Siemens LMV5 Quick Start Manual page 208

Converter RS-232 – RS-485
Technical requirements
Commercially available converters
Connection example: Connecting cable for interface converter type Hedin Tex H4/M4
LMV5 QSG Rev 4
This converter converts a V.24 / RS-232 port into an RS-485 port.
– Code transparency, that is, data must remain unchanged
– When using the RS-485 interface as a bus, control of the transmitting section on the RS-
485 side must be ensured by the transmitter power of the AZL...
– The interfaces must be galvanically separated to improve EMC
The technical specification provided by the suppliers of the converters must be observed
when doing planning work. Some of them do not meet the specifications of the LMV5...
system (e.g. operating temperatures). If required, technical measures must be taken (e.g.
suitable location).
The following types of converters have been tested by us with respect to function and im-
munity (voltage surges):

Supplier: Hedin Tex
Type reference: H-4
Contact address in Germany:
Hedin Tex GmbH
Am Herrkamp 14
D-24226 Heikendorf
www.hedintex.de

Supplier: IPC CON
Type reference: I-7520
Contact address in Germany:
Spectra Computersysteme GmbH, Humboldtstraße 36
D-70771 Leinfelden-Echterdingen
*www.spectra.de
AZL COM2
8-pole Western
1 TxD
__
2
3 RxD
4 GND
5 U1
6 GND
7 U2
__
8
Sec 8 Pg 14
Hedin Tex
Cable
interface converter
X1 RS-232
H4
21
__
22
16
(only for eBus adapter)
__
(only for eBus adapter)
__
M4
2
__
3
7
__
__
7550t05e/0703
www.scccombustion.com