Siemens AS 235 appendix Power supply components, Bus components

This catalog is out of date, see note on page 1

When ordering the extension units it is possible to select whether the extension unit EE1 is to be delivered on its own, together with EE2, or together with EE2 and EE3. The following components are supplied:

• 1, 2 or 3 subracks
with slots for 14 I/O modules each
– For wire-wrap system	6DS9 002-8BB
– For Maxi-Termi-Point system	6DS9 002-8BA
• 1, 2 or 3 cable ducts, 2 U high	6DS9 906-8AB
• 1, 2 or 3 covers, 2 U high	6DS9 906-8BB
• Cable set for power supply
– For EE1 on its own	6DS9 908-8CA
– For EE1 (combined with further EE)	6DS9 908-8CB
– For EE2	6DS9 908-8CC
– For EE3	6DS9 908-8CD
• Cable set for I/O bus, + 5 V, 0 V
– With EE1 on its own	6DS9 911-8FA
– With EE1 and EE2	6DS9 911-8FB
– With EE1, EE2 and EE3	6DS9 911-8FC

The extension units are supplied directly with DC 24 V from the power distribution subrack. Each extension unit is fused sepa- rately with 16 A on the power distribution subrack. The DC 5 V supply for the I/O bus is taken from the power supply module SV2 (C79451-Z1359-U9) in the basic unit and applied via the cable set 6DS9 911-8.. .

In addition to the I/O modules, max. 2 interface modules for 20-m local bus N-V.24 can be inserted into the I/O slots of the AS 235 system.

Accessories for the extension units: see Ordering data “Further options for AS 235 basic cabinet”.

I/O modules

The I/O modules are the process interface of the AS 235 auto- mation system. They comprise signal modules and function modules, including calculation modules. See Section 4 for the properties, functions and Ordering data of the I/O modules.

The basic unit of the AS 235 system has 6 slots for I/O modules. A further 42 I/O modules can be accommodated in the basic cabinet by inserting into 3 extension units with 14 slots each. A further 42 I/O modules can be inserted into an additional extension cabinet with up to 3 extension units, thus enabling a total of 90 I/O modules per AS 235 system.

One ES 100 K extension system can additionally be connected per I/O bus.

During planning it should be noted that the 16 A with which each extension unit is fused must not be exceeded.

The I/O modules can be supplied coded, inserted and with labelled slots. Arrangement, designation and connection dia- grams (including address data) are required from the orderer.

• Coding, inserting and labelling	6DS5 705-8AA
for 1 I/O module

Power supply components

The standard DC 24 V power supply unit of the AS 235 system comprises:

• Power distribution subrack for DC 24 V	6DS4 407-8CA
with slots for 2 bus converters UI,
8 automatic circuit-breakers,
1 supply diode, terminal and alarm strip,
overvoltage protection
• Connection distributor for 20-m local bus	6DS9 207-8AA
• Flashing pulse generator	6DS1 922-8AA
• 3 cabinet power supply terminals	C79165-A3012-D73

Automation systems

AS 235

Basic cabinet

•Combination of alarms as well as triggering of cabinet lamps and the cabinet row lamp (AS 235 H)

•Combination of cabinet lamps for the basic unit

•Generation of a flashing pulse for I/O modules of the TELEPERM ME process control system

•Supply of an external minutes pulse

•Connection distributor for 20-m local bus (e.g. for central con- figuring with PROGRAF AS+).

The DC 24 V supply is not redundant as standard. However, the power distribution subrack is prepared for a redundant supply of DC 24 V. A redundant supply of DC 24 V into the cabinet is also possible by installing a second supply diode and an extension set consisting of capacitor, a cable set and 2 cabinet supply ter- minals. These must be ordered separately.

The flashing pulse generator has 3 functions:

•Generation of a flashing signal which is required by the I/O modules of the TELEPERM ME process control system for alarm display (see Section 4 for modules)

•Signal lamp test using the LT key on the front panel (wiring optional)

•Electrical isolation of external time synchronization signals. The AS 235 can be synchronized using a minutes pulse.

Bus components

The TELEPERM M systems can communicate with one another via the CS 275 plant bus up to distances of 20 m (local bus) or 4 km (remote bus).

The local bus is redundant as standard. The remote bus can be redundant as an option.

Up to 9 participants can be interconnected as a local bus island via the 20-m local bus (each bus converter Ul counts as 1 par- ticipant). The total length of the connecting cables must not exceed 20 m.

Interface modules for 20-m local bus (e.g. N-AS and N-V.24) of local bus participants can be connected together at the front using cables 6DS8 201-8.. . These cables are only provided with a plug at one end. They must be connected 1:1 at the free end to the plug of the adjacent local bus participant. If a cable is not yet connected there, a front plug 6DS9 200-8AA is required in addition. The cable 6DS8 205-8.. with 2 plugs can be used as an alternative to the combination of cable 6DS8 201-8.. and front plug.

It is possible to connect a personal computer via the connection distributor for 20-m local bus in the power distribution subrack. It must first be integrated into the local bus via a cable connector 6DS8 201-8.. or, in the case of a remote bus connection, via a cable 6DS8 204-8LC / 6DS9 201-8CA (see connection unit). Central configuring and feedback documentation of the AS 235 can be carried out in conjunction with the PROGRAF AS+ engi- neering tool (cf. Section 2).

The AS 235 is connected to a single remote bus via the interface connection unit.

The AS 235 can also be operated on a redundant remote bus. 2 bus converters UI and 2 remote bus connector boards AF are installed in this case. The interface connection unit for redundant remote bus is required for the connection to a redundant remote bus.

The power distribution subrack has separate automatic circuit- breakers for the basic unit and up to 6 extension units in the basic cabinet and the extension cabinets. The major functions of the power distribution subrack are:

•Supply of DC 24 V to a cabinet or a cabinet group

•Fusing of L+ and PM for the extension units and 24-V heat exchanger

•Separate supply of 2 bus converters with DC 24 V

Siemens PLT 111 · 1999 3/5