Siemens AS 488/TM manual MIG II migration rack, Configuration possibilities for I/Os

This catalog is out of date, see note on page 3

Migration of existing systems

Migration packages

MIG II migration rack

■Overview

The MIG II migration rack has been developed further, and is a completely assembled ES 902 subrack for accommodating an AS 488/TM system which can be directly installed in the TELEPERM M standard cabinet instead of an AS 220 S, AS 230 or AS 235 basic unit.

It is designed as a 19-inch system, and equipped with the SIMATIC S7-400 backplane bus for accommodating the

AS 488/TM system modules (power supply, CPU and interface modules). Compared to the MIG I migration rack, it offers 5 slots for TELEPERM M I/O modules which are fitted on the right side of the rack. When converting, it is therefore possible to transfer 5 I/O modules from the basic unit of the automation system into the migration rack, making it unnecessary to find new slots for these. However, it is necessary to disconnect the process signal cables from the I/O slots, and to reconnect them. To do this, they must be separated between the cabinet connection element SAE and the basic unit. If no SAEs were previously installed for the I/O slot wiring of the basic unit, they must now be inserted in order to also compensate differences in length. The process sig- nal cables are connected at the rear using wire-wrap connec- tions, and are routed to the cabinet connection element SAE in a preassembled cable duct.

Two interface plugs for connection of the two I/O buses A and B are fitted at the rear on the right-hand wall. In general, the

I/O bus ribbon cables already present in the cabinet are used further. A flexible assignment of the 5 I/O slots to the two

I/O buses A and B is possible.

The previous addresses of the I/O buses can be used further in most cases, especially if slot addressing was not used. Slot ad- dressing is possible for the I/O slots available in the MIG II mi- gration rack, and is essential for certain modules. The slot addresses of the two I/O areas A and B can be selected just like frame addresses by setting jumpers in predefined groups. The settings are made from the front.

The circuit-breakers for the DC 24 V supply and for the signalling voltage PM are located at the front, and are readily accessible.

The interface for I & C messages of the cabinet has been de- signed in the MIG I migration rack as a preassembled cable for connection to the power supply assembly. With the MIG II migra- tion rack, a plug interface with screw terminals has been provid- ed similar to in the AS 235 system.

■Design

Configuration possibilities for I/Os

System-specific configuring of the I/Os means that the MIG II mi- gration rack can be used extremely flexibly either for the migra- tion of AS 230 systems or for AS 220 S and AS 235 systems with up to 5 I/O modules each in the basic unit.

When migrating an AS 220 S system, the 5 I/O modules of the migration rack can be combined with up to 3 extension units by pressing 2 ribbon cable plugs onto the existing I/O bus cable or by using the additional ribbon cable for 5 slots (see hardware options).

When migrating an AS 230 system, users can freely decide whether the 5 new I/O slots are to be operated together on the I/O bus, i.e. together with up to 3 extension units of the basic cabinet, or divided between the two I/O buses (e.g. 3 on

I/O bus A of the basic cabinet, and 2 on I/O bus B of the exten- sion cabinet). In addition, up to 4 extension units can be con- nected using a new ribbon cable to I/O bus B of the AS 230 system.

As with the AS 230 system, users can also freely decide for the AS 235 system whether all 5 I/O slots in the migration rack are to be operated on I/O bus A, or whether they are to be divided amongst I/O buses A and B. In contrast to the AS 235 system, even 4 extension units can be directly used in the extension cab- inet of the AS 488/TM system. The same technical conditions ap- ply to migration of the AS 235 system as to migration of the

AS 230 system.

The 5 I/O slots in the migration rack are assigned so-called frame addresses using plug-in jumpers, possibly resulting in dif- ferent slot addresses in each case.

As with the AS 230 K and AS 235 K systems, this flexible method permits the configuration of two I/O slots for connection of

ES 100 K extension systems (without compact housing).

ES 100 K interface modules 6DS1 322-8AA are then used in each case for the link. A total of 8 extension units or ES 100 K ex- tension systems can therefore be operated parallel to the

ET 200M distributed I/O system (any mixture of 4 on each I/O bus).

7/8 Siemens PLT 112 · 2002