Siemens CS 275 manual Interface module for 20-m local bus N-S5

This catalog is out of date, see note on page 2

Interface module for 20-m local bus (N-S5)

Description and ordering data

1 LED F (red), signals faults (line protocol faulty, receiver memory overflow)

2LEDs (green)

D signals ”Data transfer on bus”

M signals ”Interface module has master function” T signals ”Bus processor busy”

B indicates setting of interface module on bus B

A indicates setting of interface module on bus A

3DIP switch for function and address settings

4 DIP switch for function and address settings

5 Front plug for 20-m local bus

6 Base plug for connection to SIMATIC S5 bus

Fig. 4/7 Interface module for 20-m local bus (N-S5)

Application

The module is used to connect a SIMATIC S5-155U program- mable controller (CPU 946/947 or CPU 948) to the CS 275 bus system.

The KSN-S55 coupling software must be installed in the pro- grammable controller. It enables the controller to be matched to the requirements of bus communication.

The module handles duties specifically connected with data transmission, including occasional control of data transfer.

Design

Compact subassembly, double height, with 2 base plugs and 1 front plug.

Front panel width 20.32 mm = 1 1/3 standard slots.

Possible plug-in slots:

Central unit 155U (CPU 946/947), slots 35, 43, 75, 83 and 107 to 131

Central unit 155U (CPU 948), slots19, 35, 51 and 67 to 131.

Mode of operation

Data received via the CS 275 bus system pass through the line protocol controller of the bus interface logic in bit-serial mode and are placed into intermediate storage. The microprocessor reads the data byte-by-byte and stores them in the buffer memory of the module. Up to 70 complete messages can be stored in the buffer memory.

As soon as sufficient space is available in the dual-port RAM for a complete message, this is entered into the receiver order list of the dual-port RAM. Transmit messages are transferred from the function blocks of the KSN-S5E coupling software to the dual-port RAM system interface and entered into the transmitter order list.

Setting of address

In order to differentiate between the individual interface modules in the autonomous bus system, each interface module must be allocated a so-called participant address. In order to differenti- ate between several autonomous buses connected via bus cou- plers, each interface module must be allocated a bus address. These two addresses are set via DIP switches on the front panel of the interface module.

Technical data
Power supply	DC 5 V
Current consumption	1.8 A
Interfaces	Central unit of SIMATIC S5-155U
- Base plug
- Front plug	programmable controller
	Redundant 20-m local bus output,
	open collector, asymmetric,
	for connection of a cable connector
	with metal front plug and contact points
Weight	Approx. 0.5 kg
Ordering data
		Order No.
Interface module for 20-m local bus (N-S5),		6DS1 206-8AA
8 bit
KSN-S55 coupling software		See Catalog PLT 150
Instructions
Interface module for 20-m local bus (N-S5)		Order No.
German		C79000-B8000-C181
English		C79000-B8076-C181
French		C79000-B8077-C181
Spanish		C79000-B8078-C181

Siemens PLT 130 . 1994 4/7