This catalog is out of date, see note on page 1
Automation systems
AS 235 H
Basic cabinet
Partial system I Partial system II
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| SV | Backup module | SV |
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| DC 24 V |
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| AMD | BK2 | EAB2 | BK1 | EAB1 | CPU |
| RAM | BAB/DG | SB | VKB | SB | BAB/DG | RAM | CPU | BK2 | EAB2 | BK1 | EAB1 | AMD |
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AS 235 H basic unit |
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| ML ML ML VD VD |
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| A | utomatic | ST1 |
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| 1 | 2 | 3 | 1 | 2 |
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GE |
AS 235 H |
EE1 |
EE2 |
EAVU |
EE3 |
SES |
EE4 |
EE5 |
EAVU |
EE6 |
EE7 |
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| V1 |
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| AV | UI | UI | BT |
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| Bus A | Bus B |
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| Power supply subrack |
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AMD | Interface module for mini floppy disk unit |
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AV | Connection distributor for |
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BAB | Bus terminator module |
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BK | Interface module for operation channel |
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BT | Flashing pulse generator |
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CPU | Central processor module |
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DG | Diagnostics interface |
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EAB | Interface module for I/O bus |
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EAVU | I/O bus comparator and switchover module |
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EE | Extension unit |
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GE | Basic unit |
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Fig. 3/5 AS 235 H automation system, design
The memory module with Error Detection and Correction EDC can correct a
The interface module for I/O bus establishes the connection between the
•The interface module for I/O bus 1 (A) is essential for partial systems I and II and is included in the delivery of the basic unit. Each of the two CPUs operating with synchronous clocks is connected to the I/O bus comparator and switchover modules (EAVU) of the basic cabinet via its own interface module and own I/O bus 1 (A). Both the two interface modules and the two I/O buses 1 (A) are redundant to one another. This enables
•The interface modules for I/O bus 2 (B) must be ordered addi- tionally (one module for each partial system). The interface modules are only required if an extension cabinet is used in addition to the basic cabinet.
AS 235 H basic unit | AS 235 H extension cabinet |
ML | Alarm logic module |
Interface module for | |
RAM | Memory module |
SB | Synchronization module |
SES | Power supply subrack |
ST | 24 V sockets for connection of keyboards |
SV | Power supply module DC 24 V / DC 5 V |
UI | Bus converter |
VSupply diode
VD | Diode module for linking signals |
VKB | Comparator/coupling module |
Each of the two partial systems has a synchronization module. The two modules are redundant to one another and linked together without feedback. Together with the comparator/cou- pling module they constitute the central components of the AS 235 H system responsible for the control, coordination and monitoring of the two partial systems. The synchronization mod- ule is also required for operation of a
Depending on the configuration of the automation system, the power supply subrack is equipped with one or more alarm logic modules:
•Alarm logic module ML1 (basic cabinet with 1 partial system)
•Alarm logic modules ML1 and ML2 (basic cabinet with 2 redundant partial systems)
•Alarm logic modules ML1, ML2 and ML3 (basic cabinet with 2 redundant partial systems and extension cabinet).
The alarm logic models monitor the central processing units and the optionally used signal inputs for temperature monitoring, door contact, fan contact and spare contact. In the event of a fault, the cabinet lamps on the basic and extension cabinets are triggered via these contacts.
3/10 | Siemens PLT 111 · 1999 |
