Cerberus Division
Introduction
e1476.doc
Data and design subject to change without notice. Supply subject to availability
© Copyright by Siemens Building Technologies AG Cerberus Division, CH-8708 Männedorf, Switzerland 1999
03.99
1 [14]
1
Introduction
The GW-23 interfaces both the peripheral control units and a virtual digital I/O sub-
system to a structured network such as:
•
X.25 via X.28 asynchronous RS-232 PAD
•
X.25 via ISDN channel D and asynchronous RS-232 terminal adapter
•
Ethernet TCP/IP protocol
Also, a dial-up, switched modem connection is supported as backup of any of the
above listed solution.
The GW-23 gateway is composed by one CPU board, one optional ethernet adapter
and one optional I/O board. The gateway is then installed on a connection board,
where the serial and I/O connections are made available.
Each GW-23 can manage up to
4 serial lines;
1 ethernet 10baseT connection;
up to 16 digital inputs and 8 digital outputs
Note:
The optional I/O espansion is supported only with special version of manage-
ment station software; this board is not documented in this edition of the GW-
23 technical manual.
The four serial lines can be connected to
one RS-232 adapter for X.28 or ISDN-D;
one full modem;
two to Cerberus control units, supporting Cerban protocol
Fig. 1-1 : GW-23
