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

This catalog is out of date, see note on page 2

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

Description and ordering data

Technical data

Power supply	DC 5 V/DC 12 V
	via AT bus
Current consumption	Approx. 1.8 A (DC 5 V)
Interfaces
- AT plug	AT bus of respective device
- Front plug	Redundant 20-m local bus output,
	open collector, asymmetric,
	for connection of a cable connector
	with metal front plug
Weight	Approx. 0.7 kg

Fig. 4/8 Interface module for 20-m local bus (N-AT)

Application

The module is used to connect the following systems/devices to the CS 275 bus system:

OS 520 operation and monitoring system

SICOMP industry-standard PC

HP 9000/7xx workstation AT-compatible personal computer.

For adaptation to the bus communication, a coupling software must be installed in these devices (except of OS 520 sys- tem).The interface module N-AT handles duties specifically con- nected with data transmission, including occasional control of data transfer.

Design

Plug-in card in long AT format with one plug on the front panel.

Slot: extension slot in AT format in the above-mentioned devices.

The interface module N-AT contains:

An SAB 80 188 microprocessor for controlling and monitoring all functions

A dual-port RAM system interface to the AT bus with asso- ciated control logic

An interface to the 20-m local bus with bus interface logic.

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.

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 coupling software to the dual-port RAM system interface and entered into the transmitter order list.

Ordering data

Order No.

Coupling package (hardware) to couple AT-
compatible personal computers to the CS 275
bus system,
comprising
- Interface module for 20-m local bus
	6DS1 222-8AB for AT-compatible personal
	computers
- Cable connector for 20-m local bus
	6DS8 208-8KC with 1 ES 902 plug and 1 Can-
	non plug, 2.5 m long
- Instructions for the interface module
¯ with German documentation									6DS1 222-1AB10
¯ with English documentation									6DS1 222-1AB20
Cable connectors
for bus participants with N-AT interface module
for 20-m local bus
¯ Cable connector for 20-m local bus									6DS8 210-8
	with 3 plugs ES 902 and 1 Cannon plug
	to connect a remote bus connection unit
	with 2 UI bus converters and a connection
	distributor
¯ Cable connector for 20-m local bus									6DS8 211-8
	with 1 Cannon plug and
	one free cable end
	(for soldering on)
¯ Cable connector for 20-m local bus									6DS8 212-8
	with 3 Cannon plugs to connect a bus
	participant with N-AT interface module to
	another bus participant with N-AT interface
	module
1.5 m		EC	3	m	MC	4	m	QC
1.8 m		GC	3.3 m		NC	4.5 m		RC
2.2 m		JC	3.6 m		PC	5	m	SC
Coupling software
¯ For PC with MS-DOS and MS-Windows:
	WIN TM								See Catalog PLT 150
¯ For HP 9000/7xx				workstation with RTAP/Plus
	under UNIX: CS 275-Scantask

4/8 Siemens PLT 130 . 1994