Siemens appendix Basic system, AS 235 K automation system

This catalog is out of date, see note on page 1

Automation systems

AS 235 K

Basic system

AS 235 K automation system

￿The AS 235 K automation system is the compact version of the AS 235 system. Both systems use the same central unit modules, interface modules and I/O modules. They also have the same range of functions.

The AS 235 K system is fully operable on its own without any extensions. Since the number of I/O modules which can be plugged into the AS 235 K system is limited to 6, however, the AS 235 K is usually used together with ES 100 K extension systems (see page 3/21).

Basic system

￿The AS 235 K automation system is available for AC 230 V and DC 24 V supply voltages. The basic system of the AS 235 K automation system comprises:

•ES 902 subrack

–For AC 230 VC79451-A3260-A16

–For DC 24 VC79451-A3260-A17 each with

power supply subrack with slots for

power supply and alarm logic modules, 6 slots for I/O modules 1),

process connection panel for I/O modules 1 to 6, mounting plate with slots for

2 connector boards AF “Remote bus” and slots for 2 bus converters UI,

power supply unit,

cable clamping rail with 10 clamps

•Power supply module SV1

For AS 235 K with AC 230 V:
– AC 230 V / DC 24 V	C79451-A3260-A20
For AS 235 K with DC 24 V:
– DC 24 V / DC 24 V	C79451-A3260-A25
• Power supply module SV2,
DC 24 V / DC 5 V	C79451-Z1359-U9
• Alarm logic module	6DS1 901-8BA
• Bus terminator module	C79458-L445-B20
• Flashing pulse generator	6DS1 922-8AA
• Central processing unit with
– Central processor module	6DS1 140-8AA
– EDC memory module 4000 Kbyte	6DS1 844-8FA
– Backup battery for memory module	W79084-U1001-B2
– AS 235 system software, version G	6DS5 323-8AG
– Interface module for I/O bus 1	6DS1 312-8BB1)
• Interface module for mini floppy disk unit	6DS1 326-8BB
• Interface module for operation channel 1	6DS1 330-8CA

The subrack of the AS 235 K system corresponds to the ES 902 system and is 15 U high. It is the supporting system for the other components of the basic system, the bus components, and the I/O modules.

The front of the subrack contains a process connection panel for the process signal cables with Maxi-Termi-Point connections (pins 2.4 mm x 0.8 mm). The rear of the process connection panel is wired to the base plugs X2, i.e. the process interfaces of the 6 I/O modules in the basic system.

Two power supply modules are used for the basic system:

•Power supply module SV1

One of the following modules is used depending on the selected supply voltage for the AS 235 K:

–C79451-A3260-A20 (AC 230 V / DC 24 V) or

–C79451-A3260-A25 (DC 24 V / DC 24 V).

Both designs are equipped with 3 sockets via which 2 process operation keyboards and a mini floppy disk unit can be pow- ered with DC 24 V.

•Power supply module SV2

The power supply module SV2 (C79451-Z1359-U9) converts DC 24 V into DC 5 V for the central processing unit and the I/O bus interface modules.

Communication

via CS 275 plant bus

	SV	SV	M B
			L T
	4(6) I/O		ZE
	modules
	PA		UI1 UI2
	AF1	AF2	E
	GS
	I/O bus
SV	M
	L
	13 I/O		MO	MO
	modules
SV	M		PBT, ST
	L	E
13 I/O
modules
	PA		DR

	E	AF	Connector board for remote bus
		BT	Flashing pulse generator
		DR	Printer
ES 100 K (max. 8)		E	Power supply unit
		GS	Basic system
		ML	Alarm logic module
		MO	Monitor
		PA	Process connection panel
		PBT	Process operation keyboard
		ST	Configuring keyboard
		SV	Power supply module
		UI	Bus converter
		ZE	Central unit

Fig. 3/7 AS 235 K automation system, system configuration

The alarm logic module monitors the 24-V voltages L+ and PM, the +5-V voltage and the optionally used signal inputs for tem- perature monitoring, door contact and spare contact. Error mes- sages via these signal inputs as well as further system mes- sages trigger a flashing LED and a relay of the module at the same time. This common alarm can be switched via this relay to an external signalling lamp for another signalling device.

The flashing pulse generator has the following functions:

•Generation of a flashing signal which is required by the

I/O modules of the TELEPERM ME process control system for alarm display. The flashing signal is fused in the flashing pulse generator

•Lamp test for the fault display of the I/O modules which are supplied with the flashing signal

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

1)If I/O slot 6 is used, the interface module for I/O bus 2 (B) is required in addition. See AS 235 K functions for Ordering data.

3/18 Siemens PLT 111 · 1999