus

SVSV

It is possible to implement interruption-free operation with a fully- redundant basic unit, the I/O bus (redundant as standard), the I/O bus comparator and switchover modules, and redundant I/O modules.

The AS 235 H must be ordered in the form of 2 separate ordering units: the basic cabinet and the extension cabinet:

The basic cabinet is the main component of the AS 235 H auto- mation system. It contains all components required for the

AS 235 H system to function and is fitted with up to 3 extension units. It can therefore also be used on its own without an exten- sion cabinet.

The extension cabinet is used to increase the number of slots available for I/O modules. It can only be operated in conjunction with the basic cabinet and can be equipped with up to 4 exten- sion units. Together with the extension cabinet it is possible to increase the number of slots for I/O modules in the basic cabinet (39) to a total of 91.

Basic cabinet

The basic cabinet consists of the following main components:

GE
ZE I	ZE II

I/O bus I/O bus

EE
13 I/O	MO
modules	(max. 7)

DR	Printer
			PBT, ST
EE	Extension unit
GE	Basic unit
MO	Monitor
PBT	Process operation keyboard	DR
ST	Configuring keyboard
SV	Power supply module
ZE	Central unit

MO

Basic unit
The basic unit of the AS 235 H automation system consists of
2 identical partial systems which are designed symmetrically
and which operate in synchronism and redundant to one
another. A non-redundant basic unit can also be ordered.
The redundant basic unit comprises:
• Subrack	6DS9 027-8AB
• Power supply subrack DC 24 V / DC 5 V	6DS4 432-8AA
• 2 power supply modules	C79451-Z1359-U9
DC 24 V / DC 5 V
￿• Backup module DC 24 V	C79451-A3125-B227

• Central processing units ZE I and ZE II with
– 2 central processor modules	6DS1 141-8AA
– 2 EDC memory modules 4000 Kbyte	6DS1 844-8FA
– 2 backup batteries for memory module	W79084-U1001-B2
– AS 235 system software, version G	6DS5 323-8AG
– 2 interface modules for I/O bus 1	6DS1 312-8BB
– 2 synchronization modules	6DS1 143-8AA
– Comparator/coupling module	6DS1 142-8AA
• 2 interface modules	6DS1 326-8BB
for mini floppy disk unit
• 2 alarm logic modules 1)	6DS1 901-8AA
• 2 bus terminator modules	C79458-L445-B20
• Cable set	6DS9 908-8GA
• Cable duct, rear	6DS9 906-8AA
• Cable duct, horizontal (rear)	6DS9 906-8AB
• Cable duct, horizontal (front)	6DS9 906-8TA
• Cover with wiring duct	6DS9 927-8AA

The non-redundant basic unit comprises:

• Subrack	6DS9 027-8AB
• Power supply subrack DC 24 V / DC 5 V	6DS4 432-8AA
• Power supply module DC 24 V / DC 5 V	C79451-Z1359-U9
• Backup module DC 24 V	C79451-A3125-B227

Fig. 3/4 AS 235 H automation system, system configuration

• Central processing units ZE I with
– 1 central processor module	6DS1 141-8AA
– 1 EDC memory module 4000 Kbyte	6DS1 844-8FA
– 1 backup battery for memory module	W79084-U1001-B2
– AS 235 system software, version G	6DS5 323-8AG
– 1 interface module for I/O bus 1	6DS1 312-8BB
– 1 synchronization modules	6DS1 143-8AA
• 1 interface module for mini floppy disk unit	6DS1 326-8BB
• 1 alarm logic module 1)	6DS1 901-8AA
• 1 bus terminator module	C79458-L445-B20
• Cable set	6DS9 908-8GA
• Cable duct, rear	6DS9 906-8AA
• Cable duct, horizontal (rear)	6DS9 906-8AB
• Cable duct, horizontal (front)	6DS9 906-8TA
• Cover with wiring duct	6DS9 927-8AA

The subrack for the central modules of the AS 235 H corre- sponds to the ES 902 packaging system and is 10 U high. It is the supporting system for the two central processing units, the comparator/coupling module and the interface modules for mini floppy disk unit, operation channel and 20-m local bus. The

3-Uhigh power supply subrack 6DS4 432-8AA accommodates the power supply modules required for the basic unit as well as the backup module.

The power supply module C79451-Z1359-U9 is used to supply the basic unit with DC 5 V. Each AS 235 H partial system is sup- plied from its own power supply module. The backup module compensates brief voltage dips in the DC 24 V supply.

The central processor modules of the AS 235 H basically corre- spond to those of the AS 235 system. The required clocks are no longer generated on the module itself but are supplied by the synchronization module.

1) Can be inserted into power supply subrack

Siemens PLT 111 · 1999 3/9