Siemens AS 235 appendix Simatic S5 expansion units, Parallel coupling with S5-115U I/O modules

This catalog is out of date, see note on page 1

CC/EU	.
interface module
IM 310	ER 701-1
AS 235,
AS 235 H,
AS 235 K,
ES 100 K	ER 701-2
I/O bus

ER 701-1

ER 701-2

.

2.5 m	coupling)
Max.	(central

Coupling with other systems

SIMATIC S5 expansion units

Parallel coupling with S5-115U I/O modules

Up to 6 interface modules 6DS1321-8AA with a total of 12 usable channels can be operated per AS 235 automation system.

The interface module can be inserted into any slot for I/O mod- ules of an AS 235 automation system or ES 100 K extension sys- tem. The module has two bit-parallel RS 422 interfaces via which direct access (without intermediate storage) is possible to the SIMATIC S5 I/O modules. The CC/EU interface module IM 310 is used for the coupling at the SIMATIC end. This is inserted into slot 7 of the ER 701-2 subrack for extension units.

The maximum distance between the interface module

Channel 1		Connecting cable
Connecting cable		721-0
721-0		Terminator
	Channel 2
Interface module
6DS1 321-8AA	Max. 500 m (distributed coupling)

6DS1 321-8AA and the last expansion unit is 500 m with a dis- tributed coupling.

Data transfer between the central processing unit of an AS 235 automation system and the SIMATIC S5-115U I/O models is han- dled by the driver blocks AA and AE for analog values and the drivers A110 and E 110 for binary values.

The maximum permissible difference in the M potential between the AS 235 automation system and the expansion unit is 7 V.

Fig. 7/1 Coupling of automation systems with SIMATIC S5-115U I/O modules, fitted in ER 701 subrack for expansion units

See page 7/7 for interface module 6DS1 321-8AA.

Parallel coupling with SIMATIC S5-115U I/O modules

￿The SIMATIC S5-115U I/O modules provide the user of the TELEPERM M process control system with a further comprehen- sive range of I/O modules for optimizing the field connections.

Of major advantage is that signal voltages up to 250 V can be used with these I/O modules, and that the coupling level other- wise required with TELEPERM M can be omitted. However, intel- ligent SIMATIC S5 I/O modules are not suitable for operation on AS 235 automation systems.

The following are required to couple the AS 235 automation sys- tems to SIMATIC S5-115U I/O modules in the ER 701 subrack for extension units:

•Interface module for

SIMATIC S5 expansion units6DS1 321-8AA

• Connecting cable 721	6ES5 721-0..
• CC/EU interface module IM 310	6ES5 310-3AB11
with adapter casing	6ES5 491-0LB11
• Terminator	6ES5 760-0AA11

An ER 701 subrack can be directly connected via each of the two channels of interface module 6DS1 321-8AA. Further central or distributed expansion units can be connected to this (see Cat- alog ST 50). The number of SIMATIC S5 I/O modules which can be coupled to an interface module is limited, however, by the maximum addressing volume of 2 x 256 bytes (256 bytes per channel).

Notes:

•An ER 701-3 subrack cannot be used instead of the ER 701-2.

•The first half of the address area of each channel of the inter- face module (128 bytes) is reserved for digital inputs and out- puts and must not be used for analog inputs and outputs.

Siemens PLT 111 · 1999 7/3